Opal glasses having an apatite opacifying phase

Details Opal glasses having an apatite opacifying phase Opal glasses having an apatite opacifying phase

1984-03-23

1985-08-20

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 59, 501 61, C03C 308, C03C 310, C03C 330

Patent

active

045364818

ABSTRACT:
This invention is directed to spontaneous opal glasses containing an apatite opacifying phase and exhibiting a softening point of at least 740.degree. C., excellent chemical durability, and a temperature interval between the high temperature crystallization liquidus and the emulsion liquidus greater than 50.degree. C. The glasses consist essentially, in weight percent on the oxide basis, of

REFERENCES:
patent: 2394502 (1946-02-01), Weyl et al.
patent: 4298390 (1981-11-01), Flannery et al.

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