The ceramic core is an abbreviation of a ceramic core used in the investment casting process. As an adapter for forming a cavity of a casting, the function is to form a cavity structure of the casting, and together with the outer mold and the mold shell, the casting pair is ensured. The dimensional accuracy requirements of the cavity. Ceramic cores are commonly used to form cavities for castings that are complex or difficult to shape, as a special process for simplifying process difficulty and reducing the cost of the product. The EC85 precision ceramic core devel

Ceramics are the oldest material and the first chemically derived product obtained by humans to conquer nature. It appears much earlier than metal materials and is one of the symbols of human civilization. Product categories: ceramic plungers, ceramic pump cores, ceramic valve cores, ceramic pistons, ceramic bushings, ceramic suction cups, microporous ceramics, etc.; Alumina, zirconia, silicon nitride, silicon carbide. It is also an important research object in the history of human civilization. 1. Traditional Ce

Zirconium oxide is the main oxide of zirconium. It is usually white odorless and odorless crystal. It is an important high temperature resistant material, ceramic insulating material and ceramic sunscreen. It is also the main raw material of artificial diamond. Zirconium oxide is very common in life. It has good mechanical strength in precision ceramic products under normal temperature conditions. And it has low thermal conductivity and high toughness, and it is a product that overcomes the drawbacks of ceramics that are too brittle and fragile.

1. Anti-scratch resistance: The special surface structure of the ceramic shaft makes the ceramic shaft not easily damaged under the action of external hard objects. 2, good stability: the surface of the ceramic shaft can be flame retardant, good fire resistance, will not melt, ceramic shaft is the nemesis of all acid and alkali goods and other chemicals, whether it is disinfectant, cleaning agent or chemical dye, ceramic shaft No effect on the surface. 3. Easy t

1. When the material is oxidized, the effects of the treatment, such as the composition, content, concentration, temperature, treatment time, etc., will affect the final product. 2. In the closed coloring process of the product, due to the color difference already existing in the production of the material, the difficulty of the sample, the color and the coloring are increased; 3. The metal element content and material texture of the aluminum plates of different

The application of silicon nitride ceramics is mainly used in machinery, metallurgy, chemical, aerospace, semiconductor and other industries, as parts of certain equipment or products, and has achieved good expected results in recent years, along with manufacturing processes and test analysis. The development of technology, the reliability of silicon nitride ceramic products is constantly improving, so the application surface is constantly expanding. It is particularly commendable that silicon nitride ceramic engines are being developed and great progress has been

In order to obtain structural ceramics with excellent comprehensive mechanical properties, fine, dense, uniform and pure are important directions for development. This requires high purity of silicon nitride powder to ensure the purity of the product and effective control of the second phase. It is required that the powder contains a high α phase, a small particle size and a regular morphology to obtain a good sintering activity, and the powder is required to have a narrow particle size distribution to avoid abnormal growth of the grain and cause a decrease in st

Silicon nitride gear industry information Large-sized transparent and transparent ceramics for transparent and transparent infrared ceramic materials used in military defense, such as Y2O3 (yttria), MgO (magnesium oxide), AlON (Along), MgAl2O4 (magnesium aluminum spinel) ceramics and lasers Characteristics Nd:YAG) Transparent Ceramics At present, our technology is limited to the preparation of limited size. It is still difficult for large-size transparent microwave-transparent ceramic materials that have reached half a m

The zirconia ceramic is a ceramic material in which ZrO2 is a main phase. ZrO2 has a melting point of 2677 ° C and has three crystal forms of monoclinic, tetragonal and cubic, and the phase transition temperatures are 1100 ° C and 2370 ° C, respectively. Generally, CaO, MgO, Y2O3, etc. are used as stabilizers to form stable ZrO2 or partially stabilized zirconia; zirconia ceramics have high activity, and are exposed to free (active) silicon oxide and oxidation in a high temperature environment. Iron is immediately reacted or contaminated; the color of pollution

1. From the production process, there are mainly two kinds of sintering method and electrofusion method. If there is no control at a certain key production stage, there will be bubbles, snowball beads, tail beads, flat (elliptical) beads, and the above four beads. In the grinding process will be very easy to break, so remind everyone to choose the zirconia beads in the future, pay attention to the above four zirconia beads. 2. As far as the beads themselves are concerned, whether the quality problems and the stre

