Glass product strengthening method
A glass product and product technology, applied in the field of glass product strengthening, can solve the problems of low salt bath life and low production efficiency, achieve high surface CS value, strong crack resistance, and improve production efficiency.
Active Publication Date: 2021-08-27
CHONGQING XINJING SPECIAL GLASS CO LTD
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Problems solved by technology
[0004]
In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a strengthening method for glass products to solve the problem that the salt bath can only provide sufficient stress effect on a small number of batches of glass in the prior art and the life of the salt bath is low. , the problem of low production efficiency
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[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] One, the relevant special names and relevant measuring methods involved in the present invention are explained as follows
[0023] As used herein, the terms "glass article" are used in their broadest sense to include any object made in whole or in part of glass, including glass ceramics. The glass articles described herein can be formed from alkali aluminosilicate glass compositions that are readily strengthened by ion exchange. Such compositions generally contain SiO 2 、Al 2 o 3 , at least one alkaline earth metal oxide and one or more alkali metal oxides (such as Na 2 O and / or K 2 O) combination.
[0024] Strengthened glass: It is chemically tempered glass after high temperature ion exchange process. Alkali metal ions with a large ionic radius in the high-temperature molten salt replace the alkali metal ions with a small ionic radius in ...
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Abstract
The invention discloses a glass product strengthening method which comprises the following specific steps: a, providing a glass product containing lithium, aluminum and silicon, and placing the glass product in a salt bath which contains sodium nitrate and is in a molten state for ion exchange; and b, sequentially placing the glass product treated in the step a in a first salt bath and a second salt bath for ion exchange, and obtaining the strengthened glass product; wherein the first salt bath and the second salt bath at least comprise potassium nitrate in a molten state, and the content of potassium nitrate in the second salt bath is higher than that of potassium nitrate in the first salt bath. The method provided by the invention can provide a better stress effect for the glass product.
Description
technical field [0001] The invention relates to the technical field of glass strengthening technology, in particular to a method for strengthening glass products. Background technique [0002] At present, glass is widely used in transparent products (electronic display screens, mobile phone covers, etc.), but the high brittleness and poor thermal stability of ordinary glass lead to limitations in the application of ordinary glass. Now, the strength, thermal stability and safety of glass can be improved by strengthening, and strengthening is divided into chemical strengthening and physical strengthening, among which chemical strengthening is to improve the strength of glass by changing the chemical composition of the glass surface. In general, the glass is strengthened by ion exchange method. This method is to exchange other alkali metal ions with the alkali metal ions on the surface of the glass to form an ion exchange layer on the surface, so that the glass is in the tensio...
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IPC IPC(8): C03C21/00
CPCC03C21/002Y02P40/57
Inventor 袁小彬覃文城何程尧姜宏胡伟谈宝权
Owner CHONGQING XINJING SPECIAL GLASS CO LTD