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Previous solid state analyses of sintering in Ti4+ -doped-commercial alumina are shown to be in error because a liquid phase exists in the appropriate region of the Al2 O3 −TiO3 −Na2 Ophase diagram at least by 1350° C, a temperature lower than that at which "solid state" studies were conducted. It is suggested that liquid-phase sintering is a much more common occurrence than was realized formerly. 相似文献
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A liquid phase in the Al2 O3 -1 mol% TiO2 -0.5 mol% NaO1/2 composition is confirmed at ±1300°C by an electrical conductivity measurement. The ease of the method led to a study of the Al2 O3 -2 mol% CuO-2 mol% TiO2 system and to the geologically important detection of eutectics (peritectics) in rock materials. 相似文献
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