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Chemical strengthening method of glass and glass prepared by chemical strengthening method

A glass and chemical technology, applied in the field of chemical strengthening methods and the glass produced, can solve the problems that glass products cannot meet customer reliability requirements, can not meet the requirements of customers, and achieve improved surface CS value, good impact resistance, and improved reliability. Effects of sex test results

Pending Publication Date: 2021-12-21
LENS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the Na+ and Li+ present in the secondary ion exchange furnace water in the existing processing method make the highest CS value of the product after the secondary ion exchange is only 850MPa, which cannot meet the customer's request for a higher CS value, resulting in of glass products cannot meet customer reliability requirements

Method used

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  • Chemical strengthening method of glass and glass prepared by chemical strengthening method
  • Chemical strengthening method of glass and glass prepared by chemical strengthening method
  • Chemical strengthening method of glass and glass prepared by chemical strengthening method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] A method for chemically strengthening glass, the strengthening method comprising the following steps:

[0102] (a) Preheating for the first time: Preheat the glass to be processed at 300°C for 120 minutes;

[0103] (b), the first ion exchange: ion-exchange the first preheated glass in potassium and sodium mixed molten salt at 415°C for 130 minutes;

[0104] The potassium-sodium mixed molten salt of the first ion exchange is a mixed molten salt of sodium nitrate and potassium nitrate, and the content of sodium nitrate in the mixed molten salt is 50wt%;

[0105] (c) Soaking in water in multiple slots: Pull the glass after the first ion exchange treatment from the unloading car to the air-cooled area within 1 minute, and blow it through a high-power fan to cool it rapidly for 15 minutes; then in the first slot to the second slot Soak in the water of five tanks, wherein:

[0106] Soaking in the first tank is bubbling in pure water at 65°C for 15 minutes;

[0107] Soaking...

Embodiment 2～6 and comparative example 1～3

[0117] A kind of chemical strengthening method of glass, described strengthening method comprises the following steps, specifically see table 1, table 2:

[0118] Table 1:

[0119]

[0120]

[0121] Table 2:

[0122]

[0123]

experiment example 1

[0144] In order to show that the strengthened glass prepared by the chemical strengthening method of the present application can greatly increase the surface stress CS value of the glass compared with the existing secondary strengthened glass, and at the same time its reliability strength can also be greatly increased by 20-30%. The tempered glass prepared in Examples 1-6 and Comparative Examples 1-6 is now used for stress value and reliability performance testing, and the specific results are shown in the following table:

[0145] table 3:

[0146]

[0147]

[0148] Note: The above DOL is the depth of the surface stress layer; DOC is the total depth of the ion exchange stress layer; CS is the surface compressive stress; CSK is the corner compressive stress; CT is the central tensile stress; 4PB is the four-point bending test; ROR is the central static pressure test ; The sandpaper is dropped for the whole machine.

[0149] It can be seen from the above experimental exa...

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Abstract

The invention provides a chemical strengthening method of glass and the glass prepared by the chemical strengthening method, and relates to the technical field of chemically strengthened glass. According to the strengthening method, a pressure stress layer is formed on the surface layer of the glass mainly through ion exchange treatment, and the chemically strengthened glass is prepared. The ion exchange treatment is carried out in three times, and the molten salt for the first ion exchange and the second ion exchange is potassium-sodium mixed molten salt; and the molten salt for the third ion exchange is more than 99wt% of potassium nitrate molten salt. According to the method, the potassium nitrate molten salt with the concentration larger than 99 wt% is used for conducting third ion exchange on the glass, high-concentration K<+> in the molten salt is massively accumulated on the surface of the glass, and therefore the CS value of the surface of the glass is increased to 1000 MPa or above, the better DOL value of the product is not affected, the appearance of the product is not affected, meanwhile, the CS value of the surface of the glass is greatly increased, and the glass product has better impact resistance.

Description

technical field [0001] The invention relates to the technical field of chemically strengthened glass, in particular to a method for chemically strengthening glass and the glass prepared therefrom. Background technique [0002] Chemically strengthened glass products are widely used in electronic fields such as mobile phones, watches, computers, and touch panels due to their good light transmission, excellent touch and feel. With the continuous improvement of the bending resistance and hardness requirements of strengthened glass, the strengthening process of glass is becoming more and more complicated. At present, the glass processing industry generally requires strengthened glass products to have a high DOL value (Depth OfLayers: stress layer depth value) and a high CS value (Compressive Stress: surface tensile stress value), and one strengthening generally cannot meet these two values ​​at the same time. Therefore, the user's demand for product performance cannot be met. I...

Claims

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Application Information

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IPC IPC(8): C03C21/00
CPCC03C21/002
Inventor 周群飞肖泽辉
Owner LENS TECH
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