Boron Nitride Properties

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

The crystal framework of hexagonal boron nitride has a comparable graphite layered framework, showing a loosened, lubricating, moisture-absorbing, light and also various other properties of white powder, so it is additionally called "white graphite". Academic thickness 2.27 g/cm3, specific gravity: 2.43, Mohr hardness = 2.
Hexagonal boron nitride has excellent electrical insulation, thermal conductivity, chemical security, no obvious melting point, 3000 ℃ in 0.1 MPA nitrogen, warm resistance to 2000 ℃ in neutral reduction environment, 2800 ℃ in nitrogen and argon, bad stability in oxygen environment, and also temperature below 1000 ℃. The expansion coefficient of hexagonal boron nitride is equivalent to that of quartz, but 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 gradually as well as creates a percentage of boric acid and also ammonia, which does not react with weak acid as well as strong base at space temperature. It is somewhat soluble in warm acid as well as can only be decomposed with molten salt hydroxide and also potassium hydroxide.

Boron Nitride Residences
1. High warm resistance: sublimation at 3000 ℃, its stamina at 1800 ℃ is twice that at room temperature level, air-cooled at 1500 ℃ to area temperature level for loads of times, and does not soften at 2800 ℃ in inert gas.
2. High thermal conductivity: the hot-pressed items coincide as pure iron, as well as 33W/M. K has the greatest thermal conductivity amongst ceramic products over 530C.
3, low thermal expansion coefficient: the expansion coefficient of 2 × & times; 10-6 is 2nd only to quartz glass, which is the smallest in ceramics, paired with its high thermal conductivity, so the thermal shock resistance is excellent.
4. Outstanding electric residential properties: great insulation at high temperature, 1014 Ω& Omega;- centimeters,2000 at 25 ℃ and 103 Ω& Omega;- cm at 25 ℃. It is the most effective high temperature shielding material in ceramics, with break down voltage 3KV/MV, reduced dielectric loss 108HZ 2.5 × & times; 10-4, dielectric constant 4, transparent to microwave and infrared.
5. Great rust resistance: it does not react with general steels (iron, copper, aluminum, lead, etc), uncommon earth steels, 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 boost at heat, is much more resistant to high temperature than molybdenum disulfide and graphite, oxidation ambience can be used up to 900C, vacuum cleaner can be used at 2000 ℃.
7. High purity good B is high: its pollutant material is less than 10PPM, but B content is more than 43.6%.
8. Machinability: its solidity is Morse 2, so it can be refined into get rid of high precision by basic machining methods.

What is hexagonal boron nitride used in?
Hexagonal boron nitride can be made use of in the manufacture of TiB2/BN composite ceramics, advanced refractories and superhard materials, separation rings of straight constant rolling steel, high temperature immune lubricating substances as well as heat layers, in addition to raw materials for the synthesis of cubic boron nitride.

Certain uses:
1. Boron nitride is a mold release representative for metal forming as well as a lubricant for steel cord illustration.
2. Unique electrolysis and also resistance materials of boron nitride at high temperature.
3. Boron nitride appropriates for high temperature strong lubes, extrusion antiwear additives, ceramic composite ingredients, refractories as well as antioxidant additives, particularly for liquified metal Faustian celebrations, heat improvement ingredients as well as high temperature immune insulation materials.
4. Boron nitride appropriates for heat-sealed desiccant of transistor as well as additive of polymer such as plastic material.
5. Boron nitride items pushed right into numerous shapes can be utilized as heat, high pressure, insulation and warmth dissipation parts.
6. Boron nitride is a thermal protecting material in aerospace.
7. With the involvement of driver, 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 structural material of atomic activator.
9. Boron nitride is suitable for the nozzles of aircraft and also rocket engines.
10. Boron nitride is an insulator of high voltage, high regularity power and plasma arc.
11. Boron nitride is a packaging material to stop neutron radiation.
12. The superhard material made from boron nitride can be made right into high-speed cutting devices as well as drills for geological expedition as well as oil exploration.
13. Boron nitride is utilized in metallurgy for splitting up ring of continual casting steel, circulation groove of amorphous iron, demoulding representative of constant casting light weight aluminum (various optical glass removing representatives).
14. Boron nitride is an evaporator for all sort of capacitor movie plating, photo tube plating, show plating.
15. Boron nitride appropriates for all sort of fresh-keeping aluminized bags and more.
16. Boron nitride is a range of laser anti-counterfeiting aluminum plating, trademark gilding products, all kinds of cigarette tags, beer labels, product packaging boxes, cigarette boxes.
17. Boron nitride appropriates for cosmetics. Can be made use of for lipstick fillers, non-toxic and also lubricating, yet likewise shiny.

Boron Nitride Cost
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