... .purity: 99.6% 2. it is widely used in glass, enamel, porcelain, pharmaceutical industry. Property: it is a ... . Large for the glass (optical glass, acid glass, heat-resistant glass, glass fiber insulation materials) industry, to improve the heat glass, transparent performance, increase ... time. application: it is mainly used for the glass manufacture industry,convenient in the enamel ware,the porcelain ...