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Process for preparing chemically strengthened glass

A technology of chemically tempered glass and production process, applied in the direction of glass tempering, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of easy deformation of glass, optical distortion, and a large amount of volatile matter.

Inactive Publication Date: 2002-11-27
SHANGHAI YAOHUA PILKINGTON GLASS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high temperature ion exchange is easy to produce light distortion, and glass is easy to deform
During the production process, the temperature of the molten salt is high, which produces a large amount of volatile matter, pollutes the environment, and the molten salt is prone to failure

Method used

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  • Process for preparing chemically strengthened glass
  • Process for preparing chemically strengthened glass

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Experimental program
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Embodiment Construction

[0016] It can be seen that the ion exchange time has been shortened by three to four times, the ion exchange depth has been increased by nearly ten times, and the surface ion concentration has been increased by more than eight times, which greatly improves the production efficiency.

[0017] Accompanying drawing is with common molten salt and with mixed molten salt of the present invention, has carried out the comparative test curve of reaction temperature, can find out from figure, adopts the required temperature of molten salt reaction of formula of the present invention to reduce slightly, and efficiency obviously increases, Energy saving.

[0018] The mixed molten salt prepared by the present invention has the aforementioned important effects, and is based on the following main principles: 1. To speed up the ion exchange rate, the network structure of the glass surface must first be made open, and the mixed molten salt of the present invention has a disconnected part...

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Abstract

A chemically toughened glass is prepared through preparing fused salt from fused salt of potassium nitrate, potassium hydroxide, Al2O3 and diatomite, heating it to 400-500 deg.C, heating cleaned glass to 350 deg.C for 30 min, immersing the glass in the said fused salt at 400 deg.C for 3-8 hr, slowly taking out entering an annealing oven its temp. very close to that of fused salt, and then annealing to room temp. Its advantages are high productivity, high surface stress, thin thickness (less than 3mm), and high smoothness.

Description

technical field [0001] The invention relates to a low-temperature chemically tempered glass production process and a formula of molten liquid for reaction, belonging to the field of building materials. Background technique [0002] Glass surface enhancement technology includes not only the usual wind tempering (air jet enhancement) measures, but also chemical tempering technology. The essence of chemical tempering technology is to change the structure of the glass surface, thereby enhancing the strength of the glass surface. Chemical toughening is usually divided into: 1) Alkylation treatment on the glass surface 2) Plating a layer of vitreous material with a low expansion coefficient on the glass surface 3) Alkali metal ion exchange. The chemical toughening mentioned here refers to ion exchange strengthening. Usually, ion exchange enhancement methods are divided into two methods: high temperature ion exchange and low temperature ion exchange. [0003] High-temperature io...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00
CPCC03C21/002
Inventor 潘伟谢丽美周书珍李志进
Owner SHANGHAI YAOHUA PILKINGTON GLASS GROUP
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