| 用悬浮液干燥法制备CeO2包覆的ZrO2粉体 |
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| 引用本文： | 袁正希.用悬浮液干燥法制备CeO2包覆的ZrO2粉体[J].电子科技大学学报（自然科学版）,2000,29(6):613-616. |
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| 作者姓名： | 袁正希 |
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| 作者单位： | 1.电子科技大学信息材料工程学院 成都 610054 |
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| 基金项目： | 国家留学基金委留学基金，欧盟资助项目，，BRPR-CT97-0432，， |
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| 摘 要： | 讨论了用一种新的表面改性技术制备Al2O3掺杂、CeO2包覆ZrO2纳米粉体的方法。在水-乙醇溶剂中,干燥硝酸铈和单斜相二氧化锆粉体的悬浮液经800℃热分解,可以制备出粒度小于100 nm的Al2O3掺杂、CeO2包覆的单斜相ZrO2粉体。该粉体可以在空气中和1 450℃下无压烧结成致密化Ce-TZP材料,具有KIC=11 MPa m1/2的良好断裂韧性和HV30=750 kg/mm2的硬度。
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| 关 键 词： | 制备 二氧化铈包覆二氧化锆粉体 铈稳定化四方相多晶体 机械性能 |
| 收稿时间： | 2000-04-03 |
Preparation of CeO2-coated ZrO2 Powder by Suspension Drying |
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| Yuan Zhengxi.Preparation of CeO2-coated ZrO2 Powder by Suspension Drying[J].Journal of University of Electronic Science and Technology of China,2000,29(6):613-616. |
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| Authors: | Yuan Zhengxi |
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| Affiliation: | 1.Institute of Information Materials Engineering,UEST of China Chengdu 610054 |
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| Abstract: | A novel technique is described for the preparation of Al2O3-doped CeO2-coated ZrO2 nanopowders from a solution of aluminium nitrate and cerium nitrate in a mixed alcohol/water suspension with monoclinic zirconia powder. Drying of the suspension and subsequent calcination of the powder at 800℃ results in Al2O3-doped CeO2-coated monoclinic ZrO2 nanopowder with a grain size below 100 nm. That fabricated powder can be pressureless sintered in air at 1 450℃ into dense Ce-TZP materials with an excellent fracture toughness of 11 MPa m1/2 and a Vickers hardness of 750 kg/mm2 (HV30). The microstructure and mechanical properties of the Al2O3-doped CeO2-coated powder based TZP are compared with those of a Ce-TZP obtained from commercially available co-precipitated powder. |
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