Hexagonal boron nitride powder

Boron nitride is a crystal composed of nitrogen atoms and boron atoms. The chemical formula is BN. The molecular weight is 24.84. The crystal structure of hexagonal boron nitride (HBN) powder is similar to that of graphite layer structure, showing loose, lubricated, easy moisture absorption, light weight and other properties of white powder. Its structure and performance are very similar to graphite, because of its excellent lubricity and wear resistance, commonly known as "white stone ink".
Hexagonal boron nitride has good electrical insulation, thermal conductivity, chemical stability; Theoretical density 2.29g/cm3, Mohs hardness 2, specific gravity 2.43, no obvious melting point, at 0.1MPA nitrogen at 3000℃ sublimation, in inert gas melting point 3000℃, in neutral reducing atmosphere, heat resistance to 2000℃, nitrogen and argon use temperature up to 2800℃, poor stability in oxygen atmosphere. The operating temperature is below 1000℃. Hexagonal boron nitride has the same expansion coefficient as quartz, but its thermal conductivity is ten times that of quartz.