Compound clarifying agent for high-aluminum alkali-free borosilicate glass

Abstract

The invention discloses a compound clarifying agent for high-aluminum alkali-free borosilicate glass and belongs to the field of glass manufacturing. The compound clarifying agent comprises the following components by weight percent: 80-89% of thinning agents, 3-6% of sulfates, 4-6% of chlorine alkaline earth salts and 4-10% of stannous oxides. The invention provides a better clarifying agent for a fusing process of the high-aluminum alkali-free borosilicate glass, so as to facilitate the discharging of air bubbles during the glass fusing process and increase the yield.

Description

technical field [0001] The invention belongs to the field of glass production, in particular to the formulation of auxiliary components of high-alumina alkali-free borosilicate glass. Background technique [0002] In the manufacturing process of glass substrates for liquid crystal displays, various raw materials need to be melted at high temperature, cooled and drawn into shape. During high-temperature melting, various raw materials will be brought into the air, and carbonate and nitrate raw materials will release a large amount of gas after high-temperature chemical reaction. If these gases remain in the glass, serious defects will be formed and affect glass substrate products. appearance and performance. The use of fining agents will allow most of the air bubbles to escape from the interior of the glass. [0003] There are various materials that can be used as fining agents in the glass manufacturing process. For high-alumina alkali-free borosilicate glass, due to the s...

AI Technical Summary

Problems solved by technology

The most effective clarifying agent is arsenic oxide or a mixture of arsenic oxide and antimony oxide, but arsenic oxide is a highly toxic drug, which is extremely harmful to the environment and people