At present our country in the production of various commonly used for metal valve valve, metal valve used for hundreds of years of history, which although have also been structure and material improvement, but the metal material condition restriction, more and more can not adapt to high wear, strong corrosion and the needs of the bad working environment. Mainly manifests in the life short, leak serious greatly influence the stability of the system operation. The traditional metal valve need from material, design and manufacturing process of revolutionized. Advanced ceramic materials in the 21st century new materials, has been more and more attention of scientific workers, and the more you apply it in industrial valve is a bold and useful innovation.
Ceramic material deformation is very small, compared to metal has much higher bonding strength, usually composed of ceramic materials crystal ionic radius is small, and ion electricity price is high, the coordination number, these properties determine the ceramic material tensile strength, compressive strength, elastic modulus, hardness, etc are very high. However ceramic itself "fragile" and difficult processing limits its application scope, nearly ten years, because of the martensite phase transformation toughening technology, composite material science and technology and nano ceramic concept development and progress, has made ceramic "brittle" has been greatly improved and its toughness and strength has been greatly improved, application scope expanding.
In recent years, new ceramic materials in petroleum, chemical, machinery and other areas of application is very active, the use of ceramic wear resistance, corrosion resistance and corrosion production wear-resisting parts department instead of metal materials, is in last few years high technology material market is one of the important developing direction.
 

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