What is boron nitride?
Boron nitride is typically black, brown or dark red crystals with sphalerite framework and great thermal conductivity. Its solidity is 2nd just to diamond, a superhard product frequently used as tool materials as well as abrasives. Boron nitride has chemical resistance and also no erosion by not natural acid as well as water. The boron nitrogen bond is barged in hot, concentrated alkali. Oxidation starts in the air at 1200 ℃. Disintegration starts at regarding 2700 ℃ in a vacuum. It is slightly soluble in hot acid and also insoluble in cool water. The relative thickness is 2.29. The compressive strength is 170 mph. The optimum service temperature is 900 ℃ in the oxidation environment as well as 2800 ℃ in the non-active decrease atmosphere, however the lubrication efficiency is inadequate at room temperature. Many homes of boron nitride are much better than carbon materials. For hexagonal boron nitride: the rubbing coefficient is superficial Great high-temperature security, good thermal shock resistance, high toughness, high thermal conductivity, low expansion coefficient, high resistivity, rust resistance, microwave or infrared transmission.
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