Silicon Nitride (SiC) Ceramic:

SiC ceramics not only have excellent mechanical properties at room temperature, such as high flexural strength, excellent oxidation resistance, good corrosion resistance, high wear resistance and low friction coefficient, but also high temperature mechanical properties (strength, creep resistance). Etc.) is the best among known ceramic materials. Hot pressing sintering, pressureless sintering, hot isostatic pressing, the high temperature strength can be maintained up to 1600 ° C, which is the best material for high temperature strength in ceramic materials. Oxidation resistance is also the best of all non-oxide ceramics. Alias Emery. Silicon carbide (SiC) is a compound with strong covalent bond, and its Si--C bond has an ionic form of only about 12%. Therefore, it also has excellent mechanical properties, excellent oxidation resistance, and high abrasion resistance. Low coefficient of friction, etc. The biggest characteristic of silicon carbide is high temperature strength. The strength of ordinary ceramic materials will be significantly reduced at 1200~1400 degrees Celsius, while the flexural strength of silicon carbide at 1400 degrees Celsius will remain at a high level of 500~600MPa, so its working temperature can be Up to 1600 ~ 1700 degrees Celsius. In addition, the thermal conductivity of silicon carbide ceramics is also higher, second only to yttria ceramics in ceramics. Therefore, silicon carbide has been widely used in high temperature bearings, bulletproof plates, nozzles, high temperature corrosion resistant parts, and high temperature and high frequency range electrons. Equipment parts and other fields.