{"title":"通过溶热合成实现铋镁共掺杂 SnTe 材料的低热导率","authors":"Anita, Vivek Gupta, Abhishek Pandey","doi":"10.1007/s12034-024-03271-8","DOIUrl":null,"url":null,"abstract":"<p>There is significant interest in the utilization of inorganic materials with low thermal conductivity (<i>κ</i>) in thermoelectric applications. A key strategy for reducing thermal conductivity through phonon scattering is the formation of synthetic nanostructures. In this study, we synthesized pure SnTe and Bi–Mg co-doped SnTe materials via the solvothermal method. We report very low thermal conductivity of ~2.17 W m<sup>−1</sup> K<sup>−1</sup> at room temperature in pure SnTe. The notable low thermal conductivity in SnTe is mostly attributable to its nanometre-sized crystallites. Bi and Mg substitution in SnTe significantly lowers <i>κ</i> value from 2.17 to 0.5 W m<sup>−1</sup> K<sup>−1</sup> for Sn<sub>0.94</sub>Bi<sub>0.03</sub>Mg<sub>0.03</sub>Te sample at 300 K, reducing it by ~4 times compared to pure SnTe. Point defect scattering of phonons due to Bi–Mg co-doping may also lower thermal conductivity. This study reveals a potential novel approach to achieve low thermal conductivities in SnTe through nanoscale engineering.</p>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Low thermal conductivity in Bi–Mg co-doped SnTe material via solvothermal synthesis\",\"authors\":\"Anita, Vivek Gupta, Abhishek Pandey\",\"doi\":\"10.1007/s12034-024-03271-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>There is significant interest in the utilization of inorganic materials with low thermal conductivity (<i>κ</i>) in thermoelectric applications. A key strategy for reducing thermal conductivity through phonon scattering is the formation of synthetic nanostructures. In this study, we synthesized pure SnTe and Bi–Mg co-doped SnTe materials via the solvothermal method. We report very low thermal conductivity of ~2.17 W m<sup>−1</sup> K<sup>−1</sup> at room temperature in pure SnTe. The notable low thermal conductivity in SnTe is mostly attributable to its nanometre-sized crystallites. Bi and Mg substitution in SnTe significantly lowers <i>κ</i> value from 2.17 to 0.5 W m<sup>−1</sup> K<sup>−1</sup> for Sn<sub>0.94</sub>Bi<sub>0.03</sub>Mg<sub>0.03</sub>Te sample at 300 K, reducing it by ~4 times compared to pure SnTe. Point defect scattering of phonons due to Bi–Mg co-doping may also lower thermal conductivity. This study reveals a potential novel approach to achieve low thermal conductivities in SnTe through nanoscale engineering.</p>\",\"PeriodicalId\":502,\"journal\":{\"name\":\"Bulletin of Materials Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of Materials Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s12034-024-03271-8\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12034-024-03271-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
人们对在热电应用中使用低热导率 (κ)无机材料兴趣浓厚。通过声子散射降低热导率的一个关键策略是形成合成纳米结构。在本研究中,我们通过溶热法合成了纯锡碲和铋镁共掺杂锡碲材料。我们发现纯 SnTe 的热导率非常低,室温下约为 2.17 W m-1 K-1。SnTe的热导率显著偏低主要归因于其纳米尺寸的晶体。在 300 K 下,Sn0.94Bi0.03Mg0.03Te 样品的κ值从 2.17 W m-1 K-1 显著降低到 0.5 W m-1 K-1,比纯 SnTe 降低了约 4 倍。铋镁共掺导致的点缺陷声子散射也可能降低热导率。这项研究揭示了一种潜在的新方法,即通过纳米工程实现锡碲的低热导率。
Low thermal conductivity in Bi–Mg co-doped SnTe material via solvothermal synthesis
There is significant interest in the utilization of inorganic materials with low thermal conductivity (κ) in thermoelectric applications. A key strategy for reducing thermal conductivity through phonon scattering is the formation of synthetic nanostructures. In this study, we synthesized pure SnTe and Bi–Mg co-doped SnTe materials via the solvothermal method. We report very low thermal conductivity of ~2.17 W m−1 K−1 at room temperature in pure SnTe. The notable low thermal conductivity in SnTe is mostly attributable to its nanometre-sized crystallites. Bi and Mg substitution in SnTe significantly lowers κ value from 2.17 to 0.5 W m−1 K−1 for Sn0.94Bi0.03Mg0.03Te sample at 300 K, reducing it by ~4 times compared to pure SnTe. Point defect scattering of phonons due to Bi–Mg co-doping may also lower thermal conductivity. This study reveals a potential novel approach to achieve low thermal conductivities in SnTe through nanoscale engineering.
期刊介绍:
The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.