Rapidly crystallized beta-spodumene glass-ceramic materials

Details Rapidly crystallized beta-spodumene glass-ceramic materials Rapidly crystallized beta-spodumene glass-ceramic materials

1979-01-17

1980-07-15

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Marking

65 33, 106 398, 106 52, 106 53, 106 54, C03C 322

Patent

active

042126789

ABSTRACT:
Glasses in the Li.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 -MgO-ZnO-TiO.sub.2 composition field, additionally containing PbO and/or one of B.sub.2 O.sub.3, Na.sub.2 O and P.sub.2 O.sub.5 are rapidly crystallized to beta-spodumene glass-ceramics at temperatures not exceeding 1000.degree. C. to provide white, opaque glass-ceramic products exhibiting both low thermal expansion and good chemical durability.

REFERENCES:
patent: 3013362 (1961-12-01), Calkins et al.
patent: 3582371 (1971-06-01), Bruno et al.
patent: 3985533 (1976-10-01), Grossman
patent: 4042362 (1977-08-01), MacDowell et al.
patent: 4057434 (1977-11-01), Rittler

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