Lithium containing ion exchange strengthened glass

Details Lithium containing ion exchange strengthened glass Lithium containing ion exchange strengthened glass

1978-04-19

1979-05-29

Vertiz, O. R.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

Surface modified glass

106 52, 65 30E, 428428, C03C 304, C03C 2100

Patent

active

041567552

ABSTRACT:
Glasses having 59-62% by weight SiO.sub.2, 10-12% Na.sub.2 O, 4-5.5% Li.sub.2 O, 15-23% Al.sub.2 O.sub.3, and 2-5% ZrO.sub.2 have been found to be excellent for ion exchange strengthening below the strain point by exchanging the lithium ions with larger alkali metal ions such as sodium. Such glasses possess low melting temperatures, wide working ranges, and good chemical durability. The glasses are also free from corrosive volatile components, and sheets of such glasses resist devitrification when subjected to subsequent bending processes.

REFERENCES:
patent: 3218220 (1965-11-01), Weber
patent: 3357876 (1967-12-01), Rinehart
patent: 3433611 (1969-03-01), Saunders et al.
patent: 3485702 (1969-12-01), Mochel
patent: 3529946 (1970-09-01), Fischer et al.
patent: 3533888 (1970-10-01), Eppler et al.
patent: 3615320 (1971-10-01), Junge
patent: 3752729 (1973-08-01), Mochel
patent: 3790430 (1974-02-01), Mochel
patent: 3985535 (1976-10-01), Bennett et al.
patent: 4015045 (1977-03-01), Rinehart

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