METHOD OF STRENGTHENING GLASS AND SUCH GLASSES

Abstract: a method of manufacturing a strengthened glass article comprises soaking a glass article in a bath comprising molten salt. the molten salt comprises alkali metal ions. during the soaking, the alkali metal ions of the salt are exchanged for smaller alkali metal ions of glass of the glass article and impart a compressive stress in the glass article in an ion-exchanged portion thereof at or near a surface thereof. the glass of the glass article has a strain point temperature of at least 625� c., corresponding to glass viscosity of 10poise. the temperature of the bath is at least 70� c. below the strain point temperature of the glass of the glass article.

Inventor(s): Timothy Michael Gross, Alexandra Lai Ching Kao Andrews Mitchell, Jamie Vargeson, Wendell Porter Weeks, JR.

CPC Classification: C03C21/002 (Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface)

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