Silicon Nitride Powder SiN

Silicon nitride is very strong, especially hot-pressed silicon nitride, which is one of the hardest substances in the world. It is extremely resistant to high temperatures, and its strength can be maintained until a high temperature of 1200 °C without dropping, and it will not melt into a melt after being heated, and it will not decompose until 1900 °C, and it has amazing resistanceChemical corrosionperformance, ability to withstand almost everythingInorganic acidsand less than 30% caustic soda solution, can also resist the corrosion of many organic acids; At the same time, it is a high-performance electrical insulating material.

Silicon nitride - properties Chemical formula Si3N4 white powdery crystals; Melting point 1900 °C, density 3.44 g/cm (20 °C); There are two variants: the α type is hexagonalDensely packed structure; The β type is a spar-like structure. Silicon nitride is gray when there are impurities or excess silicon.

Silicon nitride ceramics have the characteristics of high strength and high temperature resistance, and have the best comprehensive mechanical properties among ceramic materials, such as thermal shock resistance, oxidation resistance, wear resistance and corrosion resistance, and are the first candidate materials for ceramics for heat engine parts. In the machinery industry, silicon nitride ceramics are used as bearing balls, rollers, ball seat rings, tooling tools, new ceramic cutters, pump plungers, mandrel sealing materials, etc.

In the chemical industry, silicon nitride ceramics are used as wear-resistant, corrosion-resistant components. Such as ball valves, pump bodies, combustion vaporizers, filters, etc.

In the metallurgical industry, silicon nitride ceramics have self-lubrication due to high temperature resistance, small friction coefficient. It is stable to most metals and alloy solutions, so it can be used to make tools and dies for metal material processing, such as dial mandrels, extrusions, wire dialing dies, rolls, conveyor rollers, heating element fixtures, thermocouple sets, metal heat treatment supports, crucibles, and aluminumLiquid conductionbattalion, aluminum clad lining, etc.