Ceramic material

1、 Zirconia

Zirconia (chemical formula: ZrO2) is the main oxide of zirconium. Usually, it is a white odorless and tasteless crystal, which is difficult to dissolve in water, hydrochloric acid and dilute sulfuric acid. It usually contains a small amount of hafnium dioxide. Its chemical properties are inactive, and it has the properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, which makes it an important high temperature resistant material, ceramic insulating material and ceramic shading agent

2、 Silicon nitride

Silicon nitride is an important structural ceramic material. It is a kind of superhard material with lubricity and wear resistance. It is an atomic crystal; Oxidation resistance at high temperature. Moreover, it can resist cold and heat shock, heat it to more than 1000 ℃ in the air, cool it sharply and then heat it sharply, and it will not break. It is precisely because silicon nitride ceramics have such excellent characteristics that people often use it to manufacture mechanical components such as bearings, gas turbine blades, mechanical seal rings, permanent molds and so on.

3、 Silicon carbide

Silicon carbide has great hardness, with Mohs hardness of 9.5, second only to the world's hardest diamond (Grade 10). It has excellent thermal conductivity. It is a semiconductor and can resist oxidation at high temperature. Stable chemical properties, high thermal conductivity, low thermal expansion coefficient and good wear resistance