Special ceramics refers to ceramics with special mechanical, physical or chemical properties. It is applied to various modern industries and cutting-edge science and technology. The raw materials used and the required production technology have been greatly different from ordinary ceramics. The country calls it "precision ceramics". Recently, China's material experts agree that it is called "advanced ceramics". Special ceramics can be subdivided into structural ceramics, functional ceramics and tool ceramics according to their performance characteristics and appli

Special ceramics were developed in the twentieth century. Under the promotion and cultivation of modern production and science and technology, they "reproduced" very quickly. Especially in the past two or three decades, new varieties emerged in an endless stream. According to the chemical composition, there are: Oxide ceramic Oxide ceramics: alumina, zirconia, magnesia, calcium oxide, cerium oxide, zinc oxide, cerium oxide, titanium dioxide, cerium oxide, uranium trioxide, and

What is a ceramic watch? Ceramic watches refer to the use of ceramic materials. Ceramic watches such as ceramic watches have been made from ceramics such as zirconia and cermet. Ceramic material is zirconia ceramic which is known as "ceramic steel" because of its phase transformation toughening property, the strength and toughness of known oxide ceramics, and the best comprehensive performance. How about the ceramic watch?

Cubic zirconia, also known as the Soviet stone, is rare in natural cubic zirconia, which is generally synthetic. Cubic zirconia was first developed by the Soviets, hence the name Soviet Stone. Also known as "cristobalite" or "USSR drill", it is a type of zirconia crystal. When zirconia is naturally present, most of it is monoclinic crystal, mainly in the presence of mineral "oblique zircon". Zirconium oxide, which exists in cubic single crystals, is extremely rare in nature, but is now often synthesized by artificial met

With the development of modern high-tech, advanced ceramics has gradually become an important part of new materials, and has become an important key material for the development of many high-tech fields. It has received great attention from various industrialized countries, and its development is also largely Affect the development and progress of other industries. Due to the specific fine structure of advanced ceramics and its high strength, high hardness, wear resistance, corrosion resistance, high temperature

In the past 20 years, whether it is the casting molding technology invented six or seventy years ago, atmospheric pressure sintering, or the injection sintering technology and spark plasma sintering technology that have just emerged in the first or second years, in order to meet the needs of application and research. Both have carried out large-scale technological upgrades, and relevant theoretical research has made great progress. The domestic advanced ceramic system has been continuously expanded, and the prepa

In addition to pressing the powder into a certain shape, the molding of the ceramic ceramics of special ceramics can also exert pressure to make the powder particles interact with each other and reduce the porosity, so that residual stress is generated at the contact points between the particles (storage of additional energy). This residual stress is a driving force for the migration and densification of the solid phase diffusion material during the sintering process. The powder is not compacted by cold forming. Even if sintered at a very high temperature, the den

Turbocharging is a technology that uses the exhaust gas generated by the operation of the internal combustion engine to drive the air compressor. Its main function is to increase the intake air volume of the engine, thereby increasing the power and torque of the engine. After the engine is mounted on the turbocharger, High power can increase by 40% or higher. Japanese auto companies took the lead in using metal turbochargers on various vehicles in 1978. However, one of the main drawbacks of metal turbochargers is that acceleration response is not enough to overcom

A large number of experiments have proved that the "ball" in the precision bearing operating at high speed (speed above 4×104r/min) is the weakest part in the bearing, and about 60%-70% of the high-speed bearing failure is caused by the steel ball. Produced by varying degrees of fatigue. Many domestic high-speed bearings have problems such as bearing steel balls with different degrees of fatigue damage. In order to improve the performance of high-speed bearings to prolong their fatigue life, the application of structural ceramics at home and abroad to manufacture

1 Smaller density, less centrifugal force - more conducive to high speed operation The density of silicon nitride ceramic material is about 3.2 × 103kg / m3, while the density of bearing steel is about 7.8 × 103kg / m3. The density of silicon nitride ceramics is only about 40% of the density of bearing steel. Therefore, when the rolling element is made of a silicon nitride ceramic, the bearing can effectively suppress an increase in the rolling element load caused by the centrifugal force at a high speed rotation. Therefore, the use of low-density silicon nitrid

The 96 alumina ceramic substrate is a ceramic widely used in structural ceramics. Because of its excellent electrical properties at high frequencies, it has low dielectric loss, large volume resistivity, high strength, high hardness, small coefficient of linear expansion, and good wear resistance and heat resistance. 1. High hardness It has been determined by the Shanghai Institute of Ceramics of the Chinese Academy of Sciences to have a Rockwell hardness of HRA80-90, which is