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Boron nitride ring description boron nitride, also known as bn, hexagonal boron nitride (h-bn) and hot pressed boron nitride,u00a0is a good self-lubricate ceramic that can withstand high temperature and maintain its lubricating capability in high vacuum environment. sam boron nitride crucibles are made from hot pressedu00a0boron nitride blank.
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Silicon carbide seal ring description silicon carbide (sic) is a lightweight ceramic material with high strength properties comparable to diamond. it has excellent thermal conductivity, low thermal expansion, and is resistant to corrosion from acids.
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