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Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96最新文献

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Orientational distribution and procedure parameters in hot pressed (Bi2Te3)/sub 0.90/(Bi2Se3)/sub 0.10/ 热压(Bi2Te3)/sub 0.90/(Bi2Se3)/sub 0.10/的取向分布及工艺参数
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553252
K. Fukuda, H. Imaizumi, T. Ishii, F. Toyoda, M. Yamanashi, Y. Kibayashi
{"title":"Orientational distribution and procedure parameters in hot pressed (Bi2Te3)/sub 0.90/(Bi2Se3)/sub 0.10/","authors":"K. Fukuda, H. Imaizumi, T. Ishii, F. Toyoda, M. Yamanashi, Y. Kibayashi","doi":"10.1109/ICT.1996.553252","DOIUrl":"https://doi.org/10.1109/ICT.1996.553252","url":null,"abstract":"Single crystals of Bi/sub 2/Te/sub 3/ and its solid solutions with Bi/sub 2/Se/sub 3/ for n type material show anisotropy of thermoelectric property. Hot-pressed materials also show the anisotropy, but it is weaker than the single crystals and the one directional polycrystals. In a hot pressed material, crystal grains orient with an orientational distribution. In this work, we compared the orientational distributions of hot-pressed materials which were made by different process conditions and attempted to lead the best procedure parameters of a hot-pressed material that give a high Z-value.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125372358","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
Analysis of quadrupole splitting of transition metal doped /spl beta/-FeSi2 掺杂/spl β /-FeSi2过渡金属的四极分裂分析
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553261
S. Kondo, M. Hasaka, T. Morimura
{"title":"Analysis of quadrupole splitting of transition metal doped /spl beta/-FeSi2","authors":"S. Kondo, M. Hasaka, T. Morimura","doi":"10.1109/ICT.1996.553261","DOIUrl":"https://doi.org/10.1109/ICT.1996.553261","url":null,"abstract":"Large quadrupole splittings (Q.S.) are observed in Co doped specimen, compared with other transition metal doped specimens while isomer shifts (I.S.) do not show large value. Since Q.S. is associated with the electric field gradient at nucleus of iron atom; we calculate the potential at nucleus site, assuming the interaction between LA-phonon-conduction electron. Through the calculations, it is found that electric field gradient increase with the number of phonons attached to a conduction electron (=). Accordingly large Q.S. for Co doped specimen are considered to be due to large in comparison with those for other transition metal doped specimen.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125598288","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
Thin film thermoelectric generator cell of Bi-Sb-Te-Se system Bi-Sb-Te-Se系统薄膜热电发电电池
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553520
Ii Kim, Dong-Hi Lee
{"title":"Thin film thermoelectric generator cell of Bi-Sb-Te-Se system","authors":"Ii Kim, Dong-Hi Lee","doi":"10.1109/ICT.1996.553520","DOIUrl":"https://doi.org/10.1109/ICT.1996.553520","url":null,"abstract":"Thin film thermoelectric generator cells (TFTEGCs) of the Bi-Sb-Te-Se system were fabricated and their performances were investigated. The generator cells were composed of several layers of plate-modules, and each plate-module contained 15 p/n couples and was connected electrically in series or in parallel. Variations of the open circuit voltage, short circuit current and maximum output power as a function of temperature difference showed a linear relationship for the first two values, but there was a second-order relationship for the latter. The output power produced per couple and per unit temperature difference was a 3.5 nW/K couple.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125437519","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: 8
Electrical properties of /spl beta/-FeSi2 bulk crystal grown by horizontal gradient freeze method 水平梯度冷冻法生长/spl β /-FeSi2块状晶体的电学性质
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553257
H. Shibata, Y. Makita, H. Kakemoto, Y. Tsai, S. Sakuragi, H. Katsumata, A. Obara, N. Kobayashi, S. Uekusa, T. Tsukamoto, T. Tsunoda, Y. Imai
