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boron nitride powder msds is a non-abrasive powder that has good thermal and chemical stability. Its chemical inertness makes it a desirable ceramic for use in high-temperature equipment and metal casting. It has high thermal conductivity and a low coefficient of friction. Boron nitride can be produced in multiple forms, depending on the arrangement of the boron and nitrogen atoms. The amorphous form (a-BN) is non-crystalline and similar to amorphous carbon, while the cubic and hexagonal forms have a more regular atomic arrangement.
Cubic boron nitride (cBN) is synthesized by high-pressure and high-temperature methods. It has a crystal structure that is analogous to diamond. It has good thermal stability and can be operated at higher temperatures than diamond. However, it has a much lower fracture toughness than graphite. Cubic boron nitride is often used in place of diamond-based tools for machining hard materials, particularly ferrous alloys.
Hexagonal boron nitride (h-BN) has very low reactivity with oxygen and other halogens. Moreover, it has excellent thermal stability and can be worked at temperatures up to 2,800 degC (3,700 degF). Hexagonal boron NItride is widely used as grinding material for hard materials because of its high strength and chemical inertness.
Only limited data on toxicity have been available for boron compounds. Short-term exposure to boron has been associated with irritant effects on the upper respiratory tract and nasopharynx, but these have not been found to be of serious health concern. Boron compounds have also been shown to have a number of potential toxicological properties, including neurotoxicity and immunotoxicity.