What is boron-nitride?
Boron Nitride is a crystal made of nitrogen atoms, boron atoms. The chemical composition of Boron nitride is 43.6% Boron and 56.4% Nitrogen. There are four types: hexagonal boron Nitride, rhombohedral Borion Nitride (RBN), cubic boren nitride [CBN], and wurtzite Boron (WBN).
The development of boron-nitride
Boron nitride More than 100 years have passed since its invention. It was used in high-temperature lubricants as a hexagonal boron nutride. Its structure, as well as its properties, are very similar to graphite. This is why it is also commonly known by the name white graphite.
Boron Nitride (BN) ceramics was first discovered in 1842. Since the Second World War, a lot has been done abroad on BN materials. It was not developed until 1955 after the BN hot-press method was invented. American Diamond Company, Union Carbon Company and others were the first to start production. In 1960 they had produced over 10 tons.
R*H*Wentrof produced CBN in 1957. General Electric Company sold Borazon as a product in 1969. 1973 saw the United States announce the production of CBN-tools.
Japan imported technology and CBN tools from the United States in 1975.
In 1979, the first successful use of the pulsed Plasma technology to prepare a c-BN film collapsed at low temperature and pressure was made.
To prepare cBN films, people were able use several methods of chemical vapor deposit (CVD), as well as physical vapor vapor (PVD), at the end the 1990s.
China sees development as a leap and bound. The initial research on BN powder started in 1963. It was then developed successfully in 1966. It was finally put into production by 1967.
The chemical and physical properties boron nitride
Physical properties
CBN crystals are usually dark brown or red with a zinc mix structure and good thermal conductivity. CBN is hardier than diamond and is used in a variety of applications, including as abrasives and tool materials.
Boron Nitride is chemically inert and can be corroded by water and organic acids. The hot concentrated alkali breaks the boron/nitrogen bond. Above 1200 it will begin to oxidize. It starts to decompose around 2700°C in a vacuum. It is slightly soluable in hot acid but insoluble when dissolved in cold water. The relative density is 2.29. The compressive strength is 170 MPa. The maximum operating temperature in an oxidizing environment is 900degC, while it can reach 2800degC when inactively reducing. However, the lubrication performance at room temperature is poor. The majority of the properties of Boron Nitride are superior to those of carbon materials. Hexagonal Boron Nitride has a low friction coefficient and good high-temperature stabilities. It also has high thermal shock resistance.
Material structure
Hexagonal graphite nitride crystals are the most popular. There are also amorphous forms. In addition to hexagonal crystals, boron nuitride also has other crystal forms such as cubic rhombohedral and boron Nitride (r-BN). Boron nitride (c-BN), wurtzite type boron nitride (w-BN). Even graphene-like two-dimensional boron nutride crystals were discovered by people.
Boron Nitride is used
1. Metal forming mold release agents and metal wire draw lubricant.
2. Special electrolytic and resistant materials for high temperatures
3. Extrusion antiwear additives, high-temperature liquid lubricants, additives to the production of ceramic composite material, and antioxidation additives are all suitable for situations that resist corrosion of molten metallics, heat-increasing and high temperature insulating materials.
4. Heat-seal desiccant to be used in transistors and as an additive for polymers, such as plastic resins.
5. Pressed into a variety of boron Nitride products. They can be used for insulation and heat dissipation purposes.
6. Aerospace thermal shielding materials
7. After high-temperature treatment and high pressure, the catalyst can convert it into cubic boron nutride with diamond-like hardness.
8. The structural materials used in the atomic bomb.
9. Nozzles for rocket engines and planes.
10. Insulator for high voltage and high frequency electricity, plasma arc.
11. Packaging materials that prevent neutron radiation
12. The superhard materials made by boron Nitride can be turned into high-speed cutters, drill bits and other tools for exploration and drilling.
13. It is used in metallurgy to make the isolating circle of continuous cast steel, the laundering of amorphous metal, and the release agent for continuous casting aluminum (various glass release agents).
14. Production of evaporation vessels for aluminum plating various capacitor films, aluminum plate of picture tubes, aluminum plating, etc.
15. All types of aluminum-plated fresh-keeping packaging bags,
16. All types of laser anti-counterfeiting aluminiu plating, brand heat stamping materials and all kinds of cigarettes labels, beer labels packaging boxes, cigarette packaging box, etc.