{"title":"Electrical properties of /spl beta/-FeSi2 bulk crystal grown by horizontal gradient freeze method","authors":"H. Shibata, Y. Makita, H. Kakemoto, Y. Tsai, S. Sakuragi, H. Katsumata, A. Obara, N. Kobayashi, S. Uekusa, T. Tsukamoto, T. Tsunoda, Y. Imai","doi":"10.1109/ICT.1996.553257","DOIUrl":"https://doi.org/10.1109/ICT.1996.553257","url":null,"abstract":"The growth of bulk iron silicide by Horizontal Gradient Freeze (HGF) method was achieved using different growth and annealing conditions. Two types of annealing process, in-situ annealing and ex-situ annealing, were examined. Three types of samples were prepared and examined; (i) samples which were not applied any annealing processes, (ii) samples which were applied in-situ annealing, and (iii) samples which were applied both in-situ and ex-situ annealing. The influence of annealing and growth conditions upon the material qualities was examined and discussed, putting special emphasis on the structural properties and electrical properties. Results of the X-ray diffraction revealed that only the in-situ annealing was not sufficient for the peritectic reaction from /spl alpha/+/spl epsi/ eutectic to peritectic /spl beta/-phase. However, it was revealed that, if the ex-situ annealing is applied after the in-situ annealing, the condition of 900/spl deg/C for 200 hours is enough for the ex-situ annealing to obtain almost single /spl beta/-phase. It was also confirmed in the aspect of electrical properties that ex-situ annealing at 900/spl deg/C for 300 hours is enough to realize electrically semiconducting /spl beta/-FeSi/sub 2/. The sample prepared under such a condition exhibited p-type conductivity with hole concentration and hole mobility about 5.68/spl times/10/sup 17/ cm/sup -3/ and 1.36 cm/sup 2/Ns, respectively.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124809420","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
Evaluation of thermal junction quality in thermoelectric assemblies using transient analysis technology 利用瞬态分析技术评价热电组件的热结质量
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553320
T. Ritzer, M.J. Nagy, R. Buist
{"title":"Evaluation of thermal junction quality in thermoelectric assemblies using transient analysis technology","authors":"T. Ritzer, M.J. Nagy, R. Buist","doi":"10.1109/ICT.1996.553320","DOIUrl":"https://doi.org/10.1109/ICT.1996.553320","url":null,"abstract":"This paper describes the application of the transient analysis test method to evaluate the integrity of thermal junctions in a thermoelectric (TE) assembly. The quality of thermal junctions in assemblies was measured by creating a thermal gradient in the TE modules comprising an assembly and analyzing the decay of the residual Seebeck voltage. A study was made of various junction conditions that exist between the TE module and its heatsinks which are common to most assembly techniques. Poor thermal contacts were deliberately introduced such as insufficient thermal grease, inadequate compression and improper surface finishes in test assemblies in order to simulate typical assembly defects. A direct correlation between good and inadequate thermal junctions was established and illustrated through graphic test data evaluation.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"449 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132055665","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
Radiation defects induced by ion implantation as a promising method of doping semiconductor type AIVBIV films 离子注入诱导辐射缺陷是一种很有前途的掺杂半导体型AIVBIV薄膜的方法
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553523
Z. Dashevsky
{"title":"Radiation defects induced by ion implantation as a promising method of doping semiconductor type AIVBIV films","authors":"Z. Dashevsky","doi":"10.1109/ICT.1996.553523","DOIUrl":"https://doi.org/10.1109/ICT.1996.553523","url":null,"abstract":"Radiation defects in PbTe single crystals and epitaxial films induced by ion implantation of various impurities amounting to as much as 2/spl middot/10/sup 4/ /spl mu/C/cm/sup 2/ have been investigated. It has been found that the formation of point defects (for the most part, Te vacancies) running as deep as 3 /spl mu/m and more determine transport properties due to the stabilization of electron concentration at a level of 2+4/spl middot/10/sup 18/ cm/sup -3/. The data are interpreted based on the model of the quasi-local (doublet) energy level of Te vacancies in the PbTe conduction band. The formation of solid solutions accompanied by the increase of band gap was detected in PbTe thin layers implanted with Zn.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133840301","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
Evaluation of metal-Bi2Te3 contacts by electron tunneling spectroscopy 电子隧穿光谱评价金属- bi2te3接触
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553515
J. Nagao, E. Hatta, K. Mukasa
