Mainly used in chemical industry, Bi salt manufacture, glass coloring, press and heat sensing resistance, lightning arrester, kinescope, fireproofing layer, muclear reactor fuel, electron pottery powder stuff, electrolyte material, photo electricity material, high temperature superconduct material and catalyzer. Specification: Bi2O3: 99.5%min Surface of powder: 18gsm Average granularity: 1um Max Packing: 20kg/drum