High zirconia containing glass ceramic cement

Details High zirconia containing glass ceramic cement High zirconia containing glass ceramic cement

1974-07-09

1976-07-06

Garvin, Patrick P.

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 53, C03C 322, C03C 304, C03C 312

Patent

active

039679691

ABSTRACT:
A glass ceramic cement comprising by weight 20% to 45% ZrO.sub.2, 20% to 60% Al.sub.2 O.sub.3, 0% to 27% SiO.sub.2, 0% to 30% CaO, 0% to 10% Na.sub.2 O, the cement including at least one material selected from the group B.sub.2 O.sub.3 and PbO, in the amounts up to 35% and 25% respectively, sufficient to assist in taking ZrO.sub.2 into solution during the melting of said glass ceramic cement, B.sub.2 O.sub.3 in the absence of PbO being in an amount more than 5%, PbO in the absence of B.sub.2 O.sub.3 being in an amount more than 2%.

REFERENCES:
patent: 3826659 (1974-07-01), Busby et al.

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