Preparation and characterization of nanoscale Y-TZP powder by heterogeneous azeotropic distillation |
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Authors: | Haibo Qiu Lian Gao Chude Feng Jingkun Guo Dongsheng Yan |
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Affiliation: | (1) State Key Laboratory on High Performance Ceramics and Superfine Microstructure Studies, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, 200050 Shanghai, People's Republic of China |
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Abstract: | A heterogeneous azeotropic distillation process was effectively used to dehydrate hydrous zirconia and therefore prevent the formation of hard agglomerates in the preparation of nanoscale zirconia powder. The mechanism of azeotropic distillation to prevent hard agglomerate from forming was studied by investigating the interaction of hydrous zirconia with n-butanol. The prepared powder was sintered to 99.5% of theoretical density by slow-sintering (average grain size of 200 nm), 97.5% by fast-sintering (average grain size of 120 nm) at 1250°C. |
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