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Alumina ceramics is a kind of alumina as the main material, after the specific work of manufacturing ceramic materials, due to alumina ceramics in conductivity, high temperature resistance performance and mechanical strength are very good, so it is mainly used in the thick film integrated circuit. Alumina ceramics is further processed into a variety of alumina ceramic parts, valve is one of them, although the metal valve through the improvement of structure and material, have greatly improved, but restricted by metal material properties, can not adapt to more and more high wear, strong corrosive condition of demand, thus show the short service life, revealed serious problems, such as, greatly affect the stability of the system operation. After replacing metal valve with alumina ceramic valve, a series of problems mentioned above have been properly solved. That is because ceramic material has very small thermal deformation, light weight, and much higher bonding strength than metal, and excellent corrosion resistance, so it can better adapt to the harsh working conditions of high wear and strong corrosion. In general, the crystal ion radius of alumina ceramic material is small, and the ion price is high, the coordination number is large, these inherent properties determine the compressive strength, wear resistance, hardness and other ceramic materials are very good. Although the "brittleness" of ceramic material itself and its difficulty in precise processing limit its application scope, the development and progress of martensite phase change toughening technology, composite material technology and nano-ceramic concept have greatly improved alumina ceramics and greatly improved their toughness and strength. In addition, grinding processing technology has also improved, so that alumina ceramic valves can be better formed, and the products in petroleum, chemical, mechanical and other fields more widely used, as an ideal substitute for traditional metal valves.

Metering Pump A metering pump moves a precise amount of liquid during a specified time period yielding an accurate volumetric flow. Metering pumps are used to pump chemicals, solutions, etc- There are a range of different metering pump technologies, and generally the application drives the pump selection. Critical application criteria include the viscosity, temperature, discharge pressure, required flow rate, and compatible wetted path materials. Most metering pumps have a pump head and a motor with some adjustment mechanism either manual or electronic depending on the pump manufacturer. Piston Pumps Many metering pumps are piston driven. A piston driven pump is a positive displacement method where the piston displaces the fluid in the reservoir chamber. The stroke and internal volume of the pumpingchamber determine the dispense amount and flow rate. Often piston pumps have two check valves on the inlet and outlet. As the piston recedes in the pumping chamber a negative pressure or vacuum is generated which opens the inlet check valve and pulls fluid towards the pumping chamber. Once fluid has filled the reservoir and the pump begins the discharge stroke, the piston pushes the fluid out of the fluid chamber through the outlet and through the outlet check valve. Instrument Pump Inc.`s positive displacement piston pump uses a valveless rotating, reciprocating precision ceramic piston. Located on the piston is a flat which act as a valve. The benefit of a valveless piston pump is there are no valves to clog. A valveless piston pump is ideal for applications with high viscosities as well as fluids with particulate or colloidal systems Advantages of metering with a valveless piston pump Compared with other metering pump technologies, valveless positive displacement metering pumps have a few key advantages: Long life span Pressure range up to 200 psi Independent flow rate at varying pressures High accuracy <0.5% High repeatability High precision Wide range of applications including high viscosities up to 250,000 cps. Valveless action enables pass through of particulate and solids Ceramic internals are chemically resistant to a wide range of corrosive materials One moving part

Ceramic plunger is a new high-tech product developed in recent years, among which the interposition can be glued inlaid metal mandrel, the outer tube is ceramic material, the ceramic tube and mandrel are threaded socket, and anaerobic adhesive is used to prevent loose. Performance and service life of ceramic plunger? It's about these things! Compared with metal plunger, ceramic plunger is characterized by low external roughness, low friction resistance, high temperature resistance and corrosion resistance. Its design life is 3 years. The series of aluminum oxide zirconia ceramic plunges, which have been processed and produced, are widely used in petroleum, chemical, food, textile, medical and other industries. Ceramic plunger has extremely high wear resistance, corrosion resistance and impact resistance performance. The matching precision between ceramic plunger shaft and outerwear can reach 0.001mm, and the finish can reach the mirror effect, thus reducing the friction coefficient, greatly improving the service life of plunger and improving startup efficiency. The ceramic plunger is selected for isostatic pressure molding to ensure the consistency of density, so that it will not crack due to the doubt of density in work. The surface is polished with diamond to minimize the surface roughness, so as to add lubricity and durability. According to the current oil, chemical, food machinery and other professional use of the plunger pump selected by the metal plunger corrosion resistance, short life of the shortcomings of the existing ceramic plunger joint unsound, simple drop of the status and developed a high-tech goods. Features: zirconia ceramics are used on the contact surface and working surface of the medium; mechanical combination of plunger and metal handle is used to fill the adhesive between ceramic parts and metal handle to avoid loose threads. Compared with the existing ceramic plunger ratio, it has the features of anti-dropping, joint strength and high strength. The service life of zirconia ceramic plunger is 10 times higher than that of metal plunger, and it can increase the life of sealing filler.

