Chemical strengthening method of glass, strengthened glass, application and display device

A technology for strengthening glass and display devices, which is applied in the fields of chemical strengthening of glass, strengthened glass, applications and display devices, and can solve problems such as difficult to protect electronic products, difficult to prepare comprehensive performance chemically tempered glass, damage to screens or cover plates, etc.

CN111825345APending Publication Date: 2020-10-27QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-10-27

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Abstract

The invention relates to a chemical strengthening method of glass, strengthened glass, application and a display device. The strengthening method of glass comprises the following steps of: carrying out first chemical strengthening treatment on the glass in a first molten salt at a temperature of 360DEG C-440DEG C for 2h-6h, wherein the mass percentage content of sodium nitrate in the first moltensalt is greater than or equal to 20%; carrying out secondary chemical strengthening treatment on the glass in a second molten salt at a temperature of 380DEG C-420DEG C for 1h-4h, wherein the mass percentage of potassium nitrate in the second molten salt is greater than or equal to 80%; and carrying out annealing treatment on the glass at a temperature of 260DEG C-300DEG C for 1h-4h. The glass trengthened by the method is good in mechanical shock resistance and high in falling breaking height, and the situation that a screen or other cover plate glass is broken due to the fact that intelligentequipment like a mobile phone accidentally falls onto the ground can be effectively avoided or reduced.
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Description

technical field

[0001] The invention relates to the field of glass, in particular to a chemical strengthening method for glass, strengthened glass, application and display device. Background technique

[0002] Sheet glass is used, for example, as a cover glass for protecting liquid crystal screens of mobile phones, PDAs (PDAs), digital cameras, and flat panel displays (FPDs) or as cover glasses for casings of portable terminal devices. In recent years, these cellular phones, PDAs, and the like have tended to be thinner and more functional, and require high mechanical strength. Therefore, tempered glass chemically strengthened on a thin glass substrate is used as a cover glass.

[0003] This tempered glass is usually chemically strengthened by ion exchange treatment. Ion exchange treatment usually includes: immersing the glass in a molten salt containing potassium and / or sodium at a temperature of 350°C to 550°C, thereby making the sodium ions and lithium ions on the glass ...

Examples

Embodiment 1～ Embodiment 11

[0076] The concrete process of the first chemical strengthening treatment of the glass of embodiment 1~embodiment 11 is as follows:

[0077] The first molten salt was prepared by mixing sodium nitrate and potassium nitrate according to the ratio (mass percentage) of sodium nitrate and potassium nitrate in Examples 1 to 11 shown in Table 1. Soak the above-mentioned polished glass sheets in the first molten salt of Examples 1 to 11 at 400° C. for 4 hours, so that the alkali metal ions in the glass and the alkali metal ions in the molten salt can undergo sufficient chemical ion exchange, By exchanging ions with large radii for ions with small radii, a jamming effect is generated to generate compressive stress and increase the strength of the glass. Wherein, embodiment 10 and embodiment 11 are comparative examples. After the first chemical treatment, the stress tester FSM6000UV and SLP1000 of Orihara Japan measured the surface compressive stress value CS0, the compressive stress ...

Embodiment 46～ Embodiment 50

[0108] The glass compositions of Examples 46 to 50 are specifically shown in Table 6. Wherein, embodiment 48 to embodiment 50 are comparative examples.

[0109] The preparation process of the glass of Example 46-Example 50 is the same as that of the glass of Example 1, and will not be repeated here.

[0110] The chemical strengthening process of the glass of embodiment 46~embodiment 50 is all the same, specifically as follows:

[0111] (1) The first chemical strengthening treatment: the same as the first chemical strengthening treatment process in Example 1, specifically: the glass is subjected to the first chemical strengthening treatment in the first molten salt at a temperature of 400 ° C for 4 hours, and the second A molten salt is sodium nitrate with a mass percent content of 100%.

[0112] (2) The second chemical strengthening treatment: the process is the same as that of the second chemical strengthening treatment in Example 22, specifically: the glass after the first...