Calcined Zinc Oxide
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Calcined zinc oxide, commonly known as “calcined zinc,” is produced by refining primary zinc oxide (raw zinc) obtained via the direct or indirect process through calcination at a constant high temperature of 1100–1300°C. It is a heavy, stable inorganic powder; Unlike ordinary raw zinc and active zinc oxide, it features a highly stable crystal structure, low reactivity, and low loss on ignition, making it a core raw material specifically used in ceramic glazes, glass, and electronic materials. It appears as a uniform powder ranging from white to very pale yellow, free of lumps and impurities; it has high density, high bulk density, and excellent flowability; it is insoluble in water but soluble in strong acids, strong alkalis, and ammonium salt solutions; its melting point is 1975°C, and it exhibits exceptional thermal stability.
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