Definition of boron nitride


Hexagonal boron nitride (h-BN) is a hexagonal mesh layer structure crystal composed of nitrogen and boron atoms. It is the only phase structure of boron nitride existing in nature. Its appearance is a soft, loose, smooth, and moisture-absorbent white powder with layered structure characteristics similar to graphene, also called "white stone ink." Hexagonal boron nitride (h-BN) is a kind of synthetic inorganic material that has a variety of excellent properties; it is more and more widely used in a variety of new technology and new products, improving the technical level of modern industry, promoting the new material industry to more profound and broader fields of development. From the molecular structure diagram, hexagonal boron nitride belongs to the hexagonal crystal system, which has the same hexagonal crystal structure as graphene. Multiple layers stack it, and the van der Waals force links the B-N-B between different layers. Its lattice constant a=0.2506±0.0002nm and c=0.667±0.0004nm. Density ρ=2.25g/cm. Hexagonal boron nitride is very stable in air, has a wide band gap (5.1eV), can tolerate a high temperature of 2270, and will sublimate at about 3000. At the same time, hexagonal boron nitride has good insulation, thermal conductivity, and chemical stability, low thermal expansion/shrinkage, and weak acids and strong bases at room temperature do not react. Hexagonal boron nitride and its composite ceramic products. At present, hexagonal boron nitride composite ceramic materials are mainly used in the vacuum coating industry, such as vacuum aluminized evaporation boats, capacitor metallization vacuum coating, screen coating, etc. If you are looking for high quality, high purity and cost-effective boron nitride, or if you require the latest price of boron nitride, please feel free to email contact mis-asia.

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