High Purity Zinc Oxide ZnO powder CAS 1314-23-4,99.9%

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Use of boron nitride

Boron nitride is resistant to chemical attack and is not eroded by inorganic acid and water. In a hot concentrated base, the boron nitrogen bond is broken. Above 1200℃ begins to oxidize in the air. The melting point is 3000℃; slightly below 3000℃ begins to sublimate. Decomposition begins at about 2700℃ under vacuum—somewhat soluble in hot acid, insoluble in cold water, relative density 2.25. The compression strength is 170MPa. The maximum operating temperature is 900℃ in the oxidizing atmosphere

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