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Reinforced glass substrate

A technology for tempered glass and substrate, applied in glass forming, glass forming, glass manufacturing equipment and other directions, can solve the problem of difficulty in simultaneously achieving glass ion exchange performance and devitrification resistance, and significantly improving the mechanical strength of glass substrates. Maintaining the mechanical strength of glass substrates, etc.

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

If the glass substrate is polished, microscopic defects tend to occur on the surface of the glass substrate, making it difficult to maintain the mechanical strength of the glass substrate
[0009] Due to such circumstances, it is difficult to achieve both ion exchange performance and devitrification resistance of the glass, and it is difficult to significantly improve the mechanical strength of the glass substrate.

Method used

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  • Reinforced glass substrate
  • Reinforced glass substrate
  • Reinforced glass substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0089] Hereinafter, the present invention will be described based on examples.

[0090] Tables 1 to 7 show examples (sample Nos. 1 to 46) of the present invention and comparative examples (sample Nos. 47 and 48) of the present invention.

[0091] 【Table 1】

[0092]

[0093] 【Table 2】

[0094]

[0095] 【table 3】

[0096]

[0097] 【Table 4】

[0098]

[0099] 【table 5】

[0100]

[0101] 【Table 6】

[0102]

[0103] 【Table 7】

[0104]

[0105] Each sample was produced as follows. First, glass raw materials were blended so as to have the glass compositions shown in Tables 1 to 7, and were melted at 1600° C. for 8 hours using a platinum boat. Then, the molten glass was flowed onto a carbon plate, and formed into a plate shape. Various characteristics were evaluated about the obtained glass substrate.

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Abstract

Provided is a glass substrate satisfying ion exchange performance and devitrification resistance of a glass simultaneously and having higher mechanical strength compared to a conventional glass substrate. A tempered glass substrate which has a compression stress layer on a surface thereof, has a glass composition including, in terms of mole%, 50 to 85% of SiO 2 , 5 to 30% of Al 2 O 3 , 0 to 20% of Li 2 O, 0 to 20% of Na 2 O, 0 to 20% of K 2 O, 0.001 to 10% of TiO 2 , and 15 to 35% of Li 2 O+Na 2 O+K 2 O+Al 2 O 3 , has a (Li 2 O+Na 2 O+K 2 O) / Al 2 O 3 value of 0.7 to 3 in terms of mole fraction, and is substantially free of As 2 O 3 and F.

Description

[0001] This application is a divisional application of the international application with the application number 200780037992.3 (PCT / JP2007 / 069727) and the invention title "Toughened Glass Substrate" submitted by the applicant on April 10, 2009. technical field [0002] The present invention relates to a tempered glass substrate, and particularly relates to a tempered glass substrate suitable for a mobile phone, a digital camera, a PDA (portable terminal), or a touch panel display. Background technique [0003] Devices such as mobile phones, digital cameras, PDAs, and touch panel displays tend to be popularized. [0004] High mechanical strength is required for glass substrates used in these applications. Conventionally, glass substrates strengthened by ion exchange or the like (so-called tempered glass substrates) have been used for these applications (see Patent Document 1 and Non-Patent Document 1). [0005] [Patent Document 1] Japanese Unexamined Patent Publication No. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/083C03C3/091C03B17/06G06F3/041
CPCG02F1/13338C03C21/002C03C3/085G02F2001/133302C03C3/083C03C3/093C03C3/097C03C3/091G02F1/133302C03C21/00C03B17/00Y10T428/315Y10T428/31
Inventor 村田隆
Owner NIPPON ELECTRIC GLASS CO LTD
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