Phase separation and thermoelectric properties of Ag2Te-doped PbTe0.9S0.1
文献类型：期刊论文
| 作者 | Zhang, H ; Luo, J ; Zhu, HT ; Liang, JK ; Ruan, LM ; Liu, QL ; Li, JB ; Liu, GY |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2012 |
| 卷号 | 60期号:20页码:7241 |
| ISSN号 | 1359-6454 |
| 关键词 | LEAD-TELLURIDE HIGH FIGURE NANOSTRUCTURED THERMOELECTRICS POWER-GENERATION MERIT PBTE PERFORMANCE SYSTEM MICROSTRUCTURE AGPBMSBTE2+M |
| 通讯作者 | Luo, J (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Spinodal decomposition is an ideal mechanism for producing bulk nanostructured materials with promising thermoelectric (TE) performance. In this contribution, the phase separation and TE properties of PbTe-PbS samples are investigated. Phase separation driven by spinodal decomposition is observed in PbTe0.4S0.6, PbTe0.5S0.5, PbTe0.6S0.4 and (PbTe0.9S0.1)(1-x)(Ag2Te)(x) with x = 0, 0.01 and 0.03. The addition of Ag2Te leads to a deterioration in electrical transport properties at low temperature but to a significantly enhanced higher-temperature power factor of the Ag2Te-doped PbTe0.9S0.1 sample. The very low thermal conductivity of the Ag2Te-doped sample is attributed to the doping effect of Ag2Te, the precipitated Ag2Te, and the nanoscale phase segregation driven by spinodal decomposition. In particular, the spinodal decomposition produces finely dispersed PbTe-rich and PbS-rich phases with solute atoms, coherent or semi-coherent interfaces, lattice bending, and other lattice defects, which contribute to the phonon scattering and minimize the thermal conductivity. The highest TE figure of merit, ZT, is similar to 1.2 at 773 K for the sample with x = 0.03, and even larger ZT values at higher temperature might be expected based on its tendency to increase with the temperature. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 资助信息 | National Natural Science Foundation of China [51172276, 11144002] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50792]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang, H,Luo, J,Zhu, HT,et al. Phase separation and thermoelectric properties of Ag2Te-doped PbTe0.9S0.1[J]. ACTA MATERIALIA,2012,60(20):7241. |
| APA | Zhang, H.,Luo, J.,Zhu, HT.,Liang, JK.,Ruan, LM.,...&Liu, GY.(2012).Phase separation and thermoelectric properties of Ag2Te-doped PbTe0.9S0.1.ACTA MATERIALIA,60(20),7241. |
| MLA | Zhang, H,et al."Phase separation and thermoelectric properties of Ag2Te-doped PbTe0.9S0.1".ACTA MATERIALIA 60.20(2012):7241. |
入库方式： OAI收割
来源：物理研究所
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