Introduction to the application and development of silicon carbide ceramics in industrial ceramics

Silicon carbide ceramics is a kind of super wear-resistant and high-temperature resistant ceramics. In recent years, many researchers have done great research on the application of silicon carbide and its application in industrial ceramics. Here, Kezhong Ceramics Factory takes you to understand the development and application of silicon carbide ceramics.

In the 21st century, with the development of science and technology, information, energy, materials and bioengineering have become the four pillars of the development of social productive forces. Silicon carbide has developed rapidly in the field of materials because of its stable chemical properties, high thermal conductivity, low thermal expansion coefficient, low density, good wear resistance, high hardness, high mechanical strength and chemical corrosion resistance. Silicon carbide ceramics are widely used in ceramic ball bearings, valves, semiconductor materials, gyroscopes, measuring instruments, aerospace and other fields because of their low density, low thermal expansion coefficient, high hardness, high temperature resistance, high elastic modulus and corrosion resistance.

Silicon carbide is dominated by covalent bonds, accounting for about 88%. The basic structure of the lattice is SiC4 and CSi4 tetrahedrons interspersed with each other. SiC has α And β Two crystal forms, when the temperature is lower than 1600℃, SiC is β -SiC exists, when it is higher than 1600℃, β -SiC is transformed into α -SiC form. Silicon carbide ceramics play an indispensable role in modern industry. Table 1 lists its uses in detail.

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