Browse Prior Art Database

Reduction of Salt Blooming on Glass Surfaces by Hydrothermal Diffusion

IP.com Disclosure Number: IPCOM000118173D
Original Publication Date: 1996-Oct-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Hagan, JA: AUTHOR [+4]

Abstract

Disclosed is a method for reducing salt crystal formation on glass surfaces by treating it in hot water (hydrothermal diffusion).

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Reduction of Salt Blooming on Glass Surfaces by Hydrothermal Diffusion

      Disclosed is a method for reducing salt crystal formation on
glass surfaces by treating it in hot water (hydrothermal diffusion).

      Glass that contains alkali ions can form crystals on the
surface if it is exposed to high enough humidity and temperature
conditions over time.  In experimenting with the removal of surface
leachable salts from glass, it was found that placing it in hot water
for a period of time decreased the formation of additional salt
crystals.  Glass that was placed in 100 degree centigrade De-Ionized
(DI) water for one hour had a large reduction in surface alkali
concentration such that the surface salts generated by accelerated
temperature and humidity testing (80 degrees Centigrade and 80%
relative humidity for one week) were significantly reduced.

      Analysis of this treated glass showed that the hydrothermal
diffusion process had removed alkali ions near the surface with an
exponential decay of removal going into the glass.