In the process of zirconia ceramics, the machining method has high efficiency, so it is widely used in industry, especially in the grinding, grinding and polishing of diamond grinding wheel. Other processing methods of zirconia ceramics are mostly suitable for punching, cutting or micro-machining. When cutting, diamond grinding wheel is mostly used for grinding cutting. When drilling, ultrasonic machining, grinding or grinding are conducted according to different aperture. The main problems of zirconia ceramics processing Although there are many ways to process zirconia ceramics, the processing cost is high, the processing efficiency is low and the processing precision is poor. One of the main reasons is that ceramics are very hard. For zirconia ceramics not burned or roasting, rough machining is used, and grinding is used after sintering. According to the different conditions of zirconia ceramics, it is also possible to directly grind the sintered body without processing to achieve the design accuracy. In terms of processing, zirconia ceramics are almost similar to metal parts, but zirconia ceramics have much larger machining allowance. In the rough processing of unburned or calcined ceramics, it is easy to have the problem of insufficient strength or surface defects, or because of insufficient assembly and other reasons, and cannot obtain the required final shape. Since the shrinkage cannot be uniform during sintering, the size should not be too close to the final size during rough machining, so there is a large margin for finishing. For metal working, finishing allowance should be a few hundredths of a millimetre as far as possible, if black leather is considered for thermal deformation and heat treatment. For ceramic machining, finishing allowance should be a few millimeters or even a dozen millimeters. High machining allowance, low productivity and high production cost. The other problem of zirconia ceramics processing is that the high cost of cutting tools, such as sintered diamond and CBN tools, is required for high cost cutting. The precision processing is mainly based on diamond grinding wheel, so the cost of cutting tools is tens to hundreds of times higher than the tools used in metal cutting. The strength of zirconia ceramics is sensitive to processing conditions and it is difficult to achieve high efficiency processing so the processing cost of zirconia ceramics is much higher than that of ordinary materials.

Ceramic has a common character, that is hardness is big, but very fragile, so process difficulty is very big, so purity is 99 alumina ceramic process hardness and brittleness how?Let me give you an analysis of yuefei ceramics factory. 99 alumina ceramics refers to engineering ceramics with a content of more than 99%. According to the national standard GB/ t5593-1999, 99 alumina ceramic materials have a high hardness, high strength, low expansion coefficient, and are insulated, wear-resistant and corrosion-resistant, which are widely used in mechanical manufacturing, aerospace, precision instruments, petrochemical and other fields.Aluminum oxide ceramic parts are usually formed by isostatic pressure sintering. As sintering often leads to deformation and shrinkage, more finishing is needed to ensure the size accuracy and shape accuracy of the parts.However, alumina ceramics generally have large elastic modulus, high hardness, high brittleness and strong crack sensitivity. Alumina ceramic processing hardness: main AL203 are alpha, beta, gamma three crystal morphology, the crystal morphology of alpha AL203 most stable, 1300 ℃ I3 almost completely into the alpha and gamma crystallization crystallization. In the crystalline form of epoxy-al203, the atomic bonds formed by aluminum ions and oxygen ions are mostly covalent bonds, ionic bonds or their mixed bonds. Therefore, the binding energy between atoms is very high and has a strong directivity. Its hardness is equivalent to that of carbide cemented carbide and several times higher than steel. Usually, high-purity alumina ceramics have a density of 3980 (kg-m4), tensile strength of 260 (MPa), elastic modulus between 350 and 400 (GPa), compressive strength of 2930 (MPa), especially its hardness of 99HRA. The strength and hardness of alumina ceramics have been reduced. According to the determination of experimental samples, the hardness of alumina ceramics at room temperature has reached 70HRA. Alumina ceramics machining brittleness: normally alumina ceramic microstructure of equiaxed grain, is made up of polycrystalline ionic bond or covalent bond structure, fracture toughness is low, therefore, under the action of external load, the stress will make the ceramic surface produces slight crack, the crack will rapidly expanding and appear brittle fracture, therefore in the process of alumina ceramic cutting, o often occurrence collapse phenomenon, namely in the ceramic surface cracks, small gouges where whole pieces were missing. The reasons for the burst phenomenon are: (1) the final separation of the excised part of the material and the processed surface is caused by tensile failure, which is not the result of normal cutting. (2) the crack caused by crushing cutting deformation is generally always cracking down along the workpiece surface. At this time, the collapse phenomenon is formed due to the cutting tension stress, which flakes the cutting and the workpiece matrix together. It should be noted that the larger the tensile stress, the more serious the burst phenomenon, which may lead to the waste of the entire workpiece.

