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

A technology of silicate glass and composite clarifying agent, which is applied in the field of glass manufacturing, can solve problems such as environmental and personal hazards, and achieve the effect of eliminating air bubbles

Active Publication Date: 2012-07-18
成都中光电科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most effective clarifying agent is arsenic oxide or a mixture of arsenic oxide and antimony oxid

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0020] The composite clarifying agent of the present invention, the weight percentage of each component is: silica powder and / or alumina powder 80-89%, barium sulfate and / or calcium sulfate 3-6%, chlor-alkaline earth metal salts (chlorinated Calcium and / or strontium chloride) 4-6%, stannous oxide 4-10%. For sulfates, in the process of melting high-aluminum alkali-free borosilicate glass, the elimination of bubbles is mainly carried out at a temperature above 1500°C. Therefore, sulfates with a decomposition temperature above 1500°C should be preferentially selected and cannot be brought in. An unnecessary element in the glass composition. In the present invention, barium sulfate or calcium sulfate can be selected. Calcium sulfate can be decomposed at 1400℃, and the decomposition temperature is lower than barium sulfate, so barium sulfate is preferred. When calcium chloride is used, since calcium chloride is a highly hygroscopic material, it needs to be used after granulation, ...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C03C1/00
Inventor 彭寿李兆廷何流
Owner 成都中光电科技有限公司
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