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Boron Nitride Properties

Boron nitride is a crystal made up of nitrogen atoms and boron atoms. The crystal framework is divided into hexagonal boron nitride (HBN), carefully packed hexagonal boron nitride (WBN) and also cubic boron nitride.

The crystal framework of hexagonal boron nitride has a similar graphite layered structure, showing a loosened, lubricating, moisture-absorbing, light as well as various other homes of white powder, so it is also called "white graphite". Academic density 2.27 g/cm3, certain gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has great electrical insulation, thermal conductivity, chemical security, no noticeable melting point, 3000 ℃ in 0.1 MPA nitrogen, warm resistance to 2000 ℃ in neutral reduction atmosphere, 2800 ℃ in nitrogen as well as argon, poor security in oxygen ambience, and temperature level below 1000 ℃. The development 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 cold water. When the water is steamed, it hydrolyses very gradually and also creates a small amount of boric acid and ammonia, which does not react with weak acid as well as strong base at area temperature level. It is slightly soluble in hot acid as well as can just be decomposed with molten sodium hydroxide and also potassium hydroxide.

Boron Nitride Residences
1. High heat resistance: sublimation at 3000 ℃, its stamina at 1800 ℃ is two times that at area temperature, air-cooled at 1500 ℃ to room temperature level for lots of times, and also does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed items are the same as pure iron, as well as 33W/M. K has the highest thermal conductivity amongst ceramic materials above 530C.
3, reduced thermal expansion coefficient: the development coefficient of 2 × & times; 10-6 is 2nd 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 electric buildings: 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 high temperature insulating material in porcelains, with failure voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric continuous 4, clear to microwave and infrared.
5. Great corrosion resistance: it does not respond with general steels (iron, copper, aluminum, lead, and so on), unusual earth metals, rare-earth elements, semiconductor materials (germanium, silicon, potassium arsenide), glass, liquified salts (crystal, fluoride, slag), inorganic acid and also alkali.
6. Reduced rubbing coefficient: U is 0.16, does not boost at heat, is a lot more resistant to high temperature than molybdenum disulfide as well as graphite, oxidation atmosphere can be consumed to 900C, vacuum can be used at 2000 ℃.
7. High pureness good B is high: its pollutant web content is much less than 10PPM, yet B web content is more than 43.6%.
8. Machinability: its firmness is Morse 2, so it can be refined into get rid of high accuracy by general machining methods.

What is hexagonal boron nitride utilized in?
Hexagonal boron nitride can be utilized in the manufacture of TiB2/BN composite ceramics, progressed refractories and also superhard materials, separation rings of straight continual rolling steel, high temperature immune lubes and high temperature coatings, in addition to basic materials for the synthesis of cubic boron nitride.

Specific uses:
1. Boron nitride is a mold launch agent for metal creating and also a lubricant for metal cord illustration.
2. Unique electrolysis as well as resistance products of boron nitride at high temperature.
3. Boron nitride is suitable for high temperature strong lubes, extrusion antiwear ingredients, ceramic composite additives, refractories and also antioxidant ingredients, especially for molten steel Faustian celebrations, warm enhancement additives as well as high temperature immune insulation materials.
4. Boron nitride is suitable for heat-sealed desiccant of transistor and additive of polymer such as plastic material.
5. Boron nitride items pressed right into numerous forms can be made use of as heat, high stress, insulation and also warmth dissipation parts.
6. Boron nitride is a thermal securing product in aerospace.
7. With the involvement of stimulant, cubic boron nitride can be changed right into cubic boron nitride as difficult as ruby by heat and also high pressure treatment.
8. Boron nitride is the structural product of atomic activator.
9. Boron nitride is suitable for the nozzles of airplane and also rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity electrical energy and plasma arc.
11. Boron nitride is a product packaging product to avoid neutron radiation.
12. The superhard product made from boron nitride can be made right into high-speed cutting devices and also drills for geological expedition and also oil exploration.
13. Boron nitride is used in metallurgy for separation ring of continual spreading steel, circulation groove of amorphous iron, demoulding representative of constant casting aluminum (various optical glass removing agents).
14. Boron nitride is an evaporator for all kinds of capacitor film plating, image tube plating, show plating.
15. Boron nitride is suitable for all sort of fresh-keeping aluminized bags and so on.
16. Boron nitride is a selection 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 made use of for lipstick fillers, safe and also lubricating, however additionally glossy.

Boron Nitride Cost
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Boron Nitride Distributor
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