Effect of γ-Al2O3 additives on the microstructure of Y2O3 ceramics
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This paper reported the fabrication of Y2O3 transparent ceramics with γ-Al2O3 doped as the sintering aid under vacuum using the co-precipitated Y2O3 powders as raw materials. The different concentrations of γ-Al2O3 were employed for investigating the effect on the microstructures and densities of Y2O3 ceramics. The doped sintering aid could achieve fine microstructure and high density. The average grain sizes were around 25 μm, and the relative densities were all above 98.5 %. The best sample was achieved with 0.08 wt% γ-Al2O3 when sintered at 1850 °C for 8 h. And the grain size and relative density were 25 μm and 99.47 %, respectively.
KeywordsRelative Density Y2O3 Volume Shrinkage Shrinkage Rate Ammonia Water
The authors acknowledge the generous financial support from Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and National Natural Science Foundation of China (51402133, 51302115, and 51202111).
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