Silicon Nitride (Si3N4), just like its close family relation silicon carbide, is one of the toughest technical ceramics available. Over the years it has been successfully used in a wide and interesting field of applications ranging from automotive engine components to roller bearings for the most exclusive skateboards.Silicon Nitride ceramic is hard, solid substance, that can be obtained by direct reaction between silicon and nitrogen at high temperatures. si3n4 ceramic is the main component in silicon nitride ceramics, which have relatively good shock resistance compared to other ceramics

In the field of metallurgy,silicon nitride as a new refractory materials is used in metallurgical furnace body,furnace mouth sealing, ironmaking furnace outlet, steel making industry etc.In the machinery industry, It is used as ball bearings, roller, ball seat, tooling, new ceramic tool, piston pump, spindle sealing materials etc.In the chemical industry, silicon nitride ceramics is used as wear resistant, corrosion resistant components, such as ball valve, pump body, burning carburetor, filter, etc.si3n4 ceramics have been widely used in the field of electronics, military and nuclear industry.