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Reinforced glass, reinforced glass substrate, and method for producing the same

A glass substrate, glass technology, applied in glass manufacturing equipment, glass molding, glass molding and other directions, can solve problems such as increasing grinding steps, and achieve the effects of cheap supply, high mechanical strength, and excellent devitrification resistance

Active Publication Date: 2012-10-10
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, an additional grinding step must be added after the glass sheet is formed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] The following examples illustrate the present invention.

[0103] Tables 1 to 3 show the glass composition and characteristics of the examples (test samples No. 1 to 12) of the present invention. In addition, "not" in the table means not measured.

[0104] [Table 1]

[0105]

[0106] [Table 2]

[0107]

[0108] [table 3]

[0109]

[0110] Each test sample in Tables 1 to 3 was prepared as follows. First, in order to obtain the glass compositions in the table, glass raw materials were blended and melted at 1580° C. for 8 hours in a platinum boat. The molten glass is then poured onto a carbon plate to form a sheet. Various characteristics were evaluated about the obtained glass substrate.

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PUM

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Abstract

Disclosed is a reinforced glass having a compressive stress layer on the surface. This reinforced glass is characterized by containing, in mol%, 40-80% of SiO2, 5-15% of Al2O3, 0-8% of B2O3, 0-10% of Li2O, 5-20% of Na2O, 0.5-20% of K2O and 0-10% of MgO, with Al2O3 + MgO being 8-16.5%. This reinforced glass is also characterized in that, in molar ratio, (Li2O + Na2O + K2O) / Al2O3 is 1.4-3, Na2O / Al2O3 is 1-3 and MgO / Al2O3 is 0-1. The reinforced glass is further characterized in that it does not substantially contain As2O3, PbO and F.

Description

technical field [0001] The present invention relates to a toughened glass substrate, and particularly relates to a toughened glass substrate suitable for a cover glass of a mobile phone, a digital camera, a PDA (mobile phone terminal), a solar cell, or a touch panel display. Background technique [0002] Devices such as mobile phones, digital cameras, PDAs or touch panels are becoming more and more popular. [0003] Conventionally, resins such as acrylic have been used as protective members for protecting displays in these applications. However, since the Young's modulus of the acrylic resin is low, when the display is pressed with a finger or the like, the acrylic resin substrate may bend and display defects may occur when the display is touched. In addition, there is a problem that blemishes are easily generated and visibility is easily deteriorated. One of methods for solving these problems is a method of using a glass substrate as a protective member. Glass substrates...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/083C03B17/04C03C3/085C03C3/087C03C3/091C03C21/00
CPCC03B17/064C03C3/085C03C21/002C03C3/083G02F2001/133331C03C3/091G02F1/133331Y10T428/315
Inventor 村田隆
Owner NIPPON ELECTRIC GLASS CO LTD