Boron nitride is resistant to chemical attack and is not eroded by inorganic acid and water. In a hot concentrated base, the boron nitrogen bond is broken. Above 1200℃ begins to oxidize in the air. The melting point is 3000℃; slightly below 3000℃ begins to sublimate. Decomposition begins at about 2700℃ under vacuum—somewhat soluble in hot acid, insoluble in cold water, relative density 2.25. The compression strength is 170MPa. The maximum operating temperature is 900℃ in the oxidizing atmosphere, and it can reach 2800℃ in the inactive reducing atmosphere, but the lubrication performance is poor at room temperature. Most properties of boron carbide are superior to those of carbon materials.
For hexagonal boron nitride: very low friction coefficient, high-temperature stability, good heat shock resistance, high strength, high thermal conductivity, low expansion coefficient, very high resistivity, corrosion resistance, microwave or infrared penetration. According to the material properties, the role and application of boron nitride in many fields: 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. Synthesis of cubic boron nitride. Cubic boron nitride is synthesized by high temperature and high-pressure method with hexagonal boron nitride as raw material. Its hardness is second only to diamond, and its thermal stability and chemical inertness are better than diamond—coating materials and lubricants industry. Hexagonal boron nitride has excellent lubrication properties, low friction coefficient, and excellent self-lubrication performance, especially at high temperatures still has excellent self-lubrication, so it is widely used in coating materials, releases agents, and the lubricants industry. The cosmetics industry. Adding a certain proportion of hexagonal boron nitride into cosmetics can increase the adhesion and hiding power of cosmetics but also can make the product firm, easy to apply, and easy to clean and remove—other industries. In the high-voltage electrical appliance industry, boron nitride and polytetrafluoromaterial combined effect as an insulation material are used in the high-voltage switch; The heat and corrosion resistance of hexagonal boron nitride can also be used to make high-temperature components and rocket combustion chamber lining. 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.