At present, the valves commonly used in the production of various industries in China are metal valves. The use of metal valves has been in the history of hundreds of years. Although the structure and materials have been improved, they are increasingly unable to adapt to harsh conditions such as severe wear and strong corrosion, which are mainly reflected in the short service life and large leakage affecting the stability of the system operation. Traditional metal valves are in urgent need of radical innovation in materials, design and manufacturing processes.

As a new material in the 21st century, advanced ceramic materials have been valued by more and more scientists, and its application to industrial valves is a bold and beneficial innovation.

The ceramic material has a small deformation amount and a much higher bonding strength than the metal. Generally, the crystal ionic radius of the ceramic material is small, and the ion electricity price is high, and the coordination number is large. These properties determine that the tensile strength of the ceramic material, the compressive strength, modulus of elasticity and hardness turn very high. However, the "brittle" and difficult processing of ceramic itself limits its application range. In the past decade, due to the development and progress of martensitic transformation toughening technology, composite technology and nano-ceramic concept, the brittleness of ceramic material has been greatly solved as well as its toughness and strength have been greatly improved, and the scope of application has been continuously expanded.

In recent years, the application of new ceramic materials in petroleum, chemical, machinery and other fields is very active. The use of ceramic wear resistance and corrosion resistance to make wear-resistant and corrosion-resistant parts instead of metal materials is an important move in the high-tech materials market in recent years. The following key problems need to be solved in the application of ceramics: solving the problem of ceramic brittleness, improving the toughness of ceramics, controlling the shrinkage rate, improving the firing rate of ceramic materials, developing high-temperature kiln, developing ceramic processing equipment, and realizing precise compatibility of ceramic parts and metal valve bodies

Chinese valve manufacturers in various industries such as power, metallurgy, and chemical industries have extensive application of ceramic valves with great social and economic benefits:

1 . The high-tech new ceramic structural material is used to make the sealing parts and the wearing parts of the valve, which improves the wear resistance, corrosion resistance and sealing of the valve product, and greatly prolongs the service life of the valve.

2 . The use of ceramic valves can greatly reduce the number of repairs and replacements of valves, improve the safety and stability of the supporting equipment operating system, reduce the labor intensity of workers, and save equipment repair costs.

3 . The use of ceramic valves can improve the sealing of industrial piping systems, while at the same time maximizing the elimination of leakage, and will play an active role in promoting environmental protection.

4 . The raw materials for making ceramics are wide and the cost is low. Aluminum, carbon, silicon and the like can be used to produce ceramic materials with superior performance, which can save a lot of metal materials and rare mineral resources.

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