The ceramic spool valve is connected up and down by cylinder, valve body and outlet colloid. The cylinder and valve body are separated by diaphragm to avoid glue penetration into the air cavity. The valve in the outlet colloid is fixed on the piston rod. As a result of its advantage performance in point glue machine extensive use, so using ceramic point glue valve has what advantage? Let me introduce you to that. Four advantages of ceramic point glue valve: 1. Reduce the possibility of glue leakage and the liquid flows smoothly The device produces the least back pressure when used, and the control pressure of the ceramic spool valve can ensure the stability of the glue. Besides, the ceramic spool valve is resistant to high temperature and corrosion, and will not form the blockage of glue liquid flow, while the ceramic spool valve can perfectly solve the problem of glue valve leakage. 2. Zirconia ceramic point rubber valve can solve the slow flow rate The slow flow rate of the spool valve is also due to the metal spool valve material. If the metal temperature is too high and the liquid is out of date, it will condense and form a blockage, which will slow down the flow rate accordingly and cause the size of the glue to be inconsistent. The ceramic point glue valve made of zirconia ceramic material can perfectly solve this problem. Zirconia ceramic itself has the characteristics of wear-resisting and high-temperature resistance. Even under thousands of high temperatures, it can still guarantee the normal circulation of liquid. 3. Zirconia ceramics can guarantee that the liquid will not dry up in the valve This situation is mainly caused by excessive moisture or re-used instant glue. The ceramic spotter valve will not cool the temperature of the valve body due to the use environment. Therefore, the zirconia ceramic spotter valve can guarantee the constant temperature state. The above is the introduction of the advantages of using zirconia ceramic spooler valve, while the high-quality ceramic spooler valve in China's market can guarantee the smooth use of the spooler and the solid durability of the equipment. Therefore, the ceramic spooler valve plays an especially significant role in the spooler device, and the above advantages will be recognized by more consumers.

The machining efficiency of zirconia ceramic is high, so it is widely used in industry, especially diamond grinding wheel grinding, grinding and polishing.Other processing methods of zirconia ceramics are mostly suitable for drilling, cutting or micro-machining.When cutting, diamond grinding wheel is usually used for grinding cutting. Ultrasonic machining, grinding or grinding are carried out according to different hole diameters when drilling. Main problems in zirconia ceramic processing Although there are many ways to process zirconia ceramics, the processing cost is high, the processing efficiency is low and the processing precision is poor.One of the main reasons is that ceramics are very hard.For zirconia ceramics, the unfired or roasting materials are mainly roughed by cutting and grinding after sintering. According to the different situation of zirconia ceramics, the sintering body can be grinded directly without processing to achieve the design precision.In terms of processing, zirconia ceramics are almost similar to metal parts, but the processing surplus of zirconia ceramics is much larger.In the rough machining of unburned or roasting ceramic, it is easy to get the required final machining shape due to insufficient strength or surface processing defects, or because of insufficient loading.Because the shrinkage cannot be maintained even when sintering, the size should not be too close to the final size when roughing, so the remaining amount of precision machining is large.For metal processing, the finishing allowance should be as much as a few millimeters, if thermal deformation and heat treatment are taken into account.For ceramic processing, the finishing allowance should be several millimeters or even ten millimeters.High machining allowance, low productivity and high production cost. Another problem of zirconia ceramic processing is that the high cost of cutting tools requires the use of sintered diamond and CBN tools, and the precision machining is also dominated by diamond grinding wheels. Therefore, the cost of cutting tools is dozens to hundreds of times higher than that of metal cutting tools.The strength of zirconia ceramics is sensitive to processing conditions and it is difficult to achieve efficient processing, so the processing cost of zirconia ceramics is much higher than that of ordinary materials.

