Boron Nitride Properties

Boron nitride is a crystal made up of nitrogen atoms as well as boron atoms. The crystal framework is split into hexagonal boron nitride (HBN), carefully stuffed hexagonal boron nitride (WBN) and cubic boron nitride.

The crystal framework of hexagonal boron nitride has a comparable graphite layered structure, revealing a loose, lubricating, moisture-absorbing, light and other properties of white powder, so it is also called "white graphite". Theoretical thickness 2.27 g/cm3, particular gravity: 2.43, Mohr solidity = 2.
Hexagonal boron nitride has great electric insulation, thermal conductivity, chemical security, no evident melting point, 3000 ℃ in 0.1 MPA nitrogen, warm resistance to 2000 ℃ in neutral decrease environment, 2800 ℃ in nitrogen and argon, bad stability in oxygen environment, and temperature level below 1000 ℃. The growth coefficient of hexagonal boron nitride amounts that of quartz, however its thermal conductivity is 10 times that of quartz.
Hexagonal boron nitride does not dissolve cool water. When the water is boiled, it hydrolyses extremely slowly and creates a percentage of boric acid and also ammonia, which does not react with weak acid and also strong base at area temperature level. It is a little soluble in hot acid as well as can only be decayed with liquified salt hydroxide as well as potassium hydroxide.

Boron Nitride Qualities
1. High heat resistance: sublimation at 3000 ℃, its stamina at 1800 ℃ is twice that at space temperature level, air-cooled at 1500 ℃ to space temperature for loads of times, and also 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 greatest thermal conductivity amongst ceramic materials above 530C.
3, low thermal expansion coefficient: the development coefficient of 2 × & times; 10-6 is second just to quartz glass, which is the tiniest in ceramics, paired with its high thermal conductivity, so the thermal shock resistance is excellent.
4. Exceptional 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 shielding product in ceramics, with break down voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric consistent 4, clear to microwave and also infrared.
5. Good rust resistance: it does not react with general steels (iron, copper, aluminum, lead, and so on), rare planet steels, precious metals, semiconductor products (germanium, silicon, potassium arsenide), glass, liquified salts (crystal, fluoride, slag), inorganic acid and antacid.
6. Low friction coefficient: U is 0.16, does not enhance at heat, is more resistant to heat than molybdenum disulfide and graphite, oxidation environment can be used up to 900C, vacuum can be used at 2000 ℃.
7. High pureness great B is high: its contamination web content is less than 10PPM, however B content is greater than 43.6%.
8. Machinability: its solidity is Morse 2, so it can be refined into get rid of high precision by basic machining techniques.

What is hexagonal boron nitride utilized in?
Hexagonal boron nitride can be utilized in the manufacture of TiB2/BN composite ceramics, progressed refractories and superhard products, separation rings of horizontal continuous rolling steel, heat resistant lubes as well as high temperature layers, as well as basic materials for the synthesis of cubic boron nitride.

Particular uses:
1. Boron nitride is a mold and mildew release agent for metal forming and also a lubricant for steel cable drawing.
2. Special electrolysis and also resistance materials of boron nitride at high temperature.
3. Boron nitride appropriates for heat strong lubes, extrusion antiwear additives, ceramic composite ingredients, refractories and also antioxidant additives, especially for molten steel Faustian events, heat enhancement additives as well as heat resistant insulation products.
4. Boron nitride appropriates for heat-sealed desiccant of transistor and also additive of polymer such as plastic resin.
5. Boron nitride items pressed right into different shapes can be utilized as high temperature, high pressure, insulation and warm dissipation components.
6. Boron nitride is a thermal protecting material in aerospace.
7. With the engagement of catalyst, cubic boron nitride can be changed into cubic boron nitride as tough as ruby by heat and also high pressure therapy.
8. Boron nitride is the architectural product of atomic activator.
9. Boron nitride is suitable for the nozzles of aircraft as well as rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electricity and also plasma arc.
11. Boron nitride is a packaging product to stop neutron radiation.
12. The superhard product made from boron nitride can be made right into high-speed cutting devices and also drills for geological exploration and also oil exploration.
13. Boron nitride is used in metallurgy for separation ring of continuous casting steel, circulation groove of amorphous iron, demoulding agent of continual spreading aluminum (numerous optical glass removing agents).
14. Boron nitride is an evaporator for all sort of capacitor film plating, image tube plating, show 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 aluminum plating, trademark gilding products, all type of cigarette tags, beer tags, packaging boxes, cigarette boxes.
17. Boron nitride is suitable for cosmetics. Can be utilized for lipstick fillers, safe and lubricating, however likewise shiny.

Boron Nitride Price
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