What is the raw material of glass?.
Glass material is complex, but can be divided into main raw materials and auxiliary raw materials according to its function. The main material constitutes the main body of the glass, and determines the main physical and chemical properties of the glass. The auxiliary material endows the glass with special properties and facilitates the manufacturing process.
1. the main raw material of glass(1): the main component of silica sand or borax borax glass is introduced into silica or silica or boron oxide, which alone can melt into a glass body in the combustion, determines the main properties of glass, appropriately called silicate glass or borosilicate glass.(2): the main ingredients of soda soda or salt and mirabilite into glass is sodium, they can with silica sand and other acidic oxides formed in the fusible salt calcination, the fluxing action, the glass is easy to mold. But if the content is too much, the thermal expansion rate of glass will increase, and the tensile strength will decrease.(3) limestone, dolomite, feldspar, etc.: the main component of limestone introduced into glass is calcium oxide, which enhances the chemical stability and mechanical strength of glass. But the content is too much, which makes the glass break and reduce the heat resistance.As a raw material for introduction of Magnesium Oxide, dolomite can improve the transparency of glass, reduce thermal expansion and improve water resistance.Feldspar, as a raw material for introduction of alumina, can control the melting temperature and increase durability. In addition, potassium feldspar can also provide components, improve the thermal properties of glass.(4) broken glass: Generally speaking, not all new materials are used in the manufacture of glass, but the broken glass of 15%--30%.
