Boron Nitride Properties

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

The crystal structure of hexagonal boron nitride has a comparable graphite layered structure, showing a loose, lubricating, moisture-absorbing, light as well as various other homes of white powder, so it is additionally called "white graphite". Theoretical density 2.27 g/cm3, particular gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has excellent electric insulation, thermal conductivity, chemical stability, no apparent melting factor, 3000 ℃ in 0.1 MPA nitrogen, warmth resistance to 2000 ℃ in neutral reduction environment, 2800 ℃ in nitrogen and argon, bad security in oxygen ambience, and also temperature below 1000 ℃. The expansion coefficient of hexagonal boron nitride amounts that of quartz, but its thermal conductivity is ten times that of quartz.
Hexagonal boron nitride does not dissolve cool water. When the water is boiled, it hydrolyses really gradually as well as produces a small amount of boric acid as well as ammonia, which does not react with weak acid as well as strong base at room temperature. It is a little soluble in hot acid and also can just be decomposed with liquified sodium hydroxide as well as potassium hydroxide.

Boron Nitride Qualities
1. High warm resistance: sublimation at 3000 ℃, its toughness at 1800 ℃ is twice that at room temperature, air-cooled at 1500 ℃ to space temperature level for dozens of times, as well as does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed products coincide as pure iron, as well as 33W/M. K has the highest thermal conductivity amongst ceramic materials above 530C.
3, low thermal expansion coefficient: the growth coefficient of 2 × & times; 10-6 is 2nd just to quartz glass, which is the smallest in porcelains, combined with its high thermal conductivity, so the thermal shock resistance is very good.
4. Outstanding electrical residential properties: excellent insulation at high temperature, 1014 Ω& Omega;- cm,2000 at 25 ℃ and also 103 Ω& Omega;- cm at 25 ℃. It is the most effective high temperature insulating material in ceramics, with break down voltage 3KV/MV, low dielectric loss 108HZ 2.5 × & times; 10-4, dielectric continuous 4, clear to microwave and infrared.
5. Good deterioration resistance: it does not react with basic metals (iron, copper, light weight aluminum, lead, etc), unusual planet metals, rare-earth elements, semiconductor products (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), not natural acid as well as antacid.
6. Low friction coefficient: U is 0.16, does not boost at heat, is much more immune to heat than molybdenum disulfide as well as graphite, oxidation environment 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, but B content is more than 43.6%.
8. Machinability: its firmness is Morse 2, so it can be processed right into get rid of high precision by general machining approaches.

What is hexagonal boron nitride utilized in?
Hexagonal boron nitride can be used in the manufacture of TiB2/BN composite ceramics, advanced refractories as well as superhard products, separation rings of straight constant rolling steel, heat resistant lubricants and high temperature finishings, along with basic materials for the synthesis of cubic boron nitride.

Details uses:
1. Boron nitride is a mold and mildew launch agent for metal creating and also a lube for metal wire drawing.
2. Special electrolysis and also resistance products of boron nitride at heat.
3. Boron nitride is suitable for heat strong lubricating substances, extrusion antiwear additives, ceramic composite additives, refractories and also antioxidant additives, particularly for liquified steel Faustian events, warmth enhancement ingredients and high temperature resistant insulation products.
4. Boron nitride is suitable for heat-sealed desiccant of transistor and additive of polymer such as plastic material.
5. Boron nitride items pressed into different forms can be used as heat, high stress, insulation as well as heat dissipation parts.
6. Boron nitride is a thermal shielding product in aerospace.
7. With the participation of driver, cubic boron nitride can be transformed right into cubic boron nitride as difficult as diamond by heat and high stress therapy.
8. Boron nitride is the architectural product of atomic reactor.
9. Boron nitride is suitable for the nozzles of aircraft and rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electricity and plasma arc.
11. Boron nitride is a packaging product to prevent neutron radiation.
12. The superhard product made from boron nitride can be made right into high-speed cutting devices and drills for geological expedition as well as oil boring.
13. Boron nitride is made use of in metallurgy for separation ring of continual spreading steel, circulation groove of amorphous iron, demoulding representative of continual casting light weight aluminum (numerous optical glass stripping agents).
14. Boron nitride is an evaporator for all sort of capacitor movie plating, image tube plating, present plating.
15. Boron nitride is suitable for all kinds of fresh-keeping aluminized bags and so forth.
16. Boron nitride is a variety of laser anti-counterfeiting light weight aluminum plating, trademark gilding materials, all sort of cigarette labels, beer tags, product packaging boxes, cigarette boxes.
17. Boron nitride is suitable for cosmetics. Can be made use of for lipstick fillers, non-toxic and lubricating, however likewise shiny.

Boron Nitride Cost
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Boron Nitride Vendor
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