Clarification method of alumina silicate glass melts

Abstract

The invention discloses a clarification method of alumina silicate glass melts. The method comprises physical treatment and chemical treatment to the alumina silicate glass melts, wherein the physical treatment is to control the air pressure of clarifying parts of the alumina silicate glass melts to 100 to 9*10<4>Pa; and the chemical treatment is to add a composite clarifying agent to the alumina silicate glass mixture, wherein the composite clarifying agent is the composition formed by mixing two or more than two of sulfate or / and nitrate of K, sulfate or / and nitrate of Na and sulfate or / and nitrate of Li with two or more than two of Sn oxide, Sb oxide and Ce oxide. According to the clarification method, the composite clarifying agent is adopted and realizes gradient chemical clarification under different temperatures, so that the clarifying agent in the glass melts can be molten at different temperature ranges during melting, and gas is continuously generated by the glass melts, and the clarifying time of the glass melts is prolonged; and the physical clarifying way under reduced pressure is adopted while the chemical clarifying way is carried out, so that the bubble can be faster generated and overflowed, and the clarifying effect of the high-viscosity alumina silicate glass can be optimized.

Description

technical field [0001] The invention belongs to the field of glass manufacturing, specifically a clarification method for aluminosilicate glass, which improves the growth and overflow rate of bubbles in the melting process of glass liquid, thereby improving the clarification quality of glass liquid and improving the performance index of glass original sheets . Background technique [0002] In the past ten years, the electronic information industry has developed by leaps and bounds. Portable electronic devices such as mobile phones, notebook computers and even tablet computers have entered people's lives more and more, bringing convenience to human production and life. No matter how different the functions of these electronic devices are, it is inevitable to use glass as the main component of the display system. The traditionally used soda-lime-silica glass has poor mechanical strength and wear resistance, and cannot be used for a long time and in Use in special circumstance...

AI Technical Summary

Problems solved by technology

[0005] Atmospheric pressure clarification is basically used in the current float glass industry, which can meet the clarification technical requirements of ordinary glass. However, for the reality that tiny bubbles are difficult to overflow during the preparation of special glass, normal pressure clarification is difficult to fully meet the production and preparation requirements.