The development history and physical and chemical properties of boron nitride BN

Boron nitride came out more than 100 years ago. The earliest application was hexagonal boron nitride as a high-temperature lubricant. Not only its structure but also its properties are very similar to graphite, and its own whiteness, so it is commonly known as white graphite.

Boron nitride (BN) ceramics is a compound discovered as early as 1842. A lot of research work has been done on BN materials abroad since the Second World War, and it was not developed until 1955 after the BN hot pressing method was solved. The American Diamond Company and Union Carbon Company were the first to put into production, and in 1960 they had produced more than 10 tons.

In 1957, R·H·Wentrof was the first to successfully trial-produce CBN. In 1969, General Electric Company sold the product as Borazon. In 1973, the United States announced the production of CBN tools. In 1975, Japan imported technology from the United States and also produced CBN tools.

In 1979, the pulsed plasma technology was successfully used to prepare a collapsed c-BN film at low temperature and low pressure for the first time.

At the end of the 1990s, people have been able to use a variety of physical vapor deposition (PVD) and chemical vapor deposition (CVD) methods to prepare c-BN films.

From the perspective of China, the development is advancing by leaps and bounds. The research on BN powder began in 1963, was successfully developed in 1966, and was put into production in 1967 and used in my country's industry and cutting-edge technology.

The physical and chemical properties of boron nitride Product

CBN is usually black, brown or dark red crystals with a zinc blende structure with good thermal conductivity. Hardness is second only to diamond, it is a super hard material, often used as tool materials and abrasives. 

Boron nitride has chemical resistance properties and is not corroded by inorganic acids and water. The boron-nitrogen bond is broken in the hot concentrated alkali. Above 1200℃, it will start to oxidize in the air. It begins to decompose 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 it can reach 2800°C in an inactive reducing atmosphere, but the lubrication performance is poor at room temperature. Most of the properties of boron nitride are better than carbon materials. For hexagonal boron nitride: low friction coefficient, good high temperature stability, good thermal shock resistance, high strength, high thermal conductivity, low expansion coefficient, high resistivity, corrosion resistance, microwave or transparent Infrared.

Overview of Boron Nitride NB Product

Hexagonal boron nitride crystals, the most common is graphite lattice, 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 type boron nitride (w-BN). People have even discovered two-dimensional boron nitride crystals like graphene.

Boron nitride industrial powder is a pure white ceramic material with a hexagonal crystal structure similar to graphite. Boron nitride can withstand temperatures exceeding 2000°C, and depending on the brand, its dielectric strength is close to 1000 volts/mil. Boron nitride is hot-it is pressed as a blank and can be easily processed into bars, bars, plates and even custom shapes.

Application of Boron Nitride NB Product

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

2. Special electrolytic and resistance materials under high temperature conditions.

3. High-temperature solid lubricants, extrusion anti-wear additives, ceramic composite materials production additives, refractory materials and antioxidant additives, especially additives resistant to molten metal corrosion, heat-resistant additives, high-temperature insulating materials.

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

5. Compressed into various shapes of boron nitride products, which can be used as high temperature, high pressure, insulation and heat dissipation parts.

6. Aerospace thermal shielding materials.

7. With the participation of catalysts, it can be converted into cubic boron nitride with hardness like diamond after high temperature and high pressure treatment.

8. The structural materials of the atomic reactor.

9. Airplane and rocket engine nozzles.

10. High-voltage and high-frequency electrical insulators and plasma arc insulators.

11. Packaging materials to prevent neutron radiation.

12. The superhard materials made by boron nitride processing can be made into high-speed cutters and drill bits for geological exploration and oil drilling.

13. Metallurgical continuous casting steel isolation ring, amorphous iron launder, continuous casting aluminum mold release agent (various optical glass mold release agents)

14. Make various evaporation boats for capacitor film aluminum plating, picture tube aluminum plating, display aluminum plating, etc.

15. Various fresh-keeping aluminum-plated packaging bags, etc.

16. All kinds of laser anti-counterfeiting aluminum plating, brand hot stamping materials, all kinds of cigarette labels, beer labels, packaging boxes, cigarette packaging boxes, etc.

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

Boron Nitride NB Product Price

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

Boron Nitride NB Product Supplier

As a global boron nitride NB Product supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering 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.