17. Lipstick filler in cosmetics is safe, non-toxic and shiny.
(aka. Technology Co. Ltd. (aka. Our Boron Nitride has high purity, fine particle sizes, and low impurities. Please Please contact us if necessary.
The development of boron-nitride
Boron nitride More than 100 years have passed since its invention. It was used in high-temperature lubricants as a hexagonal boron nutride. Its structure, as well as its properties, are very similar to graphite. This is why it is also commonly known by the name white graphite.
Boron Nitride (BN) ceramics was first discovered in 1842. Since the Second World War, a lot has been done abroad on BN materials. It was not developed until 1955 after the BN hot-press method was invented. American Diamond Company, Union Carbon Company and others were the first to start production. In 1960 they had produced over 10 tons.
R*H*Wentrof produced CBN in 1957. General Electric Company sold Borazon as a product in 1969. 1973 saw the United States announce the production of CBN-tools.
Japan imported technology and CBN tools from the United States in 1975.
In 1979, the first successful use of the pulsed Plasma technology to prepare a c-BN film collapsed at low temperature and pressure was made.
To prepare cBN films, people were able use several methods of chemical vapor deposit (CVD), as well as physical vapor vapor (PVD), at the end the 1990s.
China sees development as a leap and bound. The initial research on BN powder started in 1963. It was then developed successfully in 1966. It was finally put into production by 1967.
The chemical and physical properties boron nitride
Physical properties
CBN crystals are usually dark brown or red with a zinc mix structure and good thermal conductivity. CBN is hardier than diamond and is used in a variety of applications, including as abrasives and tool materials.
Boron Nitride is chemically inert and can be corroded by water and organic acids. The hot concentrated alkali breaks the boron/nitrogen bond. Above 1200 it will begin to oxidize. It starts to decompose around 2700°C in a vacuum. It is slightly soluable in hot acid but insoluble when dissolved in cold water. The relative density is 2.29. The compressive strength is 170 MPa. The maximum operating temperature in an oxidizing environment is 900degC, while it can reach 2800degC when inactively reducing. However, the lubrication performance at room temperature is poor. The majority of the properties of Boron Nitride are superior to those of carbon materials. Hexagonal Boron Nitride has a low friction coefficient and good high-temperature stabilities. It also has high thermal shock resistance.
Material structure
Hexagonal graphite nitride crystals are the most popular. There are also amorphous forms. In addition to hexagonal crystals, boron nuitride also has other crystal forms such as cubic rhombohedral and boron Nitride (r-BN). Boron nitride (c-BN), wurtzite type boron nitride (w-BN). Even graphene-like two-dimensional boron nutride crystals were discovered by people.
Boron Nitride is used
1. Metal forming mold release agents and metal wire draw lubricant.
2. Special electrolytic and resistant materials for high temperatures
3. Extrusion antiwear additives, high-temperature liquid lubricants, additives to the production of ceramic composite material, and antioxidation additives are all suitable for situations that resist corrosion of molten metallics, heat-increasing and high temperature insulating materials.
4. Heat-seal desiccant to be used in transistors and as an additive for polymers, such as plastic resins.
5. Pressed into a variety of boron Nitride products. They can be used for insulation and heat dissipation purposes.
6. Aerospace thermal shielding materials
7. After high-temperature treatment and high pressure, the catalyst can convert it into cubic boron nutride with diamond-like hardness.
8. The structural materials used in the atomic bomb.
9. Nozzles for rocket engines and planes.
10. Insulator for high voltage and high frequency electricity, plasma arc.
11. Packaging materials that prevent neutron radiation
12. The superhard materials made by boron Nitride can be turned into high-speed cutters, drill bits and other tools for exploration and drilling.
13. It is used in metallurgy to make the isolating circle of continuous cast steel, the laundering of amorphous metal, and the release agent for continuous casting aluminum (various glass release agents).
14. Production of evaporation vessels for aluminum plating various capacitor films, aluminum plate of picture tubes, aluminum plating, etc.
15. All types of aluminum-plated fresh-keeping packaging bags,
16. All types of laser anti-counterfeiting aluminiu plating, brand heat stamping materials and all kinds of cigarettes labels, beer labels packaging boxes, cigarette packaging box, etc.
17. Lipstick filler in cosmetics is safe, non-toxic and shiny.
(aka. Technology Co. Ltd. (aka. Our Boron Nitride has high purity, fine particle sizes, and low impurities. Please Please contact us if necessary.