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Method for improving strength of glass

A glass and strength technology, applied in the field of improving the strength of glass, can solve the problems of difficult industrialized production and the inability to reliably increase the strength of glass, and achieve the effects of improving the surface condition, increasing the strength and improving the surface quality.

Inactive Publication Date: 2010-02-17
BYD CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the disadvantages that the existing method cannot reliably increase and maintain the strength of the strengthened glass, and is difficult to be used in industrialized production, and provides a method that can reliably improve and maintain the strength of the strengthened glass and can be easily processed. Method for increasing glass strength in industrialized production

Method used

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  • Method for improving strength of glass
  • Method for improving strength of glass

Examples

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Effect test

reference example 1

[0026] The ASAHI (Asahi Glass Blue) glass of 940 mm (length) × 510 mm (width) × 1.3 mm (thickness) was cut by the automatic glass cutting machine model WGA-500 produced by Guangzhou Huanyu Glass Machinery Factory, and used The desktop edging forming machine model F-80 produced by Jiangxi Zhonghang Optical Equipment Co., Ltd. and the double-sided grinding and thinning machine model YJ2M9S-5L produced by Hunan Yujing Machinery Industry Co., Ltd. process the glass into 66.3 (length) Glass in mm x 42.8 mm (width) x 0.88 mm (thick) dimensions. 300 pieces of the above glass were produced.

Embodiment 1

[0028] The present invention is used to illustrate the method for increasing the strength of glass provided by the present invention.

[0029] (1) Polishing: The glass from the above reference example 1 was polished using a YJ2M9S-5L Yujing polishing machine. The polishing includes 10 rpm polishing under the condition of 0.03 MPa light pressure and 20 rpm, and then the machine pressure is increased to 0.1 MPa medium pressure and 2400 rpm polishing under the condition of 45 rpm. Described polishing liquid is the aqueous solution that buys from Zhicheng 620 polishing powder, and the weight of described water is 100 grams, and the weight of described polishing powder is 35 grams, and described polishing powder contains powdery red iron oxide, tin dioxide, Aluminum oxide, barium carbonate, chalk, clay, diatomaceous earth and cerium oxide, the particle diameter of the cerium oxide is 2-8 nanometers, and the amount of the cerium oxide is 70% by weight of the polishing powder. After...

Embodiment 2

[0035]The present invention serves to illustrate the method of obtaining glass with increased strength according to the invention.

[0036] The glass from Reference Example 1 above was strengthened according to the method of Example 1, except that,

[0037] In step (3), the polishing includes polishing at a medium pressure of 0.1 MPa and a rotational speed of 45 rpm for 60 rpm, and the obtained glass has a size of 66.3 mm (length) × 42.8 mm (width) × 0.7992 mm (thick).

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Abstract

The invention provides a method for improving the strength of glass. The method comprises the following steps: performing chemical strengthening on the glass; and performing mechanical polishing on atleast one surface of the glass after the chemical strengthening. According to the method for improving the strength of the glass, the strength of the glass can be greatly improved and reliably maintained only by removing a defective layer in a certain thickness on the surface of the strengthened glass; and the method has simple operation and convenient control, and is convenient for industrialized production. In addition, the method effectively reduces a defective part on the surface of the glass by performing the mechanical polishing, can better improve the strength of the glass without performing chemical strengthening repeatedly on the glass, and reduce the corrosion to the glass and the damage to the optical performance of the glass by chemical drugs so that the glass has better luster and transmittance. The glass strengthened by the method provided by the invention is particularly suitable for a mobile phone display window.

Description

technical field [0001] The invention relates to a method for increasing the strength of glass. Background technique [0002] Glass is a brittle material with low tensile strength. The strength of brittle materials depends largely on its surface structure. Although the surface of glass looks complete and smooth, there are actually a large number of microcracks. The actual strength of ordinary flat glass is only about 50-80 MPa, while the theoretical strength of glass can reach 10,000-20,000 MPa. The huge difference of 2-3 orders of magnitude is mainly due to the defects inside and outside the glass. The impact of glass surface defects, especially cracks, is more significant. Therefore, if the influence of these surface microcracks can be eliminated, the tensile strength of the glass can be significantly improved. The strength of glass can be increased by strengthening glass. Strengthening methods can be roughly divided into physical methods and chemical methods. The meth...

Claims

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Application Information

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IPC IPC(8): C03C17/00
Inventor 游浪梁卫卓许晓平
Owner BYD CO LTD
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