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Boron Nitride Properties

Boron nitride is a crystal composed of nitrogen atoms and also boron atoms. The crystal structure is divided right into hexagonal boron nitride (HBN), carefully packed hexagonal boron nitride (WBN) and also cubic boron nitride.

The crystal framework of hexagonal boron nitride has a similar graphite split framework, showing a loosened, lubricating, moisture-absorbing, light as well as various other residential properties of white powder, so it is additionally called "white graphite". Theoretical density 2.27 g/cm3, certain gravity: 2.43, Mohr solidity = 2.
Hexagonal boron nitride has good electrical insulation, thermal conductivity, chemical stability, no noticeable melting factor, 3000 ℃ in 0.1 MPA nitrogen, heat resistance to 2000 ℃ in neutral decrease atmosphere, 2800 ℃ in nitrogen as well as argon, inadequate security in oxygen atmosphere, and temperature level 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 dissolve cold water. When the water is steamed, it hydrolyses very gradually as well as generates a percentage of boric acid and also ammonia, which does not respond with weak acid as well as solid base at space temperature level. It is somewhat soluble in hot acid and can just be disintegrated with molten salt hydroxide as well as potassium hydroxide.

Boron Nitride Characteristics
1. High heat resistance: sublimation at 3000 ℃, its strength at 1800 ℃ is twice that at area temperature, air-cooled at 1500 ℃ to room temperature level for loads of times, and 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 amongst ceramic products over 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 porcelains, coupled with its high thermal conductivity, so the thermal shock resistance is excellent.
4. Superb electric homes: great insulation at high temperature, 1014 Ω& Omega;- cm,2000 at 25 ℃ as well as 103 Ω& Omega;- cm at 25 ℃. It is the most effective high temperature protecting product in ceramics, with break down voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric continuous 4, transparent to microwave and also infrared.
5. Great rust resistance: it does not react with general steels (iron, copper, aluminum, lead, etc), rare earth steels, rare-earth elements, semiconductor materials (germanium, silicon, potassium arsenide), glass, liquified salts (crystal, fluoride, slag), inorganic acid and alkali.
6. Low friction coefficient: U is 0.16, does not increase at high temperature, is a lot more resistant to high temperature than molybdenum disulfide as well as graphite, oxidation environment can be consumed to 900C, vacuum cleaner can be utilized at 2000 ℃.
7. High purity excellent B is high: its impurity material is much less than 10PPM, yet B material is greater than 43.6%.
8. Machinability: its hardness is Morse 2, so it can be refined into get rid of high accuracy by basic machining approaches.

What is hexagonal boron nitride used in?
Hexagonal boron nitride can be made use of in the manufacture of TiB2/BN composite porcelains, advanced refractories and also superhard materials, separation rings of horizontal continuous rolling steel, high temperature resistant lubricating substances as well as heat layers, in addition to basic materials for the synthesis of cubic boron nitride.

Certain usages:
1. Boron nitride is a mold launch agent for steel creating as well as a lube for steel cord illustration.
2. Special electrolysis and also resistance products of boron nitride at heat.
3. Boron nitride is suitable for heat solid lubricating substances, extrusion antiwear ingredients, ceramic composite additives, refractories as well as antioxidant additives, especially for liquified steel Faustian celebrations, warm improvement ingredients and high temperature immune insulation products.
4. Boron nitride appropriates for heat-sealed desiccant of transistor and also additive of polymer such as plastic material.
5. Boron nitride products pressed into numerous forms can be utilized as high temperature, high pressure, insulation and also heat dissipation elements.
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 tough as ruby by heat and also high stress treatment.
8. Boron nitride is the structural product of atomic activator.
9. Boron nitride appropriates for the nozzles of aircraft and also rocket engines.
10. Boron nitride is an insulator of high voltage, high frequency electrical power and plasma arc.
11. Boron nitride is a product packaging material to stop neutron radiation.
12. The superhard material made from boron nitride can be made into high-speed cutting devices and drills for geological expedition as well as oil drilling.
13. Boron nitride is utilized in metallurgy for splitting up ring of continuous spreading steel, flow groove of amorphous iron, demoulding agent of continual spreading aluminum (different optical glass removing representatives).
14. Boron nitride is an evaporator for all sort of capacitor film plating, image tube plating, present plating.
15. Boron nitride is suitable for all sort of fresh-keeping aluminized bags and so forth.
16. Boron nitride is a range of laser anti-counterfeiting light weight aluminum plating, trademark gilding materials, all type of cigarette labels, beer labels, product packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be utilized for lipstick fillers, safe and also lubricating, however additionally glossy.

Boron Nitride Cost
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Boron Nitride Vendor
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