High strength glass made by ion exchange

Details High strength glass made by ion exchange High strength glass made by ion exchange

1974-04-30

1976-05-25

Bashore, S. Leon

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

65 30E, C03C 304, C03C 1500

Patent

active

039590003

ABSTRACT:
A SiO.sub.2 -Al.sub.2 O.sub.3 -Na.sub.2 O-Li.sub.2 O glass which can be strengthened in a short time, typically in less than about thirty minutes, by an alkali metal ion exchange method to produce a high strength glass having an improved compressive surface layer of relatively large thickness can be obtained by substituting Li.sub.2 O for a portion of Na.sub.2 O content in a glass consisting essentially of SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, Li.sub.2 O and F.sub.2.

REFERENCES:
patent: 2779136 (1957-01-01), Hood et al.
patent: 3357876 (1967-12-01), Rinehart
patent: 3529946 (1970-09-01), Fisher et al.
patent: 3573076 (1971-03-01), Rittler
patent: 3597179 (1971-08-01), Simmons
patent: 3615320 (1971-10-01), Juhge et al.
patent: 3656923 (1972-03-01), Garfinkel

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