High strength antimicrobial glass

An anti-microbial, glass technology, used in the manufacture of anti-microbial glass, chemically strengthened glass, and anti-destructive fields

Inactive Publication Date: 2017-02-22
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] As described herein, the problem of how to exchange silver ions into the glass surface without any appreciable loss of compressive stress is addressed by providing a method for fabricating glass with antimicrobial properties and high compressive stress

Method used

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  • High strength antimicrobial glass
  • High strength antimicrobial glass
  • High strength antimicrobial glass

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Embodiment Construction

[0012] In the following description, the same reference numerals denote similar or corresponding parts in the several views shown in the drawings. It should also be understood that terms such as "top", "bottom", "outwardly", "inwardly", etc. are words of convenience and do not constitute limitations of the terms unless otherwise indicated. Furthermore, whenever a group is described as comprising at least one of a set of elements and combinations thereof, it will be understood that the set may contain any number of those listed elements, either singly or in combination with each other, or Consists mainly of them, or consists of them. Similarly, whenever a group is described as consisting of at least one of a group of elements or a combination of them, it is to be understood that the group may consist of any number of those listed elements, either singly or in combination. composition. Unless otherwise indicated, the recited numerical ranges include both the upper and lower li...

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Abstract

A method of making a glass having antimicrobial properties and high compressive stress. The method includes a first ion exchange step in which potassium cations are exchanged for sodium cations in the base glass to provide a surface layer under compressive stress, followed by a second ion exchange in which silver cations are exchanged for potassium and lithium ions in the glass to produce the antimicrobial glass. In some embodiments, the antimicrobial glass has a maximum compressive stress that is at least 80% of the maximum compressive stress obtained by the potassium-for-sodium exchange in the first bath. A base glass and an ion exchanged glass antimicrobial having antimicrobial properties are also provided.

Description

[0001] This application claims priority under 35 U.S.C. §119 to U.S. Provisional Application Serial No. 61 / 944656, filed February 26, 2014, which application is based upon and is hereby incorporated by reference in its entirety. [0002] technical background [0003] This article relates to glasses with antimicrobial properties. Even more specifically, this document relates to vandal resistant, chemically strengthened glass having such antimicrobial properties. [0004] In general, high-strength glasses with antimicrobial surfaces are obtained by incorporating silver, via molten salt (or aqueous) solutions, which exchange silver ions into the glass, into the surface region of the glass. However, the exchange of silver with potassium cations inevitably leads to a large drop in compressive stress at the glass surface, causing a significant loss of strength in the final glass product. This is due to the much smaller ionic radius of silver (129 picometers (pm)) than potassium (152...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/097C03C4/00C03C21/00C03C3/093C03C3/091
CPCC03C3/091C03C3/093C03C3/097C03C4/00C03C21/002C03C21/005C03C2204/02C03C2204/00Y10T428/315
Inventor J·C·莫罗
Owner CORNING INC
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