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Boron nitride is a crystal composed of nitrogen atoms and also boron atoms. The crystal framework is separated into hexagonal boron nitride (HBN), very closely stuffed hexagonal boron nitride (WBN) as well as cubic boron nitride.
The crystal framework of hexagonal boron nitride has a comparable graphite split structure, revealing a loosened, lubricating, moisture-absorbing, light and various other homes of white powder, so it is additionally called "white graphite". Academic thickness 2.27 g/cm3, details gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has excellent electric insulation, thermal conductivity, chemical stability, no obvious melting factor, 3000 ℃ in 0.1 MPA nitrogen, warmth resistance to 2000 ℃ in neutral decrease environment, 2800 ℃ in nitrogen and argon, inadequate stability in oxygen ambience, and temperature listed below 1000 ℃. The development 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 chilly water. When the water is steamed, it hydrolyses extremely gradually as well as produces a percentage of boric acid as well as ammonia, which does not react with weak acid and also strong base at room temperature. It is somewhat soluble in hot acid and also can just be decayed with molten salt hydroxide and also potassium hydroxide.
Boron Nitride Characteristics
1. High warmth resistance: sublimation at 3000 ℃, its strength at 1800 ℃ is two times that at room temperature level, air-cooled at 1500 ℃ to room temperature for loads of times, and does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed products are the same as pure iron, and 33W/M. K has the greatest thermal conductivity among ceramic products over 530C.
3, reduced thermal development coefficient: the expansion coefficient of 2 × & times; 10-6 is second only to quartz glass, which is the tiniest in porcelains, coupled with its high thermal conductivity, so the thermal shock resistance is great.
4. Exceptional electrical residential properties: excellent insulation at heat, 1014 Ω& Omega;- cm,2000 at 25 ℃ and also 103 Ω& Omega;- cm at 25 ℃. It is the very best high temperature protecting material in ceramics, with failure voltage 3KV/MV, low dielectric loss 108HZ 2.5 × & times; 10-4, dielectric continuous 4, transparent to microwave and infrared.
5. Great rust resistance: it does not respond with basic steels (iron, copper, aluminum, lead, and so on), rare planet steels, precious metals, semiconductor products (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), inorganic acid and alkali.
6. Reduced friction coefficient: U is 0.16, does not increase at high temperature, is a lot more immune to heat than molybdenum disulfide as well as graphite, oxidation environment can be used up to 900C, vacuum cleaner can be used at 2000 ℃.
7. High purity great B is high: its pollutant 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 refined right into parts with high accuracy by general machining techniques.
What is hexagonal boron nitride made use of in?
Hexagonal boron nitride can be used in the manufacture of TiB2/BN composite porcelains, progressed refractories as well as superhard materials, splitting up rings of straight constant rolling steel, high temperature immune lubes and heat coatings, in addition to resources for the synthesis of cubic boron nitride.
1. Boron nitride is a mold release representative for steel forming and a lubricant for metal cord drawing.
2. Special electrolysis and resistance products of boron nitride at high temperature.
3. Boron nitride is suitable for heat strong lubes, extrusion antiwear ingredients, ceramic composite ingredients, refractories as well as antioxidant ingredients, specifically for liquified metal Faustian occasions, warmth improvement ingredients as well as heat resistant insulation products.
4. Boron nitride appropriates for heat-sealed desiccant of transistor as well as additive of polymer such as plastic material.
5. Boron nitride products pressed into various shapes can be made use of as heat, high pressure, insulation and also warmth dissipation elements.
6. Boron nitride is a thermal securing product in aerospace.
7. With the engagement of driver, cubic boron nitride can be transformed into cubic boron nitride as hard as diamond by heat and high stress treatment.
8. Boron nitride is the architectural material of atomic activator.
9. Boron nitride appropriates for the nozzles of airplane and rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electrical energy and also plasma arc.
11. Boron nitride is a product packaging material to avoid neutron radiation.
12. The superhard material made from boron nitride can be made into high-speed cutting devices and also drills for geological expedition as well as oil drilling.
13. Boron nitride is used in metallurgy for splitting up ring of continual spreading steel, flow groove of amorphous iron, demoulding agent of continual casting aluminum (different optical glass removing agents).
14. Boron nitride is an evaporator for all sort of capacitor film plating, photo tube plating, present plating.
15. Boron nitride is suitable for all type of fresh-keeping aluminized bags and so forth.
16. Boron nitride is a range of laser anti-counterfeiting light weight aluminum plating, hallmark gilding products, all sort of cigarette labels, beer labels, product packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be utilized for lipstick fillers, non-toxic as well as lubricating, yet additionally glossy.
Boron Nitride Price
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Boron Nitride Vendor
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