The main raw material of ceramic valves is the small deformation of the ceramic material, which has much higher bonding strength than the metal. Under normal circumstances, the crystal ion radius of the constituent ceramic materials is small, and the ion price is high and the coordination number is large. These properties determine the ceramics. The tensile strength, compressive strength, elastic modulus, and hardness of the material are all very high. The "brittleness" and difficult processing of ceramics have limited its application range. In the past ten years, due to the development and progress of martensitic transformation toughening technology, composite material technology and nano-ceramic concepts, the "brittleness" of ceramics has been made. "It has been greatly improved, its toughness and strength have been greatly improved, and its application range has been continuously expanded." Ceramic valves make full use of the wear resistance and corrosion resistance of ceramics, because they can be sold in the market.