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Boron Nitride Properties

Boron nitride is a crystal made up of nitrogen atoms and boron atoms. The crystal structure is split into hexagonal boron nitride (HBN), very closely packed hexagonal boron nitride (WBN) and cubic boron nitride.

The crystal structure of hexagonal boron nitride has a comparable graphite split structure, showing a loosened, lubricating, moisture-absorbing, light and also various other residential properties of white powder, so it is additionally called "white graphite". Academic thickness 2.27 g/cm3, particular gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has excellent electric insulation, thermal conductivity, chemical security, no evident melting factor, 3000 ℃ in 0.1 MPA nitrogen, heat resistance to 2000 ℃ in neutral reduction ambience, 2800 ℃ in nitrogen and argon, poor stability in oxygen ambience, as well as temperature listed below 1000 ℃. The development coefficient of hexagonal boron nitride amounts that of quartz, however its thermal conductivity is 10 times that of quartz.
Hexagonal boron nitride does not dissolve cool water. When the water is steamed, it hydrolyses very slowly and produces a small amount of boric acid as well as ammonia, which does not react with weak acid as well as solid base at space temperature. It is slightly soluble in warm acid and can just be disintegrated with molten salt hydroxide and potassium hydroxide.

Boron Nitride Residences
1. High heat resistance: sublimation at 3000 ℃, its strength at 1800 ℃ is two times that at area temperature level, air-cooled at 1500 ℃ to space temperature level for dozens of times, and does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed products are the same as pure iron, and also 33W/M. K has the highest thermal conductivity amongst ceramic products above 530C.
3, reduced thermal growth coefficient: the expansion coefficient of 2 × & times; 10-6 is 2nd only to quartz glass, which is the smallest in porcelains, coupled with its high thermal conductivity, so the thermal shock resistance is great.
4. Outstanding electric residential properties: great insulation at heat, 1014 Ω& Omega;- centimeters,2000 at 25 ℃ as well as 103 Ω& Omega;- cm at 25 ℃. It is the best high temperature insulating product in ceramics, with malfunction voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric constant 4, clear to microwave and also infrared.
5. Great corrosion resistance: it does not react with basic steels (iron, copper, light weight aluminum, lead, and so on), rare planet steels, rare-earth elements, semiconductor materials (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), inorganic acid and antacid.
6. Reduced friction coefficient: U is 0.16, does not raise at heat, is much more resistant to heat than molybdenum disulfide as well as graphite, oxidation atmosphere can be used up to 900C, vacuum can be utilized at 2000 ℃.
7. High pureness excellent B is high: its pollutant web content is less than 10PPM, yet B material is more than 43.6%.
8. Machinability: its hardness is Morse 2, so it can be refined into get rid of high precision by general machining techniques.

What is hexagonal boron nitride utilized in?
Hexagonal boron nitride can be utilized in the manufacture of TiB2/BN composite porcelains, progressed refractories and also superhard products, separation rings of straight constant rolling steel, high temperature resistant lubricants and also heat layers, as well as raw materials for the synthesis of cubic boron nitride.

Certain usages:
1. Boron nitride is a mold launch representative for steel developing and a lubricating substance for metal cable drawing.
2. Unique electrolysis and resistance products of boron nitride at heat.
3. Boron nitride is suitable for high temperature solid lubricants, extrusion antiwear additives, ceramic composite additives, refractories and also antioxidant ingredients, specifically for liquified steel Faustian celebrations, heat improvement ingredients as well as high temperature resistant insulation products.
4. Boron nitride appropriates for heat-sealed desiccant of transistor and additive of polymer such as plastic resin.
5. Boron nitride products pressed into different shapes can be utilized as heat, high pressure, insulation and warm dissipation components.
6. Boron nitride is a thermal shielding product in aerospace.
7. With the involvement of driver, cubic boron nitride can be changed right into cubic boron nitride as tough as ruby by high temperature and also high stress therapy.
8. Boron nitride is the structural material of atomic activator.
9. Boron nitride is suitable for the nozzles of aircraft as well as rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electrical power and plasma arc.
11. Boron nitride is a product packaging product to stop neutron radiation.
12. The superhard product made from boron nitride can be made into high-speed cutting devices as well as drills for geological expedition and also oil drilling.
13. Boron nitride is made use of in metallurgy for separation ring of constant casting steel, circulation groove of amorphous iron, demoulding agent of continuous spreading light weight aluminum (various optical glass stripping agents).
14. Boron nitride is an evaporator for all sort of capacitor movie plating, photo tube plating, show plating.
15. Boron nitride appropriates for all kinds of fresh-keeping aluminized bags and so forth.
16. Boron nitride is a range of laser anti-counterfeiting aluminum plating, hallmark gilding products, all sort of cigarette labels, beer tags, product packaging boxes, cigarette boxes.
17. Boron nitride is suitable for cosmetics. Can be used for lipstick fillers, safe and also lubricating, but additionally glossy.

Boron Nitride Price
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Boron Nitride Distributor
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