The properties and application range of boron nitride

Boron Nitride Overview

Boron nitride is a crystal composed of nitrogen and boron atoms, with a chemical composition of 43.6% boron and 56.4% nitrogen. Boron nitride is a hexagonal crystal, 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.

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.

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 electrical resistivity, corrosion resistance, microwave or Infrared transparent.

Applications of Boron Nitride

1. Metal forming release agent and metal wire drawing lubricant.

2. Special electrolytic and resistance materials in high temperature state.

3. High temperature solid lubricants, extrusion antiwear additives, ceramic composite production additives, refractory and antioxidant additives, especially in the case of molten metal corrosion resistance, thermal enhancement additives, high temperature insulating materials.

4. Heat-sealing desiccant for transistors and additives for polymers such as plastic resins.

5. Boron nitride products pressed into various shapes can be used as high temperature, high pressure, insulation and heat dissipation components.

6. Aerospace heat shielding materials.

7. With the participation of catalyst, after high temperature and high pressure treatment, it can be converted into cubic boron nitride as hard as diamond.

8. Structural materials for atomic reactors.

9. Aircraft, rocket engine nozzles.

10. Insulators for high-voltage and 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. Metallurgical continuous casting steel separation ring, amorphous iron launder, continuous casting aluminum mold release agent (various optical glass mold release agents)

14. Make various kinds of capacitor film aluminum plating, picture tube aluminum plating, display aluminum plating and other evaporation boats.

15. All kinds of fresh-keeping aluminized packaging bags, etc.

16. Various laser anti-counterfeiting aluminum plating, brand bronzing materials, various cigarette labels, beer labels, packaging boxes, cigarette packaging boxes, etc.

17. The filler used for lipstick in cosmetics is non-toxic, lubricating and shiny.

In optical applications, c-BN films are suitable as surface coatings for some optical components due to their high hardness and high transmittance in the entire wavelength range from ultraviolet (about 200 nm) to far-infrared, especially for zinc selenide (ZnSe) , Zinc sulfide (ZnS) and other window materials coating. In addition, it has good thermal shock resistance and hardness, and is expected to be an ideal window material for high-power lasers and lasers. detector.

Boron nitride price

The price of boron nitride will change randomly with factors such as production cost, transportation cost, international situation, exchange rate and boron nitride market supply and demand. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for Boron Nitride, please feel free to send an inquiry for the latest price of Boron Nitride.

Boron Nitride Supplier

Tanki New Materials Co., Ltd., as a global supplier of boron nitride, has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (titanium nitride, silicon nitride, titanium nitride, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.