Boron nitride and its development history

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What’s boron-nitride? Boron Nitride is a crystal made of nitrogen and boron. With four variants of boron-nitride: hexagonal, rhombohedral and cubic boron nutrides (RBN), cubic and cubic boron triides (CBN), as well as wurtzite Boron (WBN), the chemical composition is 43.6% and 56.4% boron.
Development history of boron Nitride
Boron nitride More than 100 years have passed since its invention. It was used in high-temperature lubricants as hexagonal boron nutride. Because its structure, properties and whiteness are almost identical to graphite it is also commonly called white graphite.
Boron nitride ceramics (BN), was first discovered back in 1842. Since the Second World War, a lot has been accomplished on BN materials. However, it wasn’t developed until 1955 when the hot pressing technique was perfected. American Diamond Company was the first company to start production. In 1960, they produced over 10 tons.
R*H*Wentrof produced CBN in 1957. General Electric Company sold Borazon as a product in 1969. CBN tools were first announced by the United States in 1973.
Japan imported CBN tools from the United States in 1975.
A pulsed plasma technology, which was first used in 1979 to make a collapsed film of cBN at low temperature under low pressure, was successful.
To prepare cBN films, there were many methods available at the end of 1990.
China sees development as a leap and bounds. The initial research for BN powder started in 1963. A successful development in 1966 led to a production run in 1967. This was then used by my country in its industry and the cutting-edge technology.

Physical and chemical characteristics of Boron Nitride
Physical properties
CBN crystals are usually dark brown, black or deep red with a zinc mix structure and high thermal conductivity. CBN is hardier than diamond and used in a variety of tools, abrasives, and other uses.
Boron Nitride is chemically inert and can be corroded with water and organic acids. Hot concentrated alkali breaks the boron/nitrogen bond. The boron-nitrogen bond will be broken in hot concentrated alkali. Above 1200 it will begin to oxidize. In a vacuum it will begin to decompose around 2700 degC. The relative density is 2.29. It’s slightly soluable in hot acid but not in cold water. The compressive strength of the product is 170MPa. Maximum operating temperature in an oxidizing environment is 900°C, while it can rise to 2800°C in an inactive reduce atmosphere. But, the performance of the lubricant at room temperatures is not as good. The majority of properties of boron-nitride outperform carbon materials. The hexagonal boron-nitride has a low friction coefficient and good temperature stability. It also offers high heat resistance, thermal shock resistance, high strength and low thermal conductivity.
Material structure
There are many hexagonal boron-nitride crystals. The most well-known is graphite. But there are also other crystal forms. These include rhombohedral and cubic boron nuitride. Boron nitride (c-BN), wurtzite type boron nitride (w-BN). Even graphene-like two-dimensional crystals of boron nutride have been found.
Boron Nitride is used
1. Use metal forming mold release agent or metal wire drawing oil.
2. Under high temperatures, special resistance and electrolytic materials
3. The high-temperature extrusion-resistant additives and extrusion-anti-wear additives as well as additives for ceramic composite materials are suitable.
4. For transistors, heat sealing desiccant and for additives in polymers, such as plastic resins.
5. Use to press into different shapes of Boron Nitride Products, including insulation parts and heat dissipation pieces.
6. Materials for thermal protection in aerospace.
7. After high temperature treatment and high-pressure treatment, the catalyst can convert it into cubic bore nitride.
8. These are the structural materials for an atomic nuclear reactor.
9. For airplanes or rocket engines, nozzles
10. Insulator for plasma arc, high-voltage electricity, and high frequency electricity
11. Materials to stop neutron radiation.
12. These superhard materials, which are made from boron Nitride can be turned into drill bits and high-speed cutters for drilling oil wells.
13. This is used in metalurgical processes for the Isolating Ring of Continuous Cast Steel, the Laundering of Amorphous Iron and as the Release Agent of Continuous Cast Aluminum (various optical-glass release agents).
14. For aluminum plating different capacitor films and aluminum plating picture tubes or displays, we produce evaporation tanks.
15. All types of fresh-keeping, aluminum-plated packaging bags
16. You can get all kinds of anti-counterfeiting laser plating and brand hot stamping material, all kinds cigarette labels, beer label, packaging boxes, cigarette box packaging, etc.
17. Lipstick fillers are non-toxic, shiny, and lubricious.

Lempotee (aka. Lempotee advanced materials Nano Technology Co. Ltd. (aka. Boron Nitride manufactured by our company is of high purity and fine particles. Thank you Please contact us if necessary.

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