| Ni掺杂ZnO制备及其热电性能研究 |
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| 引用本文： | 吴子华,谢华清,曾庆峰. Ni掺杂ZnO制备及其热电性能研究[J]. 无机材料学报, 2013, 28(9): 921-924. DOI: 10.3724/SP.J.1077.2013.12696 |
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| 作者姓名： | 吴子华 谢华清 曾庆峰 |
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| 作者单位： | (上海第二工业大学 城市建设与环境工程学院, 上海 201209) |
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| 基金项目： | 国家自然科学基金(51206103); 上海市教委科研创新项目(13YZ128); 上海东方学者岗位支持计划 |
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| 摘 要： | 采用溶胶-凝胶法合成了Zn1-xNixO纳米颗粒, 以放电等离子烧结成块体。扫描电镜照片发现, Zn1-xNixO颗粒呈300~500 nm厚的片状结构, 表面存在大量蜂窝状小孔。由XRD数据可以看出, x≥0.05的样品中存在ZnyNizO杂质相。热电性能分析表明, 随着Ni添加量的增加, 塞贝克系数的绝对值|S|逐渐减小, 而电导率得到大幅度提高。与ZnO块体材料相比, 溶胶-凝胶法合成的Zn1-xNixO材料的热导率大幅度降低, 在750 K时, Zn1-xNixO的热导率降低至3 W/(m·K), 是ZnO (11 W/(m·K))材料的1/3。电导率的增加和热导率的降低导致热电优值大幅度提高。在750 K下, Zn0.925Ni0.025O材料的热电优值达到0.045。
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| 关 键 词： | ZnO 热电性能 溶胶-凝胶 热导率 |
| 收稿时间： | 2012-11-19 |
| 修稿时间： | 2013-01-02 |
Thermoelectric Properties of Ni-doped ZnO Synthesized by Sol-Gel Processing |
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| WU Zi-Hua,XIE Hua-Qing,ZENG Qing-Feng. Thermoelectric Properties of Ni-doped ZnO Synthesized by Sol-Gel Processing[J]. Journal of Inorganic Materials, 2013, 28(9): 921-924. DOI: 10.3724/SP.J.1077.2013.12696 |
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| Authors: | WU Zi-Hua XIE Hua-Qing ZENG Qing-Feng |
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| Affiliation: | (School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China) |
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| Abstract: | Zn1-xNixO nanoparticles were prepared by Sol-Gel processing. Scanning electron microscope observations indicated that nanoparticles were mainly flake structure with many honeycombed passages on the surface of nanoparticles. For the sintered samples, the solubility limit of Ni in the Zn1-xNixO wurtzite structure was found to be 0.05. All doped samples showed n-type semiconducting conductivity. The increase of x led to a significant decrease in absolute value of Seebeck coefficient (|S|). Over the entire temperature range, the thermal conductivity of Zn1-xNixO samples was much lower than that of bulk ZnO sample. The highest ZT (0.045) was obtained for Zn0.925Ni0.075O at 750 K. |
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