Chemically strengthened glass, and preparation method and application thereof

A glass-strengthening and chemical technology, applied in the field of chemically-strengthening glass and its preparation, can solve problems such as glass strength reduction and self-explosion, and achieve the effect of improving drop performance and increasing atomic gaps

Active Publication Date: 2020-03-31
SICHUAN HONGKE INNOVATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the ion exchange depth increases, more alkali metal elements with larger ionic radii will be introduced into the glass. If there are too many large-diameter alkali metal ions participating in the ion exchange, after the ion exchange, the glass will cool down, and it will be damaged due to extrusion. If the plug effect is too strong, the strength of the glass will decrease or there will be a risk of self-explosion

Method used

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  • Chemically strengthened glass, and preparation method and application thereof
  • Chemically strengthened glass, and preparation method and application thereof
  • Chemically strengthened glass, and preparation method and application thereof

Examples

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preparation example Construction

[0056] The second aspect of the present invention provides a method for preparing chemically strengthened glass, comprising: after mixing the raw materials for preparing the chemically strengthened glass, sequentially melting, forming, annealing and cooling, and cutting to obtain original glass;

[0057] Putting the original glass into a strengthening solution for chemical strengthening to obtain a chemically strengthened glass; wherein, the chemical strengthening process includes at least lithium-sodium exchange and sodium-potassium exchange;

[0058] The chemically strengthened glass has an ion exchange layer with a depth D obtained through the chemical strengthening, wherein 250 μm≤D≤350 μm;

[0059] Relative to the original glass, K in the ion exchange layer 2 The average increase of O is 0.1% to 0.25% by weight, preferably 0.12% to 0.23% by weight.

[0060] The meaning of including at least lithium-sodium exchange and sodium-potassium exchange above is that one or more l...

Embodiment 1-8 and comparative example 1-11

[0091] The raw materials and content in the following examples and comparative examples are shown in Table 1 below, the process parameters (i.e. strengthening temperature and time) of the chemical strengthening process are shown in Table 2 below, and the performance test data of the glass made in the following examples and comparative examples As shown in Table 2 below. The preparation process in the following examples and comparative examples is for example:

[0092] The preparation method of chemically strengthened glass is:

[0093] 1) Preparation of raw glass:

[0094] Proportioning is carried out according to the component ratio of each raw material. At the same time, put the mixed raw materials into a sealed bag, mix them evenly in the sealed bag, and then pour them into a platinum crucible to melt, melt, pour the molten glass liquid into a metal mold, and Put the glass together with the metal mold into the annealing furnace for precision annealing and cooling. The ann...

Embodiment 6

[0107] The Na of the glass section that obtains after lithium-sodium exchange among the embodiment 6 2 The change curve of O increment is as follows figure 2 As shown, the abscissa is the depth of the glass surface, that is, the lithium-sodium exchange layer depth D of the glass obtained by lithium-sodium exchange 1 , the fitting equation of the curve is y=0.00002x 2 -0.0144x+2.9953, when Na 2 When the O increment is 0, the surface depth value of the glass is the boundary between the original glass and the lithium-sodium exchange layer, thus obtaining the depth value D of the lithium-sodium exchange layer 1 , the curve fitting equation is integrated to obtain the total increment in the lithium-sodium exchange layer, and the total increment is divided by the depth D of the lithium-sodium exchange layer 1 , that is, Na in the lithium-sodium exchange layer 2 Average increment of O.

[0108] K of the chemically strengthened glass section after sodium potassium exchange in em...

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Abstract

The invention relates to the technical field of glass production, and discloses chemically strengthened glass, and a preparation method and an application thereof. The chemically strengthened glass comprises original glass and an ion exchange layer which is formed on the surface of the original glass and has a depth of D, wherein D is no less than 250 [mu]m and no more than 350 [mu]m; and comparedwith the original glass, the ion exchange layer has a K2O average increment of 0.1 wt% to 0.25 wt%, preferably 0.12 wt% to 0.23 wt%. Compared with the prior art, the chemically strengthened glass provided by the invention has deeper ion exchange layer depth; and the preparation method provided by the invention limits the ion amount of ion exchange by sequentially carrying out lithium-sodium exchange and sodium-potassium exchange, so reduction of glass performance or spontaneous explosion caused by excessive extrusion effect generated by ion exchange is avoided. Compared with the prior art, the chemically strengthened glass provided by the invention has better drop-resistant performance, bending-resistant performance and impact-resistant performance.

Description

technical field [0001] The invention relates to the technical field of glass production, in particular to a chemically strengthened glass and its preparation method and application. Background technique [0002] At present, the strengthened glass used to protect smart terminals mainly includes primary chemically strengthened glass and conventional secondary strengthened glass, which are excellent in resistance to falling ball impact, bending resistance, and scratch resistance. However, due to the shallow ion-exchange layer of these glasses for chemical strengthening (the depth of the ion-exchange layer of the primary strengthened glass is less than 100 μm, and the depth of the ion-exchange layer of the conventional secondary strengthened glass is about 200 μm), the anti-drop performance is poor. , especially when the mobile terminal is dropped to a rough surface, conventional tempered glass has very limited protection for the mobile terminal. [0003] Chemically strengthene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00C03C3/085
CPCC03C21/002C03C3/085
Inventor 李青李赫然王世友李德宝宫汝华何根董俊威张俊李东李光华
Owner SICHUAN HONGKE INNOVATION TECH CO LTD
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