Boron Nitride Properties

Boron nitride is a crystal made up of nitrogen atoms as well as boron atoms. The crystal structure is separated right into hexagonal boron nitride (HBN), closely stuffed hexagonal boron nitride (WBN) as well as cubic boron nitride.

The crystal structure of hexagonal boron nitride has a comparable graphite split framework, revealing a loose, lubricating, moisture-absorbing, light and various other residential or commercial properties of white powder, so it is also called "white graphite". Theoretical density 2.27 g/cm3, certain gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has good electric insulation, thermal conductivity, chemical security, no noticeable melting point, 3000 ℃ in 0.1 MPA nitrogen, warmth resistance to 2000 ℃ in neutral decrease atmosphere, 2800 ℃ in nitrogen and also argon, bad security in oxygen environment, as well as temperature level listed below 1000 ℃. The expansion coefficient of hexagonal boron nitride amounts that of quartz, but its thermal conductivity is ten times that of quartz.
Hexagonal boron nitride does not dissolve cold water. When the water is boiled, it hydrolyses very slowly and creates a small amount of boric acid and ammonia, which does not react with weak acid and strong base at space temperature level. It is a little soluble in warm acid as well as can only be decayed with molten salt hydroxide as well as potassium hydroxide.

Boron Nitride Properties
1. High warm resistance: sublimation at 3000 ℃, its strength at 1800 ℃ is twice that at area temperature level, air-cooled at 1500 ℃ to room temperature for lots of times, and also 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 highest thermal conductivity among ceramic materials over 530C.
3, low thermal development 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 very good.
4. Exceptional electrical homes: good insulation at high temperature, 1014 Ω& Omega;- cm,2000 at 25 ℃ as well as 103 Ω& Omega;- cm at 25 ℃. It is the very best heat insulating material in ceramics, with breakdown voltage 3KV/MV, low dielectric loss 108HZ 2.5 × & times; 10-4, dielectric consistent 4, transparent to microwave as well as infrared.
5. Great deterioration resistance: it does not react with basic metals (iron, copper, aluminum, lead, and so on), unusual planet steels, rare-earth elements, semiconductor materials (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), not natural acid as well as antacid.
6. Low friction coefficient: U is 0.16, does not raise at high temperature, is a lot more immune to heat than molybdenum disulfide as well as graphite, oxidation environment can be consumed to 900C, vacuum cleaner can be used at 2000 ℃.
7. High pureness good B is high: its contamination material is much less than 10PPM, but B web content is greater than 43.6%.
8. Machinability: its solidity is Morse 2, so it can be refined right into parts with high accuracy by general machining methods.

What is hexagonal boron nitride utilized in?
Hexagonal boron nitride can be used in the manufacture of TiB2/BN composite porcelains, progressed refractories and also superhard materials, separation rings of horizontal continual rolling steel, high temperature immune lubes as well as heat coverings, as well as raw materials for the synthesis of cubic boron nitride.

Specific uses:
1. Boron nitride is a mold and mildew launch representative for steel forming as well as a lubricant for steel cord drawing.
2. Special electrolysis and resistance products of boron nitride at heat.
3. Boron nitride is suitable for heat strong lubricants, extrusion antiwear ingredients, ceramic composite ingredients, refractories and antioxidant additives, specifically for liquified steel Faustian occasions, warmth enhancement additives 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 items pressed right into numerous shapes can be used as heat, high stress, insulation and also heat dissipation parts.
6. Boron nitride is a thermal protecting material in aerospace.
7. With the engagement of stimulant, cubic boron nitride can be changed right into cubic boron nitride as tough as diamond by heat as well as high pressure treatment.
8. Boron nitride is the architectural material of atomic activator.
9. Boron nitride appropriates for the nozzles of aircraft and rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electricity as well as plasma arc.
11. Boron nitride is a product packaging product to prevent neutron radiation.
12. The superhard material made from boron nitride can be made right into high-speed cutting tools as well as drills for geological exploration and also oil boring.
13. Boron nitride is used in metallurgy for separation ring of continuous spreading steel, circulation groove of amorphous iron, demoulding representative of constant casting light weight aluminum (numerous optical glass removing agents).
14. Boron nitride is an evaporator for all kinds of capacitor film plating, picture tube plating, show plating.
15. Boron nitride is suitable for all kinds of fresh-keeping aluminized bags and so on.
16. Boron nitride is a variety of laser anti-counterfeiting light weight aluminum plating, trademark gilding products, all kinds of cigarette labels, beer labels, packaging boxes, cigarette boxes.
17. Boron nitride is suitable for cosmetics. Can be made use of for lipstick fillers, non-toxic and lubricating, however likewise shiny.

Boron Nitride Price
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