What is Boron Nitride? Boron nitride is a crystal composed of nitrogen atoms and boron atoms. The chemical composition is 43.6% boron and 56.4% nitrogen with four different variants: hexagonal boron nitride (HBN), rhombohedral boron nitride (RBN), cubic boron nitride (CBN) and wurtzite nitrogen Boronide (WBN). What is the characteristics of Boron Nitride? Boron nitride is chemically resistant and not attacked by inorganic acids and water. The boron-nitrogen bond is broken in hot concentrated alkali. Above 1200℃, it begins to oxidize in air. Decomposition begins at about 2700°C under vacuum. Slightly soluble in hot acid, insoluble in cold water, relative density 2.29. The compressive strength is 170MPa. The maximum operating temperature is 900 °C in an oxidizing atmosphere, and can reach 2800 °C in an inactive reducing atmosphere, but the lubricating performance is poor at room temperature. Most of the properties of boron nitride are better than carbon materials. For hexagonal boron nitride: low coefficient of friction, good high temperature stability, good thermal shock resistance, high strength, high thermal conductivity, low coefficient of expansion, high resistivity, corrosion resistance, microwave or Infrared transparent. The different structures of Boron Nitride Cubic boron nitride(CBN) is usually black, brown or dark red crystals with a sphalerite structure and good thermal conductivity. The hardness is second only to diamond, and it is a superhard material that is often used as tool material and abrasive. Hexagonal boron nitride(HBN), most commonly a graphite lattice, and there are also amorphous variants. In addition to the hexagonal crystal form, boron nitride has other crystal forms, including: rhombohedral boron nitride (r-BN), cubic Boron nitride (c-BN), wurtzite boron nitride (w-BN). Two-dimensional boron nitride crystals like graphene have even been found.
The main applications of Boron Nitride 1. Release agent for metal forming and lubricant for metal wire drawing. 2. Special electrolytic and resistance materials in high temperature state. 3. High-temperature solid lubricants, extrusion anti-wear additives, additives for the production of ceramic composite materials, refractory materials and anti-oxidation additives, especially in the case of anti-corrosion of molten metal, heat-enhancing additives, high-temperature-resistant insulating materials. 4. Heat-sealing desiccant for transistors and additives for polymers such as plastic resins. 5. Pressed into various shapes of boron nitride products, can be used as high temperature, high pressure, insulation, heat dissipation parts. 6. Heat shielding materials in aerospace. 7. With the participation of catalyst, it can be converted into cubic boron nitride as hard as diamond after high temperature and high pressure treatment. 8. Structural materials for atomic reactors. 9. The nozzles of aircraft and rocket engines. 10. Insulators for high-voltage high-frequency electricity and plasma arcs. 11. Packaging materials to prevent neutron radiation. 12. The superhard material processed by boron nitride can be made into high-speed cutting tools and drill bits for geological exploration and oil drilling. 13. Metallurgically used for the separation ring of continuous casting steel, the runner of amorphous iron, the mold release agent for continuous aluminum casting (various optical glass release agents). 14. Make various evaporation boats for capacitor film aluminum plating, picture tube aluminum plating, display aluminum plating, etc. 15. All kinds of fresh-keeping aluminized packaging bags, etc. High-quality Boron Nitride supplier Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional nitride powder supplier with over 12 years experience in chemical products research and development. We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality amorphous boron powder, please feel free to contact us and send an inquiry.
