USE OF UNCONVENTIONAL RAW MATERIALS FOR PRODUCING SHEET GLASS BY VERTICAL DEBITENSE DRAWING

摘要

The use of unconventional raw materials in glassmaking is demonstrated. Their compositions are investigated. The choice of glass composition is based on the fact that molten glass must possess high production characteristics which ensure that the quality of the glass articles is high. Sheet glasses lie in the composition range of the five-component system SiO_2 - Al_2O_3 - CaO - MgO - Na_2O. Silicon dioxide SiO_2 is the main component (about 72%). Different oxides in the composition of glass have an individual effect on the technological and production properties of molten glass, and consequently selecting the optimal composition of glass is a difficult problem. In this connection, the chemical composition of glass is determined by taking account of practical work, supplemented with the results of investigations directed toward further optimization of the compositions.