| 摘要 |
Marble-like glass ceramic which consists essentially of, by weight percent, 50-75% SiO2, 1-15% Al2O3, 6-16.5% CaO, 0.1-5% Li2O, 0-1.5% B2O3, 10-17.5% CaO+Li2O+B2O3, 2.5-12% ZnO, 0-12% BaO, 0.1-15% Na2O+K2O, 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 Fe2O3, NiO, CoO, MnO2, Cr2O3, and CuO. The marble-like glass ceramic may further comprises at least one of As2O3 and Sb2O3 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% TiO2, up to 1% ZrO2, and up to 1% P2O5 so as to make the glass stable and less devitrifiable.
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