Highly refractory glass-ceramics suitable for incorporating radi

Details Highly refractory glass-ceramics suitable for incorporating radi Highly refractory glass-ceramics suitable for incorporating radi

1980-06-30

1982-02-09

McCarthy, Helen M.

Compositions

Radioactive compositions

65 33, 501 5, 501 6, 501 10, 501 63, 501 64, 501 73, C03C 304, C03C 322, H01B 108

Patent

active

043149090

ABSTRACT:
This invention is concerned with the production of glass-ceramics especially suitable for incorporating radioactive wastes. The inventive glass-ceramics contain at least two crystal phases selected from the group of pollucite, mullite, monazite, and, optionally, tetragonal or cubic zirconia as the predominant crystal phases and consist essentially, expressed in weight percent on the oxide basis, of 5-40% Cs.sub.2 O, 15-50% Al.sub.2 O.sub.3, 0-30% La.sub.2 O.sub.3 +CeO.sub.2, 0-20% P.sub.2 O.sub.5, 0-30% ZrO.sub.2, 12-65% La.sub.2 O.sub.3 +CeO.sub.2 +P.sub.2 O.sub.5, and 15-50% SiO.sub.2.

REFERENCES:
patent: 3161601 (1964-12-01), Barton
patent: 3236662 (1966-02-01), MacDowell
patent: 3723140 (1973-03-01), Beall et al.
patent: 3726695 (1973-04-01), Beall et al.
McCarthy, Gregory J., "Crystalline and Coated High-Level Forms", NUREG/CP-0005, pp. 623-650 of PROCEEDINGS of the Conference on High-Level Radioactive Solid Waste Forms Dec. 19-21, 1978, Denver, Colo. pub. Apr. 1979.

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