Antimicrobial glass articles and methods of making and using same
AssigneeCorning Incorporated
InventorsYuhui Jin, Charlotte Diane Milia, Christine Coulter Wolcott
Life of this patent
Estimating the term…
Abstract
Described herein are various antimicrobial glass articles that have improved resistance to discoloration when exposed to harsh conditions. The improved antimicrobial glass articles described herein generally include a glass substrate that has a low concentration of nonbridging oxygen atoms, a compressive stress layer and an antimicrobial silver-containing region that each extend inward from a surface of the glass substrate to a specific depth, such that the glass article experiences little-to-no discoloration when exposed to harsh conditions. Methods of making and using the glass articles are also described.
Claims20
An antimicrobial glass article, comprising:
- a glass substrate comprising a compressive stress layer that extends inward from a surface of the glass substrate to a first depth therein, and an antimicrobial silver-containing region that extends inward from the surface of the glass substrate to a second depth therein, wherein the glass article exhibits an average haze of about 0.1% or less.
A method of making an antimicrobial glass article, the method comprising:
- providing a glass substrate;
- forming a compressive stress layer that extends inward from a surface of the glass substrate to a first depth;
- forming an antimicrobial silver-containing region that extends inward from the surface of the glass substrate to a second depth;
- and
- chemically cleaning the glass substrate after the forming steps by contacting the glass substrate with a cleaning solution at an ambient temperature for less than or equal to about 15 minutes, wherein the cleaning solution comprises any one of:
- less than or equal to about 2 volume percent each of ammonium hydroxide and hydrogen peroxide in water, based on a total volume of the cleaning solution;
- about 0.01 wt % to about 5 wt % sodium chloride in water, and
- about 0.01 wt % to about 5 wt % citric acid in water.
A method of making an antimicrobial glass article, the method comprising:
- providing a glass substrate;
- forming a compressive stress layer that extends inward from a surface of the glass substrate to a first depth;
- forming an antimicrobial silver-containing region that extends inward from the surface of the glass substrate to a second depth;
- and
- chemically cleaning the glass substrate after the forming steps by contacting the glass substrate with a chemical cleaning solution to form an antimicrobial glass article exhibiting an average haze of about 0.1% or less.
Dependencies are inferred from the claim text.