Chemical strengthening method

Details Chemical strengthening method Chemical strengthening method

1983-08-15

1984-11-20

Schor, Kenneth M.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 29, C03C 2100

Patent

active

044837003

ABSTRACT:
A method of chemically strengthening a sodium silicate glass is disclosed wherein ions from the glass are exchanged for larger ions, e.g. Na.sup.+ for K.sup.+, at a temperature above the glass strain point, subsequently the same exchange is carried out below the glass strain point, and the glass article is maintained throughout the process in a single, temperature-programmed bath containing the large exchangeable ions.

REFERENCES:
patent: 3393987 (1968-07-01), Plumat
patent: 3751238 (1973-08-01), Grego et al.
patent: 4231776 (1980-11-01), Trojer

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