{"title":"Evaluation of metal-Bi2Te3 contacts by electron tunneling spectroscopy","authors":"J. Nagao, E. Hatta, K. Mukasa","doi":"10.1109/ICT.1996.553515","DOIUrl":"https://doi.org/10.1109/ICT.1996.553515","url":null,"abstract":"Understanding the states of the metal electrode-semiconductor junctions is important for improving the performance of the thermoelectric devices. Tunneling spectroscopy has been applied to the evaluation of metal-semiconductor Schottky junctions. In this study, tunneling spectroscopy is applied to understanding the states of a metal/Bi/sub 2/Te/sub 3/ or a metal/Bi/sub 2/Se/sub 3/ junction. Bi/sub 2/Te/sub 3/ and Bi/sub 2/Se/sub 3/ single crystals were prepared by Bridgman method. The metal contacts were made on the cleavage surface of Bi/sub 2/Te/sub 3/ or Bi/sub 2/Se/sub 3/ by the thermal evaporation in the vacuum of 10/sup -3/ Pa. All tunnel conductance were measured at 4.2 K. Mg/, Al/ and Ag/Bi/sub 2/Te/sub 3/ junctions exhibit V-shaped tunnel conductance curves which indicate that these contacts ate the Schottky barrier. A Au/Bi/sub 2/Te/sub 3/ junction shows a flat conductance characteristic, so that we expect to be an ohmic contact formed in this junction. It becomes clear that the Schottky barrier is formed on the Mg/, Al/, or Ag/-Bi/sub 2/Te/sub 3/ junction. In the case of Au/ or Al/Bi/sub 2/Se/sub 3/ is also formed the Schottky barrier. Since Bi/sub 2/Te/sub 3/ and Bi/sub 2/Se/sub 3/, which are narrow energy gap semiconductors, form the Schottky barriers with those metals, the characterization of metal-semiconductor contacts is important to improve the performance of thermoelectric devices.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"661 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123050514","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: 7
Influence of air heat sink geometry on the performance of thermoelectric cooling modules 空气散热器几何形状对热电冷却模块性能的影响
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553498
W. Zheng, G. Xu
{"title":"Influence of air heat sink geometry on the performance of thermoelectric cooling modules","authors":"W. Zheng, G. Xu","doi":"10.1109/ICT.1996.553498","DOIUrl":"https://doi.org/10.1109/ICT.1996.553498","url":null,"abstract":"Maximizing the rate of heat removal from the hot side of thermoelectric cooling modules is necessary to obtain optimum performance for any thermoelectric cooling device. The thickness, shape, height of fins and number of fins per inch are all important variables in a finned heat sink design. The area and thickness of the heat sink base plate relative to the area of the thermoelectric module is also important. This paper provides a means to calculate the effectiveness of these variables as they affect heat dissipation from the hot side of a thermoelectric module operated in the cooling mode. Although the focus is on cooling devices, the results of this model should be equally useful in evaluating power-generating devices.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117100976","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: 4
Potential applications of advanced thermoelectrics in the automobile industry 先进热电技术在汽车工业中的潜在应用
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553509
D. Morelli
{"title":"Potential applications of advanced thermoelectrics in the automobile industry","authors":"D. Morelli","doi":"10.1109/ICT.1996.553509","DOIUrl":"https://doi.org/10.1109/ICT.1996.553509","url":null,"abstract":"Several proposed applications of thermoelectric devices in the automobile industry are reviewed. These are: exhaust gas thermoelectric generator; air conditioning (thermoelectric cooling); and microelectronics cooling using thin-film thermoelectrics. The key to the realization of these technologies is the continued development of new materials with increased thermoelectric efficiency.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123827157","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: 26
The design problems of thermoelectric heat pumps for transportation facilities 交通运输用热电热泵的设计问题
Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96 Pub Date : 1996-03-26 DOI: 10.1109/ICT.1996.553310
A. A. Aivazov, Y.I. Stern, K. Makhratchev, A.V. Morgal
{"title":"The design problems of thermoelectric heat pumps for transportation facilities","authors":"A. A. Aivazov, Y.I. Stern, K. Makhratchev, A.V. Morgal","doi":"10.1109/ICT.1996.553310","DOIUrl":"https://doi.org/10.1109/ICT.1996.553310","url":null,"abstract":"The paper describes the problems of design and construction development of thermoelectric (TH) air chillers for different means of transport. The report contains the description of the temperature operating conditions of TH air chillers and the procedures of the TH air chiller testing. The results of the stand operation of the TH air chiller at various voltages are analyzed. The paper highlights TH module mathematical modeling by means of equations account for the variation of the main TH properties across the thermocouple with the temperature gradient. The modeling of TH module operation is based on the numerical solution of a second order nonlinear differential equation. The solution obtained is compared with the results from a crude method and from the stand testing.","PeriodicalId":447328,"journal":{"name":"Fifteenth International Conference on Thermoelectrics. Proceedings ICT '96","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128469094","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
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