| 摘要 |
This invention is drawn to thermally devitrifiable sealing glasses capable of forming sound seals with glasses, glass-ceramics, and ceramics having coefficients of thermal expansion (0 DEG -300 DEG C.) between about 0.5-5x10-7/ DEG C. In finely fritted form, the glasses can be sintered and crystallized in situ at about 900 DEG -1000 DEG C. The glasses consist essentially, expressed in weight percent on the oxide basis, of about 1-2% Li2O, 0.7-1.5% MgO, 9-13% ZnO, 19-23% Al2O3, 62-68% SiO2, and at least 1% K2O+Rb2O+Cs2O in the indicated proportions of 0-3% K2O, 0-4% Rb2O, and 0-6% Cs2O.
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