Basic performance characteristics: high strength and hardness; High temperature resistance; High creep resistance; Good corrosion resistance and insulation. The disadvantages are high brittleness, high hardness, low friction coefficient, self-lubrication and wear resistance, high creep resistance, low thermal expansion coefficient and good thermal shock resistance; Good chemical stability, excellent electrical insulation, high high temperature strength and good thermal conductivity; Its stability, creep resistance, wear resistance and corrosion resistance are good; Radiation-resistant elements have good radiation heat resistance and thermal conductivity, low expansion coefficient, good thermal shock resistance and thermal stability; Good high-temperature insulation, chemical stability, self-lubrication and wear resistance. It is made of metal oxide (Al2O3, etc.). ) or carbide (such as TiC, WC, TaC, etc.). ) powder, and then add a proper amount of binder (such as cobalt, chromium, nickel, iron, molybdenum, etc.). ) by powder metallurgy. Ceramics with certain metal properties are important materials for manufacturing general accessories, molds and wear-resistant parts.