水热合成Sb2Se3纳米线及其对Bi2Te3纳米粉末热电性能的影响

doi:10.3724/SP.J.1077.2010.00615

无机材料学报 ›› 2010, Vol. 25 ›› Issue (6): 615-620.DOI: 10.3724/SP.J.1077.2010.00615

水热合成Sb₂Se₃纳米线及其对Bi₂Te₃纳米粉末热电性能的影响

张艳华^{1, 2}, 徐桂英¹, 郭志敏², 韩菲¹, 王泽¹, 葛昌纯¹

(1. 北京科技大学特种陶瓷与粉末冶金研究所, 北京新能源材料重点实验室, 北京100083; 2. 装备指挥技术学院士官系, 北京102249)

收稿日期:2009-10-14 修回日期:2009-12-03 出版日期:2010-06-20 网络出版日期:2010-05-12

Effects of Hydrothermaly Synthesized Sb₂Se₃ Nanowires on the Thermoelectric Properties of Bi₂Te₃ Nanopowders

ZHANG Yan-Hua^1,2, XU Gui-Ying¹, GUO Zhi-Min², HAN Fei¹, WANG Ze¹, GE Chang-Chun¹

(1. Institute of Special Ceramics and Powder Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; 2. Academy of Equipment Command & Technology, Beijing 102249, China)

Received:2009-10-14 Revised:2009-12-03 Published:2010-06-20 Online:2010-05-12

摘要/Abstract

摘要： 以SbCl₃和Se粉为原料, 水合肼(N₂H₄·H₂O)为还原剂, 采用水热法在150℃下, 分别保温不同的时间合成Sb₂Se₃纳米粉末. 通过X射线衍射(XRD)、场发射电子扫描电镜(FESEM)、透射电镜(TEM)以及高分辨透射电镜(HRTEM)等分析方法对产物的物相成分和微观形貌等进行了表征, 实验结果表明保温时间达到24h时, 获得产物为单相Sb₂Se₃纳米线晶体. 根据实验结果还研究了水热合成Sb₂Se₃纳米线晶体可能的反应及生长机理, 结果表明一维纳米线沿[001]方向生长, 纳米线的形成与其独特的层状晶体结构有关. 最后采用放电等离子体快速热压烧结法将水热合成的Bi₂Te₃纳米粉末与不同含量Sb₂Se₃纳米线进行复合, 分析了Sb₂Se₃纳米线对Bi2Te3纳米材料热电性能的影响, 发现复合约1 at% Sb₂Se₃纳米线可以使Bi2Te3纳米材料热电性能有一定提高.

关键词: 水热合成, Sb₂Se₃, 纳米线, 热电性能

Abstract: Sb₂Se₃nanowires were synthesized by a hydrothermal method at 150℃ for 3, 6,12 and 24 h using SbCl₃ and Se powder as the precursors, N₂H₄·H₂O as reductant. X-ray diffraction (XRD), transmission electron microscope (TEM), field emission scanning electron microscope (FESEM) and high-resolution TEM (HRTEM) were applied to analyze the phase distributions, microstructures and grain sizes of the nanostructured Sb₂Se₃. It was found that the pure orthorhombic Sb₂Se₃ nanowires were formed at 150℃ for 24h by the hydrothermal synthesis method. The reaction mechanism and crystal growth mechanism of Sb₂Se₃nanowires were investigated in the light of the experimental results. The Sb₂Se₃nanowires grow along the [001] direction. The formation mechanism is mainly related to the special crystal structure of Sb2Se3. The TE properties of SPS nanocomposites of Bi₂Te₃with different amount of Sb₂Se₃ nanowires were investigated. The addition of 1 at% Sb₂Se₃ nanowires can improve the electric properties of the Bi₂Te₃ nanopowders.

Key words: hydrothermal synthesis, Sb₂Se₃, nanowires, thermoelectric properties

中图分类号:

TQ134

张艳华1, 2, 徐桂英1, 郭志敏2, 韩菲1, 王泽1, 葛昌纯1. 水热合成Sb₂Se₃纳米线及其对Bi₂Te₃纳米粉末热电性能的影响[J]. 无机材料学报, 2010, 25(6): 615-620.

ZHANG Yan-Hua1,2, XU Gui-Ying1, GUO Zhi-Min2, HAN Fei1, WANG Ze1, GE Chang-Chun1. Effects of Hydrothermaly Synthesized Sb₂Se₃ Nanowires on the Thermoelectric Properties of Bi₂Te₃ Nanopowders[J]. Journal of Inorganic Materials, 2010, 25(6): 615-620.

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水热合成Sb₂Se₃纳米线及其对Bi₂Te₃纳米粉末热电性能的影响

Effects of Hydrothermaly Synthesized Sb₂Se₃ Nanowires on the Thermoelectric Properties of Bi₂Te₃ Nanopowders

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