| 摘要 |
This invention is directed to the production of self-glazing gas-ceramic articles consisting essentially of very fine-grained cubic BPO4 crystals and very small gas-containing bubbles uniformly distributed with a SiO2-rich residual glassy matrix, the gas within the bubbles consisting predominantly of hydrogen. The inventive articles prepared in three basic steps: (1) melting a batch for a glass consisting essentially, expressed in terms of weight percent on the oxide basis, of 30-60% SiO2, 10-40% B2O3, 15-45% P2O5, and up to 20% total of at least one compound in the indicated proportion selected from the group consisting of 5-15% BN, 5-10% Si, 5-10% SiC, and 10-20% Si3N4; (2) cooling the melt and shaping a glass body therefrom; and (3) heating the glass body between about 900 DEG -1050 DEG C.
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