Zinc sulfophosphate glasses

Details Zinc sulfophosphate glasses Zinc sulfophosphate glasses

1993-10-18

1994-07-12

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 44, 501 46, C03C 316

Patent

active

053288742

ABSTRACT:
This invention relates to the preparation of a glass exhibiting a transition temperature normally below about 300.degree., a working temperature below about 400.degree., while, at the same time, exhibiting excellent resistance to attack by water. Specifically, the present invention discloses a glass consisting essentially in terms of mole percent on the oxide basis, of 15-35% P.sub.2 O.sub.5, 1-25% SO.sub.3, 30-55% ZnO, 0-25% R.sub.2 O, wherein R.sub.2 O is selected from the group consisting of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, and up to a total of 15% of optional ingredients in the indicated proportions selected from the group consisting of 0-10% Al.sub.2 O.sub.3, 0-10% MgO, 0-10% CaO, 0-10% SrO, 0-10% BaO, 0-10% MnO, 0-10% transition metal oxides and 0-15% Cl+F, as analyzed in weight percent.

REFERENCES:
patent: 4544695 (1985-10-01), Myers
patent: 4940677 (1990-07-01), Beall et al.
patent: 5043369 (1991-08-01), Bahn et al.
patent: 5071795 (1991-12-01), Beall et al.
patent: 5218035 (1993-06-01), Liu

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