Boron Nitride Properties

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

The crystal structure of hexagonal boron nitride has a comparable graphite layered structure, revealing a loose, lubricating, moisture-absorbing, light and other residential properties of white powder, so it is likewise called "white graphite". Academic density 2.27 g/cm3, details gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has good electrical insulation, thermal conductivity, chemical security, no evident melting factor, 3000 ℃ in 0.1 MPA nitrogen, warmth resistance to 2000 ℃ in neutral decrease ambience, 2800 ℃ in nitrogen and also argon, bad stability in oxygen ambience, as well as 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 liquify chilly water. When the water is boiled, it hydrolyses really gradually as well as produces a percentage of boric acid and ammonia, which does not respond with weak acid and solid base at area temperature level. It is somewhat soluble in warm acid as well as can only be broken down with molten sodium hydroxide and also potassium hydroxide.

Boron Nitride Properties
1. High heat resistance: sublimation at 3000 ℃, its stamina at 1800 ℃ is twice that at area temperature level, air-cooled at 1500 ℃ to area temperature for loads of times, as well as does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed products are the same as pure iron, as well as 33W/M. K has the highest thermal conductivity amongst ceramic materials over 530C.
3, reduced thermal growth coefficient: the development coefficient of 2 × & times; 10-6 is second just to quartz glass, which is the smallest in porcelains, combined with its high thermal conductivity, so the thermal shock resistance is great.
4. Exceptional electrical residential properties: good insulation at heat, 1014 Ω& Omega;- centimeters,2000 at 25 ℃ as well as 103 Ω& Omega;- cm at 25 ℃. It is the very best heat shielding material in porcelains, with malfunction voltage 3KV/MV, low dielectric loss 108HZ 2.5 × & times; 10-4, dielectric consistent 4, clear to microwave as well as infrared.
5. Great rust resistance: it does not react with general steels (iron, copper, light weight aluminum, lead, and so on), rare planet metals, precious metals, semiconductor products (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), not natural acid and also alkali.
6. Reduced rubbing coefficient: U is 0.16, does not boost at high temperature, is extra immune to heat than molybdenum disulfide and graphite, oxidation ambience can be used up to 900C, vacuum cleaner can be utilized at 2000 ℃.
7. High pureness good B is high: its impurity content is much less than 10PPM, but B material is more than 43.6%.
8. Machinability: its hardness is Morse 2, so it can be refined right into parts with high precision by basic machining approaches.

What is hexagonal boron nitride made use of in?
Hexagonal boron nitride can be utilized in the manufacture of TiB2/BN composite porcelains, progressed refractories and also superhard materials, splitting up rings of horizontal constant rolling steel, heat resistant lubricating substances and also heat finishings, in addition to resources for the synthesis of cubic boron nitride.

Details usages:
1. Boron nitride is a mold release representative for steel forming and a lubricant for metal cable drawing.
2. Unique electrolysis and resistance materials of boron nitride at high temperature.
3. Boron nitride is suitable for high temperature solid lubricants, extrusion antiwear ingredients, ceramic composite additives, refractories as well as antioxidant additives, specifically for liquified steel Faustian events, warmth improvement ingredients and heat immune 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 pushed into numerous forms can be used as heat, high pressure, insulation as well as warm dissipation parts.
6. Boron nitride is a thermal shielding product in aerospace.
7. With the participation of catalyst, cubic boron nitride can be transformed right into cubic boron nitride as difficult as ruby by high temperature and high pressure therapy.
8. Boron nitride is the architectural product of atomic reactor.
9. Boron nitride appropriates for the nozzles of airplane and also rocket engines.
10. Boron nitride is an insulator of high voltage, high frequency electricity and plasma arc.
11. Boron nitride is a product packaging product to prevent neutron radiation.
12. The superhard product made from boron nitride can be made right into high-speed cutting devices as well as drills for geological expedition as well as oil boring.
13. Boron nitride is utilized in metallurgy for splitting up ring of constant spreading steel, flow groove of amorphous iron, demoulding representative of continual casting aluminum (different optical glass stripping representatives).
14. Boron nitride is an evaporator for all sort of capacitor movie plating, photo tube plating, present plating.
15. Boron nitride is suitable for all kinds of fresh-keeping aluminized bags and so on.
16. Boron nitride is a selection of laser anti-counterfeiting aluminum plating, hallmark gilding materials, all kinds of cigarette labels, beer tags, packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be utilized for lipstick fillers, non-toxic and lubricating, but also glossy.

Boron Nitride Rate
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