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Glasses Having Improved Toughness And Scratch Resistance

A silicate glass, brittle technology, used in transportation and packaging, thin material handling, etc., can solve the problems of poor scratch resistance and low brittleness, achieve high hardness and improve edge chip resistance.

Active Publication Date: 2016-07-20
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Softer (i.e. less hard) glass is less brittle but less scratch resistant

Method used

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  • Glasses Having Improved Toughness And Scratch Resistance
  • Glasses Having Improved Toughness And Scratch Resistance
  • Glasses Having Improved Toughness And Scratch Resistance

Examples

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Embodiment Construction

[0013] In the following description, the same reference numerals denote similar or corresponding parts in all figures indicated by numerals. It should also be understood that terms such as "top", "bottom", "outwardly", "inwardly", etc. are suitable words and are not to be regarded as terms of limitation unless otherwise indicated. Furthermore, whenever a group is described as comprising at least one of a group of elements and combinations thereof, it is understood that the group may comprise any number of the listed elements (either alone or in combination with each other). Similarly, whenever a group is described as consisting of at least one of a group of elements and combinations thereof, it is understood that the group may consist of any number of the listed elements (either alone or in combination with each other). Unless otherwise indicated, the recited numerical ranges include the upper and lower limits of that range.

[0014] see figure 1 , It can be understood that ...

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Abstract

A silicate glass that is tough and scratch resistant. The toughness is increased by minimizing the number of non-bridging oxygen atoms in the glass. In one embodiment, the silicate glass is an aluminoborosilicate glass in which -15 mol%= (R2O + R'O - Al2O3 - ZrO2) - B2O3 = 4 mol%, where R is one of Li, Na, K, Rb, and Cs, and R is one of Mg, Ca, Sr, and Ba.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Patent Application No. 61 / 004677, filed November 29, 2007. technical field [0003] This invention relates to silicate glasses. More specifically, the present invention relates to silicate glasses in which the content of non-bridging oxygen atoms in the glass is minimized. More particularly, the present invention relates to a silicate glass that is scratch resistant and less prone to edge chipping. Background technique [0004] Glass has the disadvantage of being brittle. Brittleness is generally understood as the ratio of the hardness of a glass to its fracture toughness. Brittleness can lead to fractures, defects and edge chipping, and is particularly problematic in applications such as cover plates for mobile electronics, touch screens, watch glasses, solar concentrators, windows, screens, containers, and more. Glass compositions with h...

Claims

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Application Information

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IPC IPC(8): C03C3/091C03C3/093C03C4/00
CPCC03C3/091C03C3/093C03C4/00Y10T428/26C03C21/00C03C4/18C03C2204/00
Inventor M·J·德内卡A·J·埃利森S·戈麦斯R·M·莫伦纳
Owner CORNING INC
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