Glass, chemically tempered glass, and method for producing same

A technology of strengthening glass and manufacturing method, applied in the field of glass, can solve the problem of low CT limit of glass, and achieve the effects of high strength, large fracture toughness value, and not easy to devitrify

Pending Publication Date: 2022-01-07
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The CT limit of ordinary glass is not too high, so there is a limit to increasing the strength by chemical strengthening

Method used

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  • Glass, chemically tempered glass, and method for producing same
  • Glass, chemically tempered glass, and method for producing same
  • Glass, chemically tempered glass, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0149] Hereinafter, the present invention will be described using examples, but the present invention is not limited thereto. G7 to G15 are examples of the glass of the present invention, and G1 to G6 are comparative examples. S4 to S6 are examples of the present chemically strengthened glass, and S1 to S3 are comparative examples. In addition, about each measurement result in a table|surface, the blank column shows that it was not measured.

[0150] (making of glass)

[0151] Glass raw materials were prepared so as to have the glass compositions described in Tables 3 to 4 in terms of mole percentages based on oxides, and were melted and polished to produce glass plates. G1 is the glass A mentioned above. Also, X in the table means Y 2 o 3 , La 2 o 3 , Nb 2 o 5 、 Ta 2 o 5 and WO 3 The total content of .

[0152] As the glass raw material, general glass raw materials such as oxides, hydroxides, and carbonates are appropriately selected so as to be weighed so as to ...

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Abstract

The present invention provides a glass that has a high fracture toughness value and is easy to produce. Also, the purpose of the present invention is to provide a glass that stably has a higher strength than a conventional glass. The present invention pertains to a glass containing: 40-65% of SiO2; 25-40% of Al2O3; and 7-15% in total of at least one selected from among Y2O3, La2O3, Nb2O5, Ta2O5, WO3.

Description

technical field [0001] The present invention relates to glass, and more specifically, to high-strength glass, chemically strengthened glass, and a method for producing the same. Background technique [0002] The fracture toughness value is one of the important indexes for evaluating the strength of glass, but it is not easy to increase the fracture toughness value of glass. For example, Patent Document 1 discloses a glass having a very high fracture toughness value. However, the glass contains Al 2 o 3 -SiO 2 These two components and Al 2 o 3 Glass with a large content is difficult to be vitrified because crystals are precipitated at the interface with a container for melting in a normal glass manufacturing method. [0003] A chemical strengthening method is known as a method for increasing the strength of ordinary glass. For example, Patent Document 2 discloses a method for obtaining a chemically strengthened glass having a high surface strength and a deep compressiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/095C03C3/097C03C3/083C03C21/00
CPCC03C3/095C03C3/097C03C3/083C03C21/002C03C3/091
Inventor 马田拓实今北健二荒井雄介浦田新吾
Owner ASAHI GLASS CO LTD
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