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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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 indust

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Reference example 1

[0026] The 940 mm (length) × 510 mm (width) × 1.3 mm (thickness) ASAHI (Asahi Glass Blue) glass was cut by an automatic glass cutting machine model WGA-500 produced by Guangzhou Huanyu Glass Machinery Factory, and used The desktop edging 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 with dimensions of mm×42.8 mm (width)×0.88 mm (thickness). 300 pieces of the above glass were prepared.

Example Embodiment

[0027] Example 1

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

[0029] (1) Polishing: A Yujing polishing machine of model YJ2M9S-5L was used to polish the glass from Reference Example 1 above. The polishing includes polishing at 10 revolutions under the conditions of light pressure of 0.03 MPa and a rotation speed of 20 revolutions / minute, and then polishing at 2400 revolutions under the conditions of a medium pressure of 0.1 MPa and a rotation speed of 45 revolutions / minute. The polishing liquid is an aqueous solution purchased from Zhicheng 620 polishing powder, the weight of the water is 100 grams, the weight of the polishing powder is 35 grams, and the polishing powder contains powdered iron oxide red, tin dioxide, Alumina, 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 ...

Example Embodiment

[0034] Example 2

[0035] The present invention is intended to explain the method of obtaining glass with increased strength according to the present invention.

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

[0037] In step (3), the polishing includes polishing at 60 revolutions under the conditions of a medium pressure of 0.1 MPa and a rotation speed of 45 revolutions per minute, and the obtained glass size is 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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