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 packed hexagonal boron nitride (WBN) and also cubic boron nitride.

The crystal structure of hexagonal boron nitride has a comparable graphite split framework, revealing a loose, lubricating, moisture-absorbing, light and other properties of white powder, so it is likewise called "white graphite". Theoretical thickness 2.27 g/cm3, particular gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has excellent electrical insulation, thermal conductivity, chemical stability, no obvious melting factor, 3000 ℃ in 0.1 MPA nitrogen, warm resistance to 2000 ℃ in neutral reduction atmosphere, 2800 ℃ in nitrogen and also argon, poor stability in oxygen environment, and temperature listed 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 chilly water. When the water is steamed, it hydrolyses very slowly and also produces a small amount of boric acid and ammonia, which does not respond with weak acid as well as strong base at room temperature. It is slightly soluble in hot acid and also can just be broken down with liquified sodium hydroxide and also potassium hydroxide.

Boron Nitride Properties
1. High heat resistance: sublimation at 3000 ℃, its stamina at 1800 ℃ is two times that at area 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 items are the same as pure iron, and 33W/M. K has the highest thermal conductivity amongst ceramic products above 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 porcelains, paired with its high thermal conductivity, so the thermal shock resistance is great.
4. Excellent electric residential properties: excellent insulation at heat, 1014 Ω& Omega;- cm,2000 at 25 ℃ as well as 103 Ω& Omega;- cm at 25 ℃. It is the best high temperature protecting material in ceramics, with malfunction voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric continuous 4, transparent to microwave and infrared.
5. Good deterioration resistance: it does not react with general steels (iron, copper, light weight aluminum, lead, and so on), unusual planet metals, rare-earth elements, semiconductor products (germanium, silicon, potassium arsenide), glass, molten salts (crystal, fluoride, slag), inorganic acid as well as antacid.
6. Reduced rubbing coefficient: U is 0.16, does not increase at heat, is a lot more immune to heat than molybdenum disulfide and also graphite, oxidation environment can be consumed to 900C, vacuum can be made use of at 2000 ℃.
7. High pureness good B is high: its contamination web content is much less than 10PPM, but B web content is greater than 43.6%.
8. Machinability: its hardness is Morse 2, so it can be processed right into get rid of high precision by general machining methods.

What is hexagonal boron nitride made use of in?
Hexagonal boron nitride can be utilized in the manufacture of TiB2/BN composite ceramics, advanced refractories and also superhard materials, separation rings of horizontal continual rolling steel, heat resistant lubricants and also heat finishings, along with raw materials for the synthesis of cubic boron nitride.

Particular uses:
1. Boron nitride is a mold and mildew launch agent for steel creating and also a lubricating substance for steel cable drawing.
2. Special electrolysis and resistance materials of boron nitride at high temperature.
3. Boron nitride appropriates for high temperature solid lubes, extrusion antiwear ingredients, ceramic composite additives, refractories as well as antioxidant additives, especially for molten metal Faustian events, heat improvement additives and high temperature resistant insulation products.
4. Boron nitride is suitable for heat-sealed desiccant of transistor as well as additive of polymer such as plastic resin.
5. Boron nitride items pressed into numerous forms can be used as high temperature, high stress, insulation as well as warmth dissipation components.
6. Boron nitride is a thermal protecting material in aerospace.
7. With the engagement of catalyst, cubic boron nitride can be changed right into cubic boron nitride as tough as diamond by heat as well as high stress treatment.
8. Boron nitride is the architectural product of atomic activator.
9. Boron nitride appropriates for the nozzles of aircraft and also rocket engines.
10. Boron nitride is an insulator of high voltage, high frequency electricity as well as 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 tools and drills for geological expedition and oil boring.
13. Boron nitride is utilized in metallurgy for separation ring of continual casting steel, flow groove of amorphous iron, demoulding representative of continuous casting aluminum (numerous optical glass removing representatives).
14. Boron nitride is an evaporator for all kinds of capacitor movie plating, image tube plating, present plating.
15. Boron nitride appropriates for all kinds of fresh-keeping aluminized bags and more.
16. Boron nitride is a range of laser anti-counterfeiting aluminum plating, trademark gilding materials, all type of cigarette labels, beer labels, packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be utilized for lipstick fillers, non-toxic and also lubricating, but additionally glossy.

Boron Nitride Cost
The rate is influenced by several factors consisting of the supply and need on the market, industry fads, economic activity, market view, as well as unforeseen occasions.
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Boron Nitride Distributor
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