Boron Nitride Properties

Boron nitride is a crystal composed of nitrogen atoms and also boron atoms. The crystal framework is separated right into hexagonal boron nitride (HBN), very closely packed hexagonal boron nitride (WBN) as well as cubic boron nitride.

The crystal framework of hexagonal boron nitride has a comparable graphite split structure, showing a loose, lubricating, moisture-absorbing, light as well as other properties of white powder, so it is likewise called "white graphite". Theoretical thickness 2.27 g/cm3, particular gravity: 2.43, Mohr firmness = 2.
Hexagonal boron nitride has good electrical insulation, thermal conductivity, chemical security, no evident melting factor, 3000 ℃ in 0.1 MPA nitrogen, warm resistance to 2000 ℃ in neutral reduction ambience, 2800 ℃ in nitrogen and argon, bad stability in oxygen atmosphere, as well as temperature level below 1000 ℃. The expansion coefficient of hexagonal boron nitride is equivalent to that of quartz, however its thermal conductivity is ten times that of quartz.
Hexagonal boron nitride does not dissolve cool water. When the water is steamed, it hydrolyses extremely gradually and produces a percentage of boric acid and ammonia, which does not react with weak acid and solid base at area temperature level. It is slightly soluble in warm acid as well as can just be decomposed with molten salt hydroxide as well as potassium hydroxide.

Boron Nitride Properties
1. High heat resistance: sublimation at 3000 ℃, its strength at 1800 ℃ is two times that at area temperature level, air-cooled at 1500 ℃ to room 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, and 33W/M. K has the greatest thermal conductivity among ceramic materials over 530C.
3, reduced thermal growth coefficient: the development coefficient of 2 × & times; 10-6 is 2nd only to quartz glass, which is the tiniest in ceramics, paired with its high thermal conductivity, so the thermal shock resistance is great.
4. Exceptional electrical homes: great insulation at heat, 1014 Ω& Omega;- centimeters,2000 at 25 ℃ and also 103 Ω& Omega;- cm at 25 ℃. It is the very best high temperature insulating material in ceramics, with breakdown voltage 3KV/MV, low dielectric loss 108HZ 2.5 × & times; 10-4, dielectric continuous 4, clear to microwave and also infrared.
5. Good corrosion resistance: it does not react with general metals (iron, copper, light weight aluminum, lead, etc), uncommon planet steels, precious metals, semiconductor products (germanium, silicon, potassium arsenide), glass, liquified salts (crystal, fluoride, slag), inorganic acid as well as antacid.
6. Low friction coefficient: U is 0.16, does not raise at heat, is extra resistant to heat than molybdenum disulfide as well as graphite, oxidation atmosphere can be consumed to 900C, vacuum cleaner can be used at 2000 ℃.
7. High pureness great B is high: its contamination web content is less than 10PPM, but B material is greater than 43.6%.
8. Machinability: its firmness is Morse 2, so it can be processed into parts with high accuracy by general machining techniques.

What is hexagonal boron nitride made use of in?
Hexagonal boron nitride can be made use of in the manufacture of TiB2/BN composite ceramics, progressed refractories and also superhard materials, separation rings of straight constant rolling steel, heat resistant lubricants and heat finishings, as well as resources for the synthesis of cubic boron nitride.

Details uses:
1. Boron nitride is a mold release agent for metal forming and a lubricant for metal cable illustration.
2. Unique electrolysis and also resistance materials of boron nitride at high temperature.
3. Boron nitride is suitable for heat strong lubricants, extrusion antiwear additives, ceramic composite ingredients, refractories as well as antioxidant ingredients, specifically for liquified metal Faustian occasions, heat enhancement additives and also high temperature resistant insulation materials.
4. Boron nitride is suitable for heat-sealed desiccant of transistor as well as additive of polymer such as plastic material.
5. Boron nitride items pressed right into various shapes can be used as heat, high pressure, insulation and warm dissipation elements.
6. Boron nitride is a thermal securing material in aerospace.
7. With the involvement of stimulant, cubic boron nitride can be transformed into cubic boron nitride as difficult as ruby by high temperature and high pressure therapy.
8. Boron nitride is the structural product of atomic activator.
9. Boron nitride is suitable for the nozzles of aircraft and rocket engines.
10. Boron nitride is an insulator of high voltage, high frequency electrical power 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 tools and also drills for geological exploration as well as oil boring.
13. Boron nitride is utilized in metallurgy for splitting up ring of constant spreading steel, circulation groove of amorphous iron, demoulding representative of continual casting aluminum (various optical glass removing agents).
14. Boron nitride is an evaporator for all type of capacitor film plating, photo tube plating, display plating.
15. Boron nitride is suitable for all kinds of fresh-keeping aluminized bags and so on.
16. Boron nitride is a range of laser anti-counterfeiting aluminum plating, hallmark gilding products, all type of cigarette tags, beer labels, product packaging boxes, cigarette boxes.
17. Boron nitride is suitable for cosmetics. Can be used for lipstick fillers, non-toxic as well as lubricating, but also shiny.

Boron Nitride Cost
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