INCORPORATION OF ALKALINE EARTH IONS INTO ALKALI-CONTAINING GLASS SURFACES TO INHIBIT ALKALI EGRESS
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United States of America Patent
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Issued Date -
May 30, 2013
app pub date -
Nov 6, 2012
filing date -
Nov 30, 2011
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Abandoned
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Abstract
Leaching alkali ions from a glass substrate to form a glass substrate having an intrinsic alkali barrier layer includes providing a glass substrate comprising alkali metal ions and having at least two opposing surfaces and a thickness between the surfaces, and contacting at least one of the surfaces of the substrate with a solution comprising alkaline earth salts in either water or as a melted salt bath such that at least a portion of the alkali metal ions are replaced by alkaline earth metal ions in the at least one surface and into the thickness to form the glass substrate having an intrinsic alkali barrier layer.
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