| α-Al2O3纳米粉体的烧结行为 |
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| 引用本文： | 刘浩,徐忠锋.α-Al2O3纳米粉体的烧结行为[J].东北师大学报(自然科学版),2012,44(2):60-64. |
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| 作者姓名： | 刘浩 徐忠锋 |
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| 作者单位： | 1. 兰州商学院物理实验室,甘肃兰州,730020
2. 中科院近代物理研究所,甘肃兰州730000;西安交通大学应用物理系,陕西西安710049 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 为了探讨在无压烧结过程中α-Al2O3纳米粉体的烧结行为和致密化过程,采用高分子网络凝胶法制备了α-Al2O3纳米粉体,经冷压成型后无压烧结了Al2O3陶瓷,结果表明:α-Al2O3晶种的加入明显降低了高分子网络凝胶法制备α-Al2O3粉体的相转变温度,在950℃较低温下就可获得α-Al2O3纳米粉体；生坯的相对密度随...
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| 关 键 词： | α-Al2O3纳米粉体 烧结 致密化 |
Sintering behavior of α-Al2O3 nanopowders |
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| LIU Hao
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XU Zhong-feng.Sintering behavior of α-Al2O3 nanopowders[J].Journal of Northeast Normal University (Natural Science Edition),2012,44(2):60-64. |
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| Authors: | LIU Hao XU Zhong-feng |
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| Institution: | 2,3(1.Physics Laboratory,Lanzhou University of Finance and Economics,Lanzhou 730020,China;2.Institute of Modern Physics,Chinese Academy of Science,Lanzhou 730000,China;3.Department of Applied Physics,Xi’an Jiaotong University,Xi’an 710049,China) |
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| Abstract: | In order to inquire into the sintering behavior and the processes of densification of the α-Al2O3 nanopowders,the α-Al2O3 nanopowders synthesized by the polyacrylamide gel method were used to sinter bulk Al2O3 ceramics.The presence of the α-Al2O3 seeds can evidently decrease the phase formation temperature of the α-Al2O3 synthesized by the polyacrylamide gel method and obtain the α-Al2O3 nanopowders at a lower temperature of 950℃.The relative density of the Al2O3 green body increases with increasing compaction pressure on the green compacts and the Al2O3 green compacts with relative density of 56.0% are obtained at compaction pressure of 1 420 MPa.The relative density of the sintered Al2O3 ceramics increases with increasing the starting relative density of the green compacts and sintering temperature and the Al2O3 ceramics with a grain size of 1~2 μm and a relative density of 95.7% were obtained by sintering the green compacts with relative density of 52.8% at 1 500℃. |
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| Keywords: | α-Al2O3 nanopowders sintering densification |
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