Boron nitride powder 10043-11-5

graphite

BN=24.18, melting point：3000℃, density：2.25g/cm3, appearance is white loose powder, soft and smooth texture, similar to graphite in nature, belongs to hexagonal crystal system, flake structure. Therefore, it is called "white graphite". This product has good electrical insulation, thermal conductivity, chemical resistance and lubricity, and has a strong neutron absorption capacity, which is stable to almost all organic solvents and corrosive chemicals; hexagonal boron nitride It is chemically inert to almost all molten metals, and various physical and chemical properties remain basically unchanged below 1,000°C in the air; it is still stable at 3,000°C in an inert gas. Hexagonal boron nitride powder becomes a white block after hot pressing and sintering, which is easy for mechanical processing, and its temperature resistance can be as high as 2,000°C. HC grade products are sintered at 1600-1800℃, medium crystallization, excellent high temperature resistance and oxidation resistance. Its original particle size is small, and the agglomeration particle size is large. Because the particles are spherical, they are especially suitable for fillers, casting molding and injection molding demoulding Agents and composite ceramics are also easy to form by hot pressing. HN grade products are sintered at 1800-2000℃, and the performance reaches or approaches the advanced level of similar foreign products. HN grade products are particularly suitable for high-voltage switch nozzles because of their particle size similar to PTFE and uniform particle size; at the same time; Due to its superior thermal conductivity