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Chemically strengthened glass with high safety stress and testing method

A technology for strengthening glass and safety stress, which is applied in glass tempering, glass manufacturing equipment, force/torque/power measuring instruments, etc., to achieve low production cost, good scratch resistance, and easy popularization and application.

Active Publication Date: 2022-02-22
CHONGQING XINJING SPECIAL GLASS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem of high safety and high pressure stress symbiosis, and to provide a chemical with high safety stress Reinforced glass, so that when the glass is impacted, it can avoid the fragmentation of glass fragments

Method used

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  • Chemically strengthened glass with high safety stress and testing method
  • Chemically strengthened glass with high safety stress and testing method
  • Chemically strengthened glass with high safety stress and testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Embodiment 1: A kind of preparation method of chemically strengthened glass with high safe compressive stress, comprises the following steps:

[0078] S1: Firstly, accurately weigh according to the ratio of the glass substrate (see Table 1), and then mix the raw materials thoroughly, then heat them at a high temperature of 1630°C for 4 hours to melt them to obtain molten glass.

[0079] S2: Cast the molten glass into a preheated stainless steel mold, then put it into an annealing furnace, and perform a long-term gradient annealing around the annealing point to eliminate the internal stress of the glass. After the annealed glass brick is finished, the six sides are cut to obtain a glass brick with a suitable size, and then the wire cutting machine, CNC engraving machine, and flat grinding and polishing machine are used for size precision cutting, flat grinding, and edge sweeping to obtain the precursor glass plate;

[0080] S3: preheating the precursor glass obtained in...

Embodiment 2～5

[0084] Adopt the same method as in Example 1 to obtain the precursor glass plate, the difference is: (1) the formula of the glass substrate is different (Table 1); (2) the test results are different (see Table 2)

[0085] Table 1

[0086]

[0087] Note: "-" means that the component is not contained in the precursor glass.

[0088] Table 2

[0089]

[0090] table 3

[0091]

[0092] Note: "-" indicates that the glass product has not been subjected to this step.

[0093] The results show that, referring to Table 2, the drop height of the whole machine for the impact strength of Examples 1 to 5 of the present invention is between 1.2 and 1.8 m. Finally, the glass damage state is observed, and only 2-3 cracks are extended instead of stars. Explosion, avoiding the influence of external force on the destructive state to the greatest extent. The strengthened glass is fixed with a Vickers diamond drill bit and a guide rail to ensure that the drill bit impacts the glass su...

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Abstract

The invention discloses chemically strengthened glass with high safety stress and a testing method. The chemically strengthened glass is obtained by performing ion exchange on precursor glass; and when the following conditions are met: the precursor glass is placed in a salt bath to be subjected to chemical ion exchange for 1 hour at the temperature of 440 DEG C, the mass ratio of sodium salt in the salt bath is the larger value of two numerical values a and b, a is 5 wt%, and b is the molar ratio of K2O / 2(K2O+Na2O+Li2O) in the glass base material, the surface compressive stress of the obtained glass reaches more than 500MPa, and the depth DOL-0max of a compressive stress layer is more than 17% of the thickness of the glass. Through precise control of precursor glass components and sodium-containing salt bath conditions, the glass is strengthened to reach enough surface compressive stress, and has very high network structure strength, so that the compressive stress and tensile stress of the obtained strengthened glass are in the best state, and the toughened glass has the maximum composite compressive stress in a tensile stress safe state. The chemically strengthened glass has the advantages of high strength, high hardness, high scratch resistance and good drop resistance.

Description

technical field [0001] The invention belongs to the technical field of glass products, in particular to a chemically strengthened glass with high safety stress and a testing method. Background technique [0002] With the rapid development of the electronic information industry, electronic products such as mobile phones, wristbands, and tablet computers have increasingly become necessities in daily life. These electronic products all have display screens including glass covers. Due to the portability of the product, accidents of consumers dropping it while carrying or using it happen from time to time. Protective glass is often broken due to surface tensile stress when it is dropped or collided with an object, and damage due to damage caused by collisions between the surface and sharp-edged objects, etc., so consumers purchase products At the same time, products with good crashworthiness will be more favored under the condition of satisfying the basic functions, so the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00C03B27/03G01L5/00H05K5/02
CPCG01L5/00C03B27/03C03C21/002H05K5/0217C03C21/00
Inventor 姜宏黄义宏覃文城王慧娟谈宝权李铭白一波胡伟
Owner CHONGQING XINJING SPECIAL GLASS CO LTD
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