The machining efficiency of zirconia ceramic is high, so it is widely used in industry, especially diamond grinding wheel grinding, grinding and polishing.Other processing methods of zirconia ceramics are mostly suitable for drilling, cutting or micro-machining.When cutting, diamond grinding wheel is usually used for grinding cutting. Ultrasonic machining, grinding or grinding are carried out according to different hole diameters when drilling. Main problems in zirconia ceramic processing Although there are many ways to process zirconia ceramics, the processing cost is high, the processing efficiency is low and the processing precision is poor.One of the main reasons is that ceramics are very hard.For zirconia ceramics, the unfired or roasting materials are mainly roughed by cutting and grinding after sintering. According to the different situation of zirconia ceramics, the sintering body can be grinded directly without processing to achieve the design precision.In terms of processing, zirconia ceramics are almost similar to metal parts, but the processing surplus of zirconia ceramics is much larger.In the rough machining of unburned or roasting ceramic, it is easy to get the required final machining shape due to insufficient strength or surface processing defects, or because of insufficient loading.Because the shrinkage cannot be maintained even when sintering, the size should not be too close to the final size when roughing, so the remaining amount of precision machining is large.For metal processing, the finishing allowance should be as much as a few millimeters, if thermal deformation and heat treatment are taken into account.For ceramic processing, the finishing allowance should be several millimeters or even ten millimeters.High machining allowance, low productivity and high production cost. Another problem of zirconia ceramic processing is that the high cost of cutting tools requires the use of sintered diamond and CBN tools, and the precision machining is also dominated by diamond grinding wheels. Therefore, the cost of cutting tools is dozens to hundreds of times higher than that of metal cutting tools.The strength of zirconia ceramics is sensitive to processing conditions and it is difficult to achieve efficient processing, so the processing cost of zirconia ceramics is much higher than that of ordinary materials.

Zirconia ceramic rods are familiar to all, indeed, they have been used more and more with the improvement of our modern science and technology. And zirconium oxide ceramic rod because everybody likes, naturally is inseparable with his character. As we all know, generally speaking, alloys have higher hardness and compactness, and zirconia ceramic rods are one of the most excellent alloys. Many manufacturers hope to improve the compactness of zirconia ceramic rods to a greater extent when producing and utilizing zirconia ceramic rods. It is necessary to improve the compactness of zirconia ceramic rod. First of all, improving the compactness of zirconia ceramic rod can make zirconia ceramic rod have greater toughness. This can make us more handy when we use it. In addition, increasing his density can ensure a longer service life. How to improve the compactness of zirconia ceramic rod? I'm going to introduce you. First of all, we need to start with the material of zirconia ceramic rod. We all know that zirconia ceramic rod is mainly made of zirconium element and ceramic is the auxiliary material. In the overall production, the zirconium metal element is responsible for the overall toughness. Ceramic, a material, can also greatly enhance the toughness of zirconia ceramic rods. But in general, its main function is to enhance the aesthetics. Therefore, in the production process of zirconia ceramic rod, we should pay attention to the matching ratio between zirconia and zirconium metal as much as possible, so as to ensure that the produced zirconia ceramic rod can have good compactness. Besides paying attention to the proportion of collocation, we also need to control the processing technology. As is known to all, it is impossible to combine zirconium elements and ceramics directly. You have to heat them up and melt them together. The process is not as simple as many people think. If you don't pay attention to the temperature when you're heating it, the densification is likely to be greatly reduced. As for how to improve the compactness of zirconia ceramic rod, we have made a brief introduction. I believe you all have some experience after watching how to improve the compactness of zirconia ceramic rod. You can pay more attention when you're in production.

Every day we can feel life is undergoing subtle changes, and the development of our society and changes in the new product and reflected in the process of the launch of new technologies, like strong currents pushing the progress of life, a new type of material and impressive new technology bearing the subversive historical mission, once upon a time we use cutting knife is iron, often need to burnish to stay sharp blade, and take in the hand feeling is heavy, because we are accustomed to using metal cutting tools, so iron dao should be in our consciousness, until the emergence of the ceramic knife, let a person feel the life is really too incredible, This kind of knife is not only sharp but also light in quality without grinding, which is the performance advantage of zirconia ceramic products. Zirconia ceramic knife must replace traditional metal cutter and enter the kitchen of ordinary people. In fact, zirconium oxide ceramic products have many applications in life. In below for some examples of zirconia ceramics used in life, each person with buttons may be worn in my life, even the most modest person will have one or two pieces of hand or pendant, again simple men always want to give oneself buy a decent watch, there are some more smooth and have above grade clothes porcelain burnish button is made of zirconia ceramics, because of this the quality of a material of buttons and appearance is very excellent, and wear resistance do not fade, is a very good ornament, costumes and zirconia ceramic itself is jewelry materials, many girls like to wear the hand of the string and the pendants are made of zirconia ceramics, In addition, there is the watch case, will use zirconia ceramics, by virtue of the performance of zirconia ceramic products, so that the business occupies a place in the market. Above has the zirconia ceramic products has made the simple introduction, then to reveal another layer of zirconia ceramics USES, the application of zirconia ceramics not only the common things in our life, in the field of industrial production zirconia ceramics also has an important influence, such as open every day in our zirconia ceramic parts in car, you can't see it in our engine inside, it is high temperature resistant and very corrosion resistant grinding small, do not occur along with the change of temperature deformation, in improve engine performance and longer service life. The performance advantage of zirconium oxide ceramic products has been highlighted in the application, and a wider application prospect is waiting for people to discover and expand.

