Precision ceramics are also called “structure ceramics” or “engineering ceramics”.They are excellent in strength, hardness, insulation, heat conduction, heat resistance, oxidation resistance, corrosion resistance, wear resistance.Therefore, in very harsh working conditions,with the high stability and excellent mechanical properties.Precision ceramics consist of single or composite oxides or non oxides such as Al2O3,ZrO2,Si3N4,SiC,B4C and other ceramic materials.They are made into kinds of parts with special shapes and are widely used in Aerospace,Mechanics,Energy,Automobile and other high tech industries.