The above few articles have shown you some of the properties and advantages of silicon nitride ceramics. Silicon carbide has a different composition element from silicon nitride, which leads to their different properties. Next, let’s learn about silicon carbide ceramics and ceramic rings made of silicon carbide.
Silicon carbide (SiC) ceramics have excellent characteristics such as strong oxidation resistance, good resistance to solar radiation, high hardness, good thermal stability, high high temperature strength, small coefficient of thermal expansion, high thermal conductivity, thermal shock resistance and chemical corrosion resistance. Ceramic rings made of silicon carbide also possess various excellent properties of silicon carbide ceramics
Therefore, it has already demonstrated its skills in fields such as petroleum, chemical engineering, machinery, aerospace, nuclear energy, and is increasingly receiving people’s attention. Structural ceramic processing can be carried out according to customer requirements. For example, SiC ceramics can be used as various bearings, balls, nozzles, seals, cutting tools, gas turbine blades, turbocharger rotors, reflective screens, and rocket combustion chamber liners. And structural ceramic processing can be carried out according to customer requirements.
The excellent properties of SiC ceramics are closely related to their unique structure. SiC is a compound with strong covalent bond, and the ionicity of Si-C bond in SiC is only about 12%. Therefore, SiC has high strength, large elastic modulus, and excellent wear resistance. Pure SiC will not be corroded by acidic solutions such as HCI, HNO3, H2SO4, HF, and alkaline solutions such as NaOH. When heated in the air, oxidation is prone to occur, but the SiO2 formed on the surface during oxidation inhibits further diffusion of oxygen, so the oxidation rate is not high. In terms of electrical performance, SiC has semiconductor properties, and the introduction of a small amount of impurities will exhibit good conductivity. In addition, SiC also has excellent thermal conductivity.
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