99% alumina ceramics is refers to the alumina content higher than 99% of the engineering ceramics, according to the regulation of national standard GB/T5593-1999, 99 alumina ceramics high hardness, high strength, low expansion coefficient, and insulation, wear resistance, corrosion resistance, in machinery manufacturing, aerospace, precision instrument, petrochemical and other fields have a wide range of applications. Alumina ceramic parts are usually formed by hot pressing sintering. As sintering often leads to deformation and shrinkage, further precision machining is generally required to ensure the dimension and shape accuracy of the parts. However, alumina ceramic materials generally have large elastic modulus, high hardness, high brittleness and high crack sensitivity. Therefore, its mechanical processing difficulty is mainly reflected in machining hardness and brittleness. Alumina ceramic processing hardness: main AL203 are alpha, beta, gamma three crystal morphology, the crystal morphology of alpha AL203 most stable, 1300 ℃ I3 almost completely into the alpha and gamma crystallization crystallization. Crystal morphology chinalco in alpha AL203 ions and oxygen ions formed by atomic bonds are covalent bond, ionic bond, or their mixture, so the high binding energy between atoms and have very strong directivity, the specific performance for brittle materials, plastic deformation is small, easy to produce crack; Its hardness is equivalent to the hardness of carbide carbide, several times higher than steel, usually high purity alumina ceramic density of up to 3980 Kg - the m4), tensile strength of 260 (MPa), modulus of elasticity between 350-400 (GPa), compressive strength of 2930 (MPa), especially its hardness is 99 hra. The strength and hardness of alumina ceramics have been decreased. According to our test sample, the hardness of alumina ceramics also reached 70HRA at room temperature. Alumina ceramics machining brittleness: normally alumina ceramic microstructure of equiaxed grain, is made up of polycrystalline ionic bond or covalent bond structure, fracture toughness is low, therefore, under the action of external load, the stress will make the ceramic surface produces slight crack, the crack will rapidly expanding and appear brittle fracture, therefore in the process of alumina ceramic cutting, o often occurrence collapse phenomenon, namely in the ceramic surface cracks, small gouges where whole pieces were missing. The reasons for the phenomenon of collapse and gap are as follows: (1) the final separation of the excised part of the material from the processed surface is caused by tensile failure, which is not the result of normal cutting. (2) the avalanche crushed cutting deformation cracks usually bring along the surface has been cracking down, at this point, the phase bonding of tensile stress will be cutting and cutting workpiece o matrix spalling together to form a collapse phenomenon. It should be noted that the greater the tensile stress, the more serious the crack phenomenon will be, which may lead to the waste of the entire workpiece.

