| 摘要 |
A high-silica ceramic glaze, having a low coefficient of thermal expansion, suitable for application to alumina bodies, is disclosed. The glaze consists essentially, by weight percent, of 35 to 54 percent SiO2, from 7 to 11 percent Al2O3, from 17 to 25 percent B2O3, from 2 to 3 percent CaO, from 2 to 21/2 percent ZnO, from 41/4 to 5 percent Na2O, from 81/2 to 21 percent SrO, and from 0.7 to 1 percent of a mixture of K2O, Li2O and MgO, and minor impurities. |
