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Ion exchange molten salt composition, and tempered cover plate glass and tempering method thereof

A technology of ion exchange and cover glass, which is applied in glass tempering, glass manufacturing equipment, manufacturing tools, etc. It can solve the problems of poor comprehensive performance of tempered cover glass, achieve improved tempering effect, speed up tempering, and prevent volatilization Effect

Active Publication Date: 2017-11-21
DONGXU OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of poor overall performance of the tempered cover glass prepared by the existing tempering method, and provide an ion-exchange molten salt composition, tempered cover glass and a tempering method thereof. By using the preparation method, No molten salt impurities appear during the tempering process, and the ion exchange channels are not blocked. The prepared tempered cover glass has both high hardness and high bending strength

Method used

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  • Ion exchange molten salt composition, and tempered cover plate glass and tempering method thereof

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specific Embodiment approach

[0044] According to a specific embodiment of the present invention, the tempering method of the cover glass includes:

[0045] (1) Stir the weighed ion-exchange molten salt composition evenly into a tempering furnace, heat to 300-450°C, and after fully melting, introduce 0.1- 1 part by weight of alumina powder, then fully stirred, and left to stand for 6-24h.

[0046] (2) Polish all the surfaces and corners of the cover glass to be tempered to prevent the glass from bursting due to temperature difference. Put the cleaned cover glass to be tempered into an annealing furnace and slowly heat it to 200-300°C.

[0047] (3) Quickly transfer the cover glass to be tempered to the tempering furnace, fix it on the bracket in the tempering furnace, and turn on the ultrasonic wave. The cover glass to be tempered is subjected to ion exchange at 300-450° C. for 2-5 hours.

[0048] (4) Take the cover glass out of the ion-exchange molten salt, put it in an annealing furnace at 200-300°C, cl...

Embodiment 1

[0061] (1) Configuration of ion exchange molten salt composition

[0062] According to the composition of Table 2, 2000 g of the ion exchange molten salt composition was prepared, and the mixture was fully stirred to make it evenly mixed.

[0063] (2) Tempered

[0064] Weigh 2000g of the ion-exchange molten salt composition, stir it evenly, put it into a tempering furnace, heat it to 400°C and fully melt it, introduce 20g of alumina powder into the molten salt solution, stir it fully, and let it stand for 10 hours.

[0065] Polish and clean the surface and corners of the cover glass to be tempered. Put the cleaned cover glass to be tempered into an annealing furnace, preheat the cover glass at a heating rate of 10°C / min, preheat to 300°C and keep at a constant temperature for 30min.

[0066] Then transfer the cover glass to the tempering furnace, fix it on the bracket in the tempering furnace, and carry out ion exchange at 350°C for 3 hours. This process is carried out under...

Embodiment 2-20

[0070] According to the method of Example 1, the difference is that according to the composition and preparation conditions in Table 2, ion-exchange molten salt compositions were respectively prepared to obtain a tempered cover glass.

[0071] The mechanical properties of the obtained tempered cover glass were measured, and the results are shown in Table 2.

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Abstract

The present invention relates to the technical field of cover plate glass strengthening treatment, and discloses an ion exchange molten salt composition, and a tempered cover plate glass and a tempering method thereof. The ion exchange molten salt composition contains, by weight, 80-99.5% of KNO3, 0.1-15% of K2CO3, and 0.1-5% of a rare earth oxide. The tempering method comprises: heating the ion exchange molten salt composition to melt so as to obtain a molten liquid, and carrying out ion exchange on a cover plate glass to be tempered in the obtained molten liquid. With the method of the present invention, the tempering effect can be significantly improved, and the tempered cover plate glass with advantages of high hardness and high bending strength can be obtained.

Description

technical field [0001] The invention relates to the technical field of cover glass strengthening treatment, in particular to an ion-exchange molten salt composition, a tempered cover glass and a tempering method thereof. Background technique [0002] As an advanced electronic input device, the touch screen has many advantages such as simplicity, convenience, fast response, space saving and easy man-machine communication. The thickness of the cover glass used in the touch screen is ultra-thin glass, which is widely used in the field of electronic products because of its good flatness, optical properties, electrical insulation, heat resistance stability, and chemical resistance. However, when the cover glass is used as a touch screen without tempering, it cannot be directly applied to electronic devices due to its defects such as poor pressure resistance, low mechanical strength, and fragility. The strength of the cover glass, and finally get the toughened cover glass. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B27/03C03C21/00
CPCC03B27/03C03C21/002
Inventor 沈玉国徐兴军李俊锋张广涛闫冬成王丽红郑权
Owner DONGXU OPTOELECTRONICS TECH CO LTD
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