The microstructure and properties of porous alumina/ zirconia composites fabricated by a TBA-based freeze casting route
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Well developed plate-like α-Al2O3 particles were obtained in NaCl-KCl by sintering at 1000 ο C for 4 h, using Al(OH)3 powder as the starting material. The influence of silica on the phase transition and morphology development were examined. When silica was added, the main phase was γ-Al2O3 in the sample by sintering at 1000 ο C, and mutinaite, SiO2 and γ-Al2O3 phases were observed in the sample by sintering at 1200 ο C. Some abnormal particles were observed in the sample with Si added by sintering at 1000, 1100 and 1200 ο C.
Abstract
Well developed plate-like α-Al2O3 particles were obtained in NaCl-KCl by sintering at 1000 ο C for 4 h, using Al(OH)3 powder as the starting material. The influence of silica on the phase transition and morphology development were examined. When silica was added, the main phase was γ-Al2O3 in the sample by sintering at 1000 ο C, and mutinaite, SiO2 and γ-Al2O3 phases were observed in the sample by sintering at 1200 ο C. Some abnormal particles were observed in the sample with Si added by sintering at 1000, 1100 and 1200 ο C.
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