HEAT TREATING SILICA-TITANIA GLASS TO INDUCE A Tzc GRADIENT
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United States of America Patent
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Issued Date -
Aug 27, 2015
app pub date -
Feb 18, 2015
filing date -
Feb 26, 2014
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Abstract
A method for forming a Tzc gradient in a silica-titania glass article is provided. The method includes contacting a first surface of the glass article with a surface of a first heating module of a heating apparatus and contacting a second surface of the glass article with a surface of a second heating module of the heating apparatus. The method further includes raising the temperature of the first heating module to a first temperature, raising the temperature of the second heating module to a second temperature, and maintaining the first heating module at the first temperature and the second heating module at the second temperature for a predetermined period of time to form a thermal gradient through the glass article, the first temperature being greater than the second temperature. The method also includes cooling the glass article to form a Tzc gradient through the thickness of the glass article.
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