| 氧化锌纳米晶高压下的晶粒演化和性能 |
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| 引用本文： | 邵光杰,秦秀娟,刘日平,王文魁,姚玉书. 氧化锌纳米晶高压下的晶粒演化和性能[J]. 物理学报, 2006, 55(1): 472-476 |
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| 作者姓名： | 邵光杰 秦秀娟 刘日平 王文魁 姚玉书 |
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| 作者单位： | (1)`中国科学院物理研究所，北京 100080; (2)燕山大学亚稳材料科学与技术重点实验室，秦皇岛 066004; (3)燕山大学亚稳材料科学与技术重点实验室，秦皇岛 066004;中国科学院物理研究所，北京 100080 |
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| 摘 要： | 用GS-1B型六面顶压机研究了ZnO纳米晶高压下的晶粒演化和性能，用X射线衍射仪和场发射扫描电子显微镜对高压样品的晶粒尺寸、微观形貌进行了表征.结果表明，高压下ZnO纳米晶存在压致晶粒碎化效应.硬度和伏安特性实验表明，高压调制后样品的显微硬度约是常压烧结样品硬度的2.3倍，非线性伏安特性明显优于常压烧结样品.关键词：氧化锌纳米晶高压压致碎化非线性伏安特性
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| 关 键 词： | 氧化锌纳米晶 高压 压致碎化 非线性伏安特性 |
| 文章编号： | 1000-3290/2006/55(01)/0472-05 |
| 收稿时间： | 2005-03-01 |
| 修稿时间： | 2005-03-012005-03-31 |
Grain fragmentation and property modification of nanocrystalline ZnO under high pressure |
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| Shao Guang-Jie,Qin Xiu-Juan,Liu Ri-Ping,Wang Wen-Kui,Yao Yu-Shu. Grain fragmentation and property modification of nanocrystalline ZnO under high pressure[J]. Acta Physica Sinica, 2006, 55(1): 472-476 |
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| Authors: | Shao Guang-Jie Qin Xiu-Juan Liu Ri-Ping Wang Wen-Kui Yao Yu-Shu |
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| Abstract: | Grain fragmentation and property modification of nanocrystalline ZnO under high pressure were studied on CS-1B 6×8000 kN cubic high pressure apparatus. Grain size and microstructure of the samples have been characterized by X-ray diffraction and field emission scanning electron microscopy. The results show that the significant grain fragmentation phenomenon occurs inside the crystallites. Experimental results on hardness and the current-voltage characteristics indicate that micro-hardness of the samples after high pressure is 2.3 times that of the samples sintered at atmospheric pressure and the nonlinear current-voltage characteristics is obviously better than that of the latter. |
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| Keywords: | ZnO nanocrystals high pressure pressureinduced grain fragmentation nonlinear current-voltage characteristics |
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