Phase separated, non-crystalline opal glasses

Details Phase separated, non-crystalline opal glasses Phase separated, non-crystalline opal glasses

1981-01-26

1982-01-05

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 59, C03C 304, C03C 308

Patent

active

043092195

ABSTRACT:
This invention is directed to the production of spontaneous essentially non-crystalline opal glasses exhibiting a very dense, milky-white appearance and excellent resistance to weathering and attack by alkaline detergents consisting essentially, expressed in weight percent on the oxide basis, of 2-5% K.sub.2 O, 4-10% Na.sub.2 O, 4.5-12% RO, wherein RO consists of 0-3% MgO, 0-6% CaO, 0-8% SrO, and 0-11% BaO, 4-9% B.sub.2 O.sub.3, 6-15% Al.sub.2 O.sub.3, 0-5% TiO.sub.2, 51-66% SiO.sub.2, 1-6% P.sub.2 O.sub.5, and 1-5% F.

REFERENCES:
patent: 3661601 (1972-05-01), Dumbaugh et al.
patent: 3673049 (1972-06-01), Giffen et al.
patent: 4249946 (1981-02-01), Danielson

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