Method of glass strengthening by ion exchange

Details Method of glass strengthening by ion exchange Method of glass strengthening by ion exchange

1978-08-04

1980-08-19

Fisher, Richard V.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

C03C 1722, C03C 2100

Patent

active

042182301

ABSTRACT:
A method for strengthening a sodium lime silicate type glass body by substituting potassium ions for sodium ions in a surface layer of glass by spraying an aqueous solution of potassium ions and from 1 to 6 weight percent of sodium ions upon the glass at a temperature of from about 200.degree. C. to just below the annealing point of the glass.

REFERENCES:
patent: 3218220 (1965-11-01), Weber
patent: 3287201 (1966-11-01), Chisholm et al.
patent: 3473906 (1969-10-01), Graham
patent: 3607172 (1971-09-01), Poole et al.
patent: 3743491 (1973-07-01), Poole et al.
patent: 3791809 (1974-02-01), Lau
patent: 3798013 (1974-03-01), Inoue et al.
patent: 3844754 (1974-10-01), Grubb et al.
patent: 4017289 (1977-04-01), Hoda
patent: 4055703 (1977-10-01), Rinehart
patent: 4133665 (1979-01-01), Bartholomew et al.
Rothermel, "Effect of Stress on Durability of Ion-Exchanged Surfaces", Journal of American Ceramic Society, vol. 50, pp. 574-577, 1967.

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