Zirconium oxide has been widely used for its excellent high temperature physical and mechanical properties, especially for key components used in harsh conditions.The thermal stability of zirconia products is poor because of its low thermal conductivity and high thermal expansion coefficient.However, the thermal stability of ceramic products made from partially stabilized zirconia materials is the best.Therefore, the production of structural zirconia ceramics is often made from partially stable zirconia materials rather than fully stable zirconia materials.The production of zirconia structural ceramics generally USES 3mo1 % Y203 stable zirconia superfine powder.The production process of zirconia ceramic structural parts is discussed from two aspects of forming and sintering. At present, there are three kinds of forming methods for zirconia structural ceramics: hot-die casting, dry pressing and isostatic pressing. 1. Hot die-casting molding Small products or products with complex shapes for zirconia structural ceramics.Generally, hot die casting molding method is adopted.The forming method is simple, especially suitable for small and medium sized products with large batch or complex shape.But zirconia hot die casting products is easy to appear when arrange wax cracking, deformation and other defects, it is because the zirconia ceramic slurry particle size small, powder specific surface area is big, hot die casting size, modulation of paraffin wax and oleic acid and significantly higher than that of other ceramic products, resulting in body contraction is big, easy to appear when arrange wax cracking, deformation defects, etc.Therefore, when debugging the slurry, it is necessary to understand the amount of paraffin and oleic acid added and the way of adding people, and design a reasonable paraffin burning curve and other relevant technical parameters, so as to avoid the above defects. 2. Dry pressing Small and medium sized zirconia ceramics with simple shape and suitable for dry pressing are usually formed by dry pressing.Zirconia ceramics there was a common problem is the product of dry pressing layering, this is because zirconia ultrafine particles of the powder granulation material is very thin, so light particles, liquidity is poor, dry pressing molding will easily appear statified phenomenon.Learned from the production practice, layered with the molding mould finish product and cooperate with the situation, the molding pressure, pressure mode speed, pressure and speed of the holding time, parting ways, parting have a relationship in which the following are the several factors influence on dry pressing molding points above are as follows: A. Finish and fit of the mold Dry pressure molding requires high quality of the mould. First, the hardness of the mould is required to meet certain requirements.Because zirconia stabilized material particles is very thin, liquidity is poor, so for the mould finish requirement is very high, if the finish can not meet the requirements, the dry pressing effect of material flow, leading to the emergence of the layered.Bad cooperation at the same time, if the mould, gap is big, because zirconia powder fine grain, pressed powder will issue from the mould clearance, resulting in mould powder, less around such pressing around cannot compaction, which will appear due to inconsistent pressure transmission layer, therefore with requirements for mould is higher. B. forming pressure The forming pressure is very important in the process of zirconia dry pressing.If the pressure is too small, the density of the product after burning is small, the product shrinks greatly, and the degree of compaction of the billet body is not enough, stratification is easy to occur.But the pressure is too great, the billet is also prone to crack, lamination and difficulty in mold release.Proper forming pressure needs to be explored through production practice. C. pressure method There are two kinds of pressure methods when general dry pressing molding, one is single side pressure, the other is double side pressure.When the single side pressure, one end of the compression stress directly, a significant pressure gradient, powder more illiquid, the billet in the greater the pressure difference, the more prone to delamination.Double pressure, direct pressure on both ends of the body, so the density at both ends, the middle density is small, the pressure gradient of the effective transmission distance is half that of single pressure, so the body's density is much more uniform than single side pressure.Therefore, zirconium oxide ceramics should be pressurized on both sides in dry pressing. D. Pressure speed and pressure holding time Poor control of pressure speed and pressure retention time will also cause the formation of zirconia billets.Die falling speed should be slow some, such as pressure too fast, the gas is not easy to drain in the body, leading to the body appear statified, surface density and loose the middle, and the phenomenon such as there are air bubbles.Such as the holding time is too short, the pressure is not due to the depth of the external force has been uninstalled, such gas is not easy to drain in the body, it will be difficult to get the ideal body, will cause the body appear the phenomenon such as layering and existing bubbles.At the same time pressure preservation time should be uniform, otherwise it will lead to uneven thickness of products, resulting in waste products. E. demoulding mode and demoulding speed In general, tool is used to push the billet out of the die cavity when dry pressure is removed.The practice shows that the tool should be smooth when the mould is removed, otherwise it will cause the crack due to uneven force on the billet body.In a word, dry pressing and the above several factors are all related to the formation of an ideal body, the above aspects should be well controlled. 3. Isostatic pressing molding For special shape and large size zirconia structural ceramics, isostatic pressing is required.Isostatic pressing molding pressure on the body due to the direction of the uniform is equal, and pressure is big, thus forming the body after the high density, uniformity, good burning into narrow, not easy to deformation, cracking and delamination.Easy to appear when the molding method can avoid dry pressing the layered, especially the zirconia products forming thicker, layered, appear easily when dry pressing and isostatic pressing molding can be avoided, so the molding method is commonly used methods for production of zirconia products.But the body need to process after the isostatic pressing molding, so will waste part of raw material, at the same time, because the body is very hard, processing more troublesome, and slow processing speed requirements, otherwise the body prone to rupture, the production efficiency is not high. .Firing At different temperatures, zirconium oxide has three isomorphic forms, namely, cubic crystal system, monoclinal crystal system and tetrahedral crystal system.The transformation temperature of zirconia crystal is as follows: The conversion from monoclinal to tetrahedral has a volume change of about 7%.When heated, the volume shrinks from monoclinal zirconia to tetrahedral zirconia.The shrinkage and expansion did not occur at the same temperature. The former was about 1200 absolute C and the latter was about 1000 absolute C. The sintering temperature of zirconia ceramics and the raw material, the preparation methods, fineness, the amount of additive type and how many and different, generally between 1500 ~ 1650 DHS C, so the firing curve of zirconia ceramics is not regulated, and

