As a kind of inorganic non-metallic material, special ceramic material has many properties that metal material does not have, such as: high strength, high hardness, high elastic modulus, high temperature resistance, wear resistance, corrosion resistance, oxidation resistance, heat shock resistance.
In addition to the current ceramic molding process has been mature, ceramic materials can be made according to the needs of various non-standard shape parts, replace metal parts as the key parts. From the perspective of aerospace and military, the heat-resistant performance of special ceramics can be used in the heat insulation tiles of the space shuttle, warheads of intercontinental missiles and rocket nozzle parts. For civil use is also quite wide, such as commonly used engine combustion chamber, piston top, rotor, corrosion resistance impeller, wear-resisting pipe, bearing, sleeve, ball valve, seals, screws... There are many areas in which metal parts can be replaced.