| 摘要 |
PURPOSE:To provide a marble-like crystallized glass which can be produced in large quantities and a high yield because of excellent stability of the color tone. CONSTITUTION:This marble-like crystallized glass has a compsn. consisting of, by weight, 50-75% SiO2, 1-15% Al2O3, 10-17.5%, in total, of 6-16.5% CaO, 0.1-5% Li2O and 0-1.5% B2O3, 2.5-12% ZnO, 0-12% BaO, 0.1-15% Na2O+K2O and 0-10% colorant and contains beta-wollastonite deposited as principal crystals. |
