Silicon Nitride Ceramic Material

Silicon nitride ceramic is an inorganic material ceramic that does not shrink when sintered. Silicon nitride is very strong, especially hot-pressed silicon nitride, which is one of the hardest substances in the world. It has high strength, low density, high temperature resistance and other properties. Si3N4 ceramics is a covalent bond compound, the basic structural unit is [SiN4] tetrahedron, the silicon atom is located in the center of the tetrahedron, and there are four nitrogen atoms around it, which are respectively located at the four vertices of the tetrahedron, and then every three Each tetrahedron shares the form of an atom, forming a continuous and solid network structure in three-dimensional space. Its hardness is second only to diamond and cubic boron nitride, and it has excellent wear resistance and compression performance, while silicon nitride is one of the materials with the most such characteristics among ceramic materials. It comes in dark gray or black and has a mirror-like finish when polished. Commonly used in main engines of space shuttles, military missiles, and gyroscopes. The ultra-hardness of silicon nitride makes it a primary material for bearings in products such as marine fish reels, bicycle racing, skates, skateboards, and more.