Marble-like glass ceramic

Details Marble-like glass ceramic Marble-like glass ceramic

1993-05-10

1995-04-04

Turner, A. A.

Stock material or miscellaneous articles

Composite

Of quartz or glass

501 17, 501 18, 501 70, 501 71, 501 72, 501 65, 428 15, 65 331, C03C 1000

Patent

active

054036640

ABSTRACT:
Marble-like glass ceramic which consists essentially of, by weight percent, 50-75% SiO.sub.2, 1-15% Al.sub.2 O.sub.3, 6-16.5% CaO, 0.1-5% Li.sub.2 O, 0-1.5% B.sub.2 O.sub.3, 10-17.5% CaO+Li.sub.2 O+B.sub.2 O.sub.3, 2.5-12% ZnO, 0-12% BaO, 0.1-15% Na.sub.2 O+K.sub.2 O, and 0-10% coloring agents, said ceramic comprising .beta.-wollastonite precipitated as a major crystal. The coloring agents comprises at least one selected from a group of Fe.sub.2 O.sub.3, NiO, CoO, MnO.sub.2, Cr.sub.2 O.sub.3, and CuO. The marble-like glass ceramic may further comprises at least one of As.sub.2 O.sub.3 and Sb.sub.2 O.sub.3 of up to 1% as refining agents, at least one of up to 1.5% MgO and up to 1.5% SrO so as to improve meltability of the glass, and at least one of up to 1% TiO.sub.2, up to 1% ZrO.sub.2, and up to 1% P.sub.2 O.sub.5 so as to make the glass stable and less devitrifiable.

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patent: 4173484 (1979-11-01), Kubovits et al.
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patent: 5066524 (1991-11-01), Baba et al.
patent: 5089345 (1992-02-01), Hashibe et al.
patent: 5210057 (1993-05-01), Hann et al.
patent: 5275978 (1994-01-01), Shibuya et al.

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