Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)最新文献_第3页

Research of temperature and concentration dependences of bismuth transport coefficients on the McClure dispersion law model basis for L-band charge carriers 基于l带载流子麦克卢尔色散定律模型的铋输运系数的温度和浓度依赖性研究

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979911

M. G. Bondarenko, V. Grabov, V. Kulikov, A.S. Parahin, A. V. Sidorov, O.N. Uryupin

引用次数: 0

A two-stage cuboid-styled thermoelectric cooler with switched polarity 具有开关极性的两级长方体热电冷却器

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979926

X. Xuan, K. Ng, C. Yap, H. Chua

引用次数: 7

Thermoelectric property of (Ca,M)TiO/sub 3/ by ab initio calculation 从头计算(Ca,M)TiO/sub 3/的热电性质

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979862

T. Isobe, S. Sugihara, A. Minowa, H. Katanahara

{"title":"Thermoelectric property of (Ca,M)TiO/sub 3/ by ab initio calculation","authors":"T. Isobe, S. Sugihara, A. Minowa, H. Katanahara","doi":"10.1109/ICT.2001.979862","DOIUrl":"https://doi.org/10.1109/ICT.2001.979862","url":null,"abstract":"We study the thermoelectric property of CaTiO/sub 3/ by electronic structure calculations. CaTiO/sub 3/ is an insulator with a high band gap possessing low electrical and thermal conductivity. The DV-X a (discrete variational-X a) method is used. The calculation needs atomic number, position of atoms, kind of atoms and symmetry data for the cluster. We calculated the perovskite type of calcium titanate (CaTiO/sub 3/). This cluster, with transition metal-additions (Ca,M)TiO/sub 3/ forms p-type and n-type semiconductors possessing impurity energy levels of the donor and acceptor between the HOMO (highest occupied molecular orbital) and LUMO (lowest unoccupied molecular orbital). We assumed the Seebeck coefficient depends on the energy gap based on the computer simulation of Sugihara et al. (1999). We substituted Sr and Nb for Ti in CaTiO/sub 3/ and the Seebeck coefficient was calculated from HOMO, LUMO level and the impurity levels. Then the Seebeck coefficient at 500 K was calculated to be 7166 /spl mu/ V/K for CaTiO/sub 3/, 1806 /spl mu/ V/K for Nb-added CaTiO/sub 3/ and 896 /spl mu/ V/K for Sr-added CaTiO/sub 3/, respectively.","PeriodicalId":203601,"journal":{"name":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129844214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Original thermoelectric development of physical concepts, materials and related technologies and applications 原创性发展了热电物理概念、材料及相关技术与应用

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979619

L. Anatychuk

{"title":"Original thermoelectric development of physical concepts, materials and related technologies and applications","authors":"L. Anatychuk","doi":"10.1109/ICT.2001.979619","DOIUrl":"https://doi.org/10.1109/ICT.2001.979619","url":null,"abstract":"The results of generalizations of the Maxwell equations and Faraday law of electromagnetic induction for nonisothermal media are given. It is shown that this generalization creates a radically new description of the processes of thermoelectric energy conversion based on the use of of eddy thermoelectric fields and eddy thermoelectric currents. The basic postulates of the generalized theory of thermoelectric energy conversion are given. New thermoelement types discovered by computer solutions of the inverse thermoelectricity problems are given. Classification of thermoelements is given, including new thermoelement types discovered by solving the inverse problems. The properties of such thermoelements and their peculiarities that allow successful use of thermoelements in thermoelectric instruments and devices are considered. Typical examples of such use in measuring techniques, power engineering and thermoelectric cooling are given and the prospects of using such thermoelements are considered. Figures of merit of materials for new thermoelement types are given, as well as physical and technological methods of attaining the maximum figure of merit. Information is given on the progress in creating thermoelectric cooling modules of increased reliability, with increased supply voltages, increased refrigerating capacity and cyclic stability. Information is also given on the new developments of thermoelectric generator modules with improved characteristics of efficiency, reliability and resistance to temperature cyclic effects. Systems based on such modules with liquid heat-exchangers are considered. The structure of such systems makes possible their easy adaptation to customer demands for electric and thermal characteristics, pressures and flow rates in liquid circuits, etc. Examples are given of using such modules and systems in refrigerators, air-conditioners, heat and electricity generators. Information is given on the Ukrainian program of investigations and thermoelectricity applications.","PeriodicalId":203601,"journal":{"name":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128331627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A review of the new thermoelectric materials 新型热电材料综述

