Introduction to Silicon alumina c799 Nitride Ceramics:
Silicon nitride is a new type of ceramic material, is a gray-white solid, and silicon carbide has a high degree of thermal stability and chemical stability, friction coefficient is only 0.1 ~ 0.2, equivalent to the lubrication of the metal surface, hardness is second only to diamond and cubic boron nitride.
Its largest field of application is also as a high-temperature 7g Ozone Generator structural ceramic material. A small amount of aluminum trioxide is added to silicon nitride to make a new type of ceramic, the trade name of which is sialon.Selong ceramic has been widely used in gas turbine blades, machine housings, engine components, rocket tail nozzles, bearings and cutting tools.
Performance: inorganic materials that do not shrink when sintering, small coefficient of thermal expansion and extremely resistant to high temperatures, strength can be maintained to a high temperature of 1200C without decreasing, thermal shock stability is excellent and has amazing chemical resistance, can withstand almost all inorganic acids and less than 30% of caustic soda solutions, is a high-performance electrical insulation material.
Advantages: good resistance to cold and thermal shock performance, heating to 10g Ozone Generator more than 1000C in the air, sharp cooling and then sharp heating, will not break, compared to alumina is not easy to transfer heat.
Disadvantages: low fracture toughness coefficient, mechanical strength in ceramics belongs to the middle and lower, easy to crack and fragile.
Applications: high temperature bearings, mechanical sealing 3500mg Ozone ceramic Plate rings, pipes and valves for electromagnetic pumps transporting aluminum molten, etc.