Method for producing a strengthened glass structural member

Details Method for producing a strengthened glass structural member Method for producing a strengthened glass structural member

1980-02-25

1982-02-02

Fisher, Richard V.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3014, C03B 3200, C03C 1710, C03C 1725

Patent

active

043137482

ABSTRACT:
The present invention relates to a new glass material applicable in those situations where thermal and/or mechanical shock would limit the use of other glass materials presently available. Dopants are deposited into the interconnected pores of a porous glass in a non-uniform manner such that upon consolidation and cooling the final article has its surface under compressive stress. Dopants may also be added to control color and other appearance features. A porous silicate glass is washed with sodium hydroxide followed by immersing the washed glass in a liquid solution of a dopant in a liquid solvent therefor to stuff the pores of the washed glass with the solution. Thereafter, the solvent is removed from the pores and the pores are collapsed by a heating step.

REFERENCES:
patent: 2355746 (1944-08-01), Nordberg et al.
patent: 3758284 (1973-09-01), Haller
patent: 3792987 (1974-02-01), Eaton
patent: 3938974 (1976-02-01), Macedo et al.

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