Boron Nitride Properties

Boron nitride is a crystal made up of nitrogen atoms and boron atoms. The crystal framework is divided right into hexagonal boron nitride (HBN), closely packed hexagonal boron nitride (WBN) and also cubic boron nitride.

The crystal structure of hexagonal boron nitride has a similar graphite split framework, revealing a loose, lubricating, moisture-absorbing, light and also other homes of white powder, so it is also called "white graphite". Academic thickness 2.27 g/cm3, details gravity: 2.43, Mohr solidity = 2.
Hexagonal boron nitride has good electrical insulation, thermal conductivity, chemical security, no apparent melting point, 3000 ℃ in 0.1 MPA nitrogen, warmth resistance to 2000 ℃ in neutral decrease environment, 2800 ℃ in nitrogen and also argon, inadequate security in oxygen ambience, and temperature level listed below 1000 ℃. The growth coefficient of hexagonal boron nitride is equivalent to that of quartz, however its thermal conductivity is 10 times that of quartz.
Hexagonal boron nitride does not liquify chilly water. When the water is steamed, it hydrolyses very gradually and generates a percentage of boric acid as well as ammonia, which does not respond with weak acid and strong base at room temperature level. It is a little soluble in warm acid as well as can just be decomposed with liquified sodium hydroxide and potassium hydroxide.

Boron Nitride Properties
1. High warm resistance: sublimation at 3000 ℃, its toughness at 1800 ℃ is two times that at room temperature level, air-cooled at 1500 ℃ to space temperature level for dozens of times, and also does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed items coincide as pure iron, and also 33W/M. K has the highest possible thermal conductivity among ceramic materials above 530C.
3, low thermal development coefficient: the development coefficient of 2 × & times; 10-6 is second only to quartz glass, which is the smallest in ceramics, combined with its high thermal conductivity, so the thermal shock resistance is great.
4. Excellent electric homes: great insulation at high temperature, 1014 Ω& Omega;- cm,2000 at 25 ℃ and also 103 Ω& Omega;- cm at 25 ℃. It is the very best high temperature insulating product in ceramics, with failure voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric consistent 4, transparent to microwave and infrared.
5. Excellent corrosion resistance: it does not react with general metals (iron, copper, aluminum, lead, and so on), unusual earth metals, rare-earth elements, semiconductor products (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), inorganic acid and antacid.
6. Low rubbing coefficient: U is 0.16, does not boost at heat, is a lot more immune to high temperature than molybdenum disulfide and graphite, oxidation environment can be consumed to 900C, vacuum can be made use of at 2000 ℃.
7. High pureness good B is high: its pollutant material is much less than 10PPM, yet B web content is more than 43.6%.
8. Machinability: its hardness is Morse 2, so it can be refined right into parts with high accuracy by basic machining techniques.

What is hexagonal boron nitride used in?
Hexagonal boron nitride can be utilized in the manufacture of TiB2/BN composite porcelains, advanced refractories and also superhard materials, separation rings of horizontal continual rolling steel, heat immune lubricating substances as well as heat coverings, in addition to raw materials for the synthesis of cubic boron nitride.

Details usages:
1. Boron nitride is a mold and mildew launch agent for metal developing as well as a lubricant for steel cable illustration.
2. Special electrolysis as well as resistance products of boron nitride at heat.
3. Boron nitride appropriates for heat solid lubricating substances, extrusion antiwear additives, ceramic composite additives, refractories and antioxidant additives, particularly for liquified steel Faustian events, warm improvement ingredients and high temperature immune insulation materials.
4. Boron nitride appropriates for heat-sealed desiccant of transistor and also additive of polymer such as plastic resin.
5. Boron nitride items pressed into various forms can be made use of as high temperature, high stress, insulation and warm dissipation parts.
6. Boron nitride is a thermal shielding product in aerospace.
7. With the participation of driver, cubic boron nitride can be changed right into cubic boron nitride as difficult as diamond by high temperature and also high pressure treatment.
8. Boron nitride is the structural product of atomic activator.
9. Boron nitride is suitable for the nozzles of aircraft and also rocket engines.
10. Boron nitride is an insulator of high voltage, high frequency electrical energy as well as plasma arc.
11. Boron nitride is a product packaging material to prevent neutron radiation.
12. The superhard product made from boron nitride can be made right into high-speed cutting devices as well as drills for geological expedition and also oil drilling.
13. Boron nitride is utilized in metallurgy for splitting up ring of continuous casting steel, flow groove of amorphous iron, demoulding agent of continuous casting light weight aluminum (different optical glass stripping agents).
14. Boron nitride is an evaporator for all kinds of capacitor movie plating, photo tube plating, show plating.
15. Boron nitride appropriates for all kinds of fresh-keeping aluminized bags and more.
16. Boron nitride is a selection of laser anti-counterfeiting light weight aluminum plating, trademark gilding products, all sort of cigarette tags, beer tags, product packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be used for lipstick fillers, safe as well as lubricating, but likewise glossy.

Boron Nitride Price
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Boron Nitride Supplier
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