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979602

H. Goldsmid, G. Nolas

{"title":"A review of the new thermoelectric materials","authors":"H. Goldsmid, G. Nolas","doi":"10.1109/ICT.2001.979602","DOIUrl":"https://doi.org/10.1109/ICT.2001.979602","url":null,"abstract":"Most of the materials that are used in today's thermoelectric generators and refrigerators were first developed many years ago. However, during the last decade promising results have been reported for several new systems of compounds and alloys. These include the skutterudites, the clathrates and the half-Heusler alloys. There are also a number of layer-structured compounds, some of which may be regarded as developments of the bismuth telluride system. Certain of these materials seem to possess the highest known figures of merit at least at elevated temperatures. Moreover, it is doubtful that any of the new systems have yet been fully optimized. The problem is that there are large numbers of compounds that remain to be investigated. Here we shall try to formulate some principles that will allow us to select those systems that are likely to yield the best long-term results. We discuss, for example, whether it is better for a material to have a high power factor or a low lattice thermal conductivity. We also consider the relative worth of a large or small effective mass for the charge carriers. Then, of course, one must take account of problems associated with the structure and preparation of the materials. The potential of the new materials for use as low-dimensional thermoelectrics will be included in our discussion.","PeriodicalId":203601,"journal":{"name":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128279713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32

Gradient composite thermoelectric materials 梯度复合热电材料

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979892

Zhang Tongiun, Peng Jiangyin, Yang Junyou, Liu Huafang

引用次数: 0

Mo/sub 6/Se/sub 8/-based Chevrel phase thermoelectric materials Mo/sub - 6/Se/sub - 8基Chevrel相热电材料

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979882

Y. Ohta, H. Uchida, C. Roche, H. Tanahashi, A. Kasama, H. Scherrer, S. Scherrer

{"title":"Mo/sub 6/Se/sub 8/-based Chevrel phase thermoelectric materials","authors":"Y. Ohta, H. Uchida, C. Roche, H. Tanahashi, A. Kasama, H. Scherrer, S. Scherrer","doi":"10.1109/ICT.2001.979882","DOIUrl":"https://doi.org/10.1109/ICT.2001.979882","url":null,"abstract":"Mo/sub 6/Se/sub 8/-based Chevrel phase compounds inserted cations into those cavities are interesting as a new kind of PGEC (Phonon Glass Electron Crystal) thermoelectric materials. Ti and Zn are expected to form attractive Chevrel phase thermoelectric compounds by theoretical considerations. In our previous investigation, however, it seems to be difficult that cations insert sufficiently to cavities. In this study, an attempt to increase the amount of inserted Ti by varying preparation conditions is carried out. It is apparent that this trouble is caused by the formation of a TiSe/sub 2/ secondary phase due to preferential diffusion of Se into Ti, which consequently disturbed the reaction of Mo and Se. Proper heat process and shortening of diffusion distance are effective to distribute inserted Ti-uniformity in Chevrel phase and to decrease secondary phase. According to these analyses, the suitable condition to obtain optimum Chevrel phases, the insert mechanism of cations into the cavities, and the effect of the insertion range of Ti on thermoelectric properties are discussed.","PeriodicalId":203601,"journal":{"name":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125574686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Low temperature thermoelectric properties of Ni doped n-type filled skutterudites Ba/sub 0.3/Co/sub 4/Sb/sub 12/ Ni掺杂n型填充方突石Ba/sub 0.3/Co/sub 4/Sb/sub 12/的低温热电性能

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979824

W. Chen, J. Dyck, C. Uher, L.D. Chen, X.F. Tang, T. Hirai

引用次数: 1

Transport of Ce-Co-Sb skutterudites Ce-Co-Sb滑石的输运

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979827

X. Min, Shenlin Chen, J. An, K. Cai, C. Nan

{"title":"Transport of Ce-Co-Sb skutterudites","authors":"X. Min, Shenlin Chen, J. An, K. Cai, C. Nan","doi":"10.1109/ICT.2001.979827","DOIUrl":"https://doi.org/10.1109/ICT.2001.979827","url":null,"abstract":"The correlation among composition, structure, chemical bond and transport of unfilled skutterudite CoSb/sub 3/ and filled skutterudite CeCo/sub 5/Fe/sub 3/Sb/sub 12/ has been studied using the density function and discrete variation (DFT-DVM) method. Three models for filled skutterudite study were proposed and calculated to describe the \"rattling\" pattern. Model 1 is with Ce in the center, model 2 is with Ce away from the center and near to Sb, and model 3 is also with Ce away from the center but near to Fe. Due to the different changes between ionic and covalent bonds, there is less difference in stability among the models 1, 2 and 3. Therefore, these different models can exist at the same time, or can translate from one to another more easily. In other words, the \"rattling\" pattern has taken place. The covalent bond of Co-Sb or Fe-Sb in filled models is weaker than that of Co-Sb in unfilled models, as an electrical cloud of Sb takes part in the covalent bond of Ce-Sb in the filled models. The result is consistent with the experimental result that the thermal conductivity of CeCo/sub 5/Fe/sub 3/Sb/sub 12/ is lower than that of CoSb/sub 3/, and the thermoelectric property of CeCo/sub 5/Fe/sub 3/Sb/sub 12/ is better than that of CoSb/sub 3/.","PeriodicalId":203601,"journal":{"name":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126024302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermoelectric properties and microstructure of SnTe-Bi/sub 2/Te/sub 3/ alloys SnTe-Bi/sub - 2/Te/sub - 3合金的热电性能和显微组织

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI: 10.1109/ICT.2001.979834

Xisong Zhou, J. Nan, Junbo Wu, C. Nan

引用次数: 2