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Boron Nitride Properties

Boron nitride is a crystal composed of nitrogen atoms as well as boron atoms. The crystal structure is separated right into hexagonal boron nitride (HBN), closely jam-packed hexagonal boron nitride (WBN) as well as cubic boron nitride.

The crystal framework of hexagonal boron nitride has a similar graphite split framework, revealing a loose, lubricating, moisture-absorbing, light and other residential properties of white powder, so it is also called "white graphite". Academic thickness 2.27 g/cm3, details gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has excellent electrical insulation, thermal conductivity, chemical security, no noticeable melting point, 3000 ℃ in 0.1 MPA nitrogen, warm resistance to 2000 ℃ in neutral decrease atmosphere, 2800 ℃ in nitrogen and argon, bad security in oxygen ambience, and temperature below 1000 ℃. The development coefficient of hexagonal boron nitride amounts that of quartz, but its thermal conductivity is 10 times that of quartz.
Hexagonal boron nitride does not liquify cool water. When the water is steamed, it hydrolyses extremely slowly as well as generates a percentage of boric acid and also ammonia, which does not react with weak acid and also solid base at room temperature. It is slightly soluble in warm acid as well as can just be disintegrated with liquified sodium hydroxide and also potassium hydroxide.

Boron Nitride Characteristics
1. High warm resistance: sublimation at 3000 ℃, its strength at 1800 ℃ is two times that at room temperature level, air-cooled at 1500 ℃ to area temperature for lots of times, as well as does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed items are the same as pure iron, as well as 33W/M. K has the greatest thermal conductivity among ceramic products above 530C.
3, low thermal growth coefficient: the development coefficient of 2 × & times; 10-6 is second only to quartz glass, which is the smallest in ceramics, coupled with its high thermal conductivity, so the thermal shock resistance is great.
4. Superb electric residential properties: excellent insulation at heat, 1014 Ω& Omega;- cm,2000 at 25 ℃ as well as 103 Ω& Omega;- centimeters at 25 ℃. It is the most effective heat shielding product in porcelains, with breakdown voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric constant 4, transparent to microwave as well as infrared.
5. Great corrosion resistance: it does not respond with general metals (iron, copper, light weight aluminum, lead, and so on), rare planet steels, precious metals, semiconductor products (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), not natural acid and antacid.
6. Reduced rubbing coefficient: U is 0.16, does not increase at high temperature, is more resistant to heat than molybdenum disulfide and graphite, oxidation environment can be used up to 900C, vacuum can be made use of at 2000 ℃.
7. High pureness excellent B is high: its impurity content is less than 10PPM, however B web content is more than 43.6%.
8. Machinability: its solidity is Morse 2, so it can be refined right into parts with high accuracy by basic machining approaches.

What is hexagonal boron nitride utilized in?
Hexagonal boron nitride can be made use of in the manufacture of TiB2/BN composite ceramics, progressed refractories and also superhard materials, splitting up rings of straight constant rolling steel, heat resistant lubricants as well as high temperature finishes, along with raw materials for the synthesis of cubic boron nitride.

Certain uses:
1. Boron nitride is a mold launch agent for metal forming as well as a lube for steel wire drawing.
2. Unique electrolysis as well as resistance materials of boron nitride at high temperature.
3. Boron nitride appropriates for high temperature solid lubricating substances, extrusion antiwear ingredients, ceramic composite additives, refractories as well as antioxidant additives, especially for molten steel Faustian events, heat improvement ingredients and also heat resistant insulation products.
4. Boron nitride appropriates for heat-sealed desiccant of transistor and additive of polymer such as plastic material.
5. Boron nitride products pressed into numerous shapes can be made use of as high temperature, high stress, insulation and also warm dissipation parts.
6. Boron nitride is a thermal securing material in aerospace.
7. With the engagement of catalyst, cubic boron nitride can be changed into cubic boron nitride as hard as ruby by heat and high stress therapy.
8. Boron nitride is the structural material of atomic reactor.
9. Boron nitride is suitable for the nozzles of aircraft and also rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electrical energy as well as plasma arc.
11. Boron nitride is a packaging material to avoid neutron radiation.
12. The superhard product made from boron nitride can be made right into high-speed cutting devices and drills for geological exploration and oil drilling.
13. Boron nitride is made use of in metallurgy for splitting up ring of continual spreading steel, circulation groove of amorphous iron, demoulding representative of continual casting light weight aluminum (various optical glass removing representatives).
14. Boron nitride is an evaporator for all type of capacitor movie plating, photo tube plating, present plating.
15. Boron nitride is suitable for all sort of fresh-keeping aluminized bags and so on.
16. Boron nitride is a selection of laser anti-counterfeiting aluminum plating, trademark gilding products, all type of cigarette labels, beer labels, packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be made use of for lipstick fillers, non-toxic as well as lubricating, however also shiny.

Boron Nitride Price
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