期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 90, 期 1, 页码 330-332出版社
WILEY
DOI: 10.1111/j.1551-2916.2006.01408.x
关键词
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This work verifies the applicability of two-stage sintering as a means of suppressing the final stage grain growth of submicrometer alumina. The first heating step should be short at a relatively high-temperature (1400 degrees-1450 degrees C) in order to close porosity without significant grain growth. The second step at temperatures around 1150 degrees C facilitates further densification with limited grain growth. Fine-grained alumina with a relative density of 98.8% and a grain size of 0.9 mu m was prepared by two-stage sintering. A standard sintering process resulted in ceramics with identical relative density and a grain size of 1.6 mu m.
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