| 摘要 |
The present invention is directed to the preparation of glass-ceramic articles exhibiting an apparent annealing point of at least 1200 DEG C. and containing slawsonite crystallization consisting essentially, in weight percent, of 10-54% SrO, 10-40% Al2O3, 36-55% SiO2, and up to 25% total of at least one alkaline earth metal oxide in the indicated proportion of 0-10% MgO, 0-15% CaO, and 0-20% BaO.
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