Industrial ceramic plunger is made of high hardness, high temperature resistant ceramic, high lubrication and corrosion resistant ceramic with good performance, so what are its advantages in use? Below yue fei ceramics factory everybody analyses. Ceramic plunger is similar metal pump is a kind of ideal alternative products, because in the use of metal material is more easy to corrosion, while ceramic plunger is highly resistant to corrosion, in addition, the ceramic plunger in production when using the modern engineering ceramic material, so also has the ultra hard wear-resistant, currently has been widely used in medical equipment, environmental engineering, petroleum and chemical industry, etc. Ceramic plunger is mainly used in petroleum, chemical industry, machinery, mechanical plunger plunger type is used to replace metal, metallic plunger poor corrosion resistance, resistance to low temperature lead to equipment of the question of short life. Ceramic plunger products have high wear resistance, corrosion resistance and thermal shock resistance, which is 10-20 times longer than the service life of metal plunger. It has been proved that the use of ceramic plunger can not only greatly improve the use of polymer in the original oil field. Of technical innovation for metering pump plug, for example, using metal materials as the injecting polymer corrosive, easy cause plunger seal is lax, serious leakage influence injection effect, thus must be replaced weekly plunger, affect production and caused great waste. After repeated testing by the technical personnel of this oil mine, the application of ceramic plunger was successful. The normal production started the platform pump every day.

MingRui zirconia ceramics factory is a professional production of finish machining of various models of various sizes of industrial ceramic rod manufacturers, the main material such as zirconia and alumina ceramic material, and there are white, yellow, blue and black color, produce ceramic rod have excellent high-temperature abrasion resistance and other properties. In the whole chain of industrial ceramic chain, the position of ceramic rod is relatively special, also known as precision ceramic rod. Because in the actual production process, has very strong technical strength and the high standard request, therefore represents the ceramics industry progress and the development highest level. In the production practice of ceramic rod, it is also a basis for development to launch high-quality products, create first-class products and adapt to the actual needs of modern production. The pursuit of perfect ceramic rod design, professional production and development progress, played a very good role. Ceramic rod structure of various products, classification is more and more fine, finer and design level, the pursuit of perfect design style and features, create modern fashion standard, perfect for production, better service in actual industrial production. In the process of horizontal comparison, it is not difficult to find that, in the center of the ceramic rod production practice, the refinement process requirement standard, to reach the highest level, only is one of the most important industrial ceramic products, and by far, the most clear, the type of the highest standard. Professional production of ceramic rods is a modern fine development of ceramic production of the most important. Different from art ceramic, it can be designed by imagination and according to actual needs. Ceramic bar products in the production progress of the practice process, the pursuit of perfect quality, because it is directly related to the safety of production, as well as the accuracy of functions. Like electric porcelain products, high-quality practical, to protect the safety of electrical equipment and power, is a matter of life and is extremely important, in the process of production, also let no sloppy, just do your best, can we truly services in industrial production.

Engineering ceramics have a variety of materials, one of the most widely used is alumina ceramic, it can be 1750 degrees of high temperature resistant, corrosion resistance to high temperature ceramic, the following MingRui ceramics factory were emphatically introduced the engineering ceramics, the following introduce alumina ceramics. Alumina ceramics is one of the most widely research and application of engineering ceramics, with high melting point (2050 ℃) and high hardness (hra), 90-92, insulation performance is good, volume resistivity is as high as 1015 Ω · cm), chemical stability is good wait for an advantage, is widely used for high temperature structural materials, wear-resistant materials, electrical insulating materials and chemical corrosion resistant materials, such as high temperature kiln furniture material, the wear-resisting lining and grinding body, electric vacuum tube shell and ceramic substrate, high temperature flue gas purification ceramic membrane materials, chemical, transparent ceramic electronics lens cap, wear resistant coating and so on. 99% alumina ceramic pad plate The key to the preparation of high performance alumina ceramics lies in the purity, particle morphology and particle size distribution of the powder. In recent years, with the increasing demand for transparent alumina ceramics and sapphire crystals, the preparation technology of high purity ultra-fine or nanometer sized alumina powders has been developed rapidly. The raw material for preparing transparent alumina ceramics is high purity ultrafine powder with purity up to 4N and particle size less than 100nm, while sapphire crystal growth requires the purity of raw materials up to 5N. Domestic high purity alumina powder has entered the stage of industrialization production, but due to a lack of stable production technology and equipment and disconnect test research and production application, stability in batches, powder particle size distribution and removal of trace element and so on is still a gap compared with abroad.

Many people don't know about zirconia ceramics,Zirconia ceramics is a new type of high-tech ceramics, it besides has the fine ceramic should have high strength, hardness, high temperature resistant, resistant to acid and alkali corrosion and Gao Huaxue condition such as stability, also has a general ceramics high tenacity. So a lot of people ask zirconia ceramics are acid-base resistant to corrosion? Zirconia ceramics have a good balance of acid and alkali resistance, which can be used in medium strong acid or alkali environment under general conditions. Not resistant to high strength acid and alkali. If the environment is above 1:9 concentration of hydrochloric acid, or more than 10% concentration of sodium hydroxide solution, there will still be more obvious corrosion. Zirconia ceramics itself nature is wear-resisting, high temperature resistant, acid and alkali corrosion resistance, good insulation, because of its raw materials are relatively cheap, accessible, and therefore is widely used in machinery, electronics, chemical industry, refractories and other industries (remember not to acid alkali). Performance parameter list

One, the first is the way of chemistry, mainly in the specific solution, chemical oxidation is used to form the color of the film, however, require reference to ultimately ensure consistent color, so this way also is common in use. Second, followed by the high temperature oxidation method, the workpiece must be kept within the scope of the process, then the direct immersion in particular good molten salt, after chemical reaction, can form a layer on the surface of the oxide film thickness consistent, and can present a different color. Three, the last is ion deposition oxide or oxide way, this way is suitable for use in large quantities of product processing, such as our common band at ordinary times, many watch belt and hand casing is coated with titanium, so basic it is golden yellow color, the main principle is that this way will the artifacts of stainless steel in the vacuum coating machine, again and again by vacuum evaporation plating, however, because of its cost is higher, and the investment is large, so it is not suitable for use in small batch production.

Zirconia ceramics with high toughness, high flexural strength, high wear resistance, excellent thermal insulation performance, thermal expansion coefficient and other advantages are favored by users. Now it has a number of unique features, which is to combine with stainless steel to make a stainless steel and zirconia ceramic composite. In actual production, the required materials should be prepared first. Besides stainless steel and zirconia ceramic parts, molybdenum foil and nickel foil are required as auxiliary materials. Then the nickel metal layer is deposited on the surface of zirconia ceramics. The process is very simple, so long as the zirconia ceramics, molybdenum foil, nickel foil and stainless steel pieces are put into a joint mold. In this way, molybdenum foil and nickel foil are placed between zirconia ceramic and stainless steel parts, and molybdenum foil is adjacent to the nickel metal layer on zirconia ceramic parts, and nickel foil is adjacent to stainless steel. Then connect the mold into a hot pressing sintering furnace, the zirconia ceramic under protective atmosphere, molybdenum nickel foil, foil and stainless steel pieces of solid phase diffusion bonding, stainless steel with zirconia ceramic composite is obtained. When the workpiece is cooled, it can be removed from the hot pressure sintering furnace, and thus the former stainless steel and zirconia ceramic composites are obtained. Since the melting point of zirconia is higher than the melting point of stainless steel, the general stainless steel will melt before the zirconium oxide. As long as the above method is used, the two can be combined well.

The valves made by zirconia or alumina ceramic have many advantages: 1.Long service life The research shows that the ceramic valve core can withstand the operation after more than 500 thousand times, and the utility model can be operated smoothly and labor-saving, and can be used for a long time. The ceramic valve core has the advantages of aging resistance, wear resistance, no maintenance, guarantee the stability of operation, save maintenance costs and labor intensity and so on. At the same time, aging resistance and wear resistance also make the service life of the ceramic valve core far exceeds the service life of other valve cores. 2.Excellent sealing Ceramic materials with high tensile strength, non deformation, high temperature resistance, low temperature resistance, wear resistance, non corrosion characteristics determine the excellent sealing performance of ceramic materials. The ceramic valve core makes the mechanical equipment difficult to leak liquid, saves cost, and is environmentally friendly.

CERAMITEC 2018 International ceramics exhibition in Munich, Germany Event date: April 10, 2018 to April 13, 2018, every three years. Exhibition hall: New international exhibition center, Munich, Germany. Address: Munich, Germany, Europe. Industry: construction, decoration, hardware. Organizers: International fair company of Munich, Germany & China exhibition group - the largest exhibition of Chinese organizers of Ceramics exhibition. The most influential exhibition of international ceramics industry, a unique international event of every three years. The 650 exhibitors are from 37 countries with an exhibition area of 40,000 square meters. The 16733 professional audience is from 106 countries, international audiences accounted for more than 57 percent. In 2015, there were 83 exhibitors came from China, the amount is the second largest in all countries, after Germany and overtaken Italy.