caa a22 4500 463234448 CHVBK 20180405153252.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10853-006-1128-y doi (NATIONALLICENCE)springer-10.1007/s10853-006-1128-y Thermoelectric properties of the welded Cu/Bi0.88 Sb0.12 /Cu composites in the temperature region from 193K to 298K [Elektronische Daten] [Hirotaka Odahara, Satoru Hiki, Osamu Yamashita, Sunao Sugihara] The resultant thermoelectric properties of Cu/T/Cu composites welded with $${\hbox{T}=\hbox{Bi}_{0.88}\hbox{Sb}_{0.12}}$$ alloy were measured in the temperature range from T=193K to 298K and compared with those calculated as a function of x by treating these composites as an electrical and thermal circuit, where x is the ratio of thickness of Bi-Sb alloy to the interval between two thermocouples. Consequently, the resultant electrical resistivities ρ of composites coincided closely with the calculated ρ values as a function of x, while the resultant Seebeck coefficients α were enhanced significantly in the range from x=0.076 to 0.61. In the x range from 0.16 to 1.0, the x-dependence of the resultant thermoelectric power factor P was found to be explained roughly at every temperature by the simple model proposed here when an enhancement factor in α was taken into the calculation. However, the maximum resultant P appeared at a small x of 0.076. The resultant P at x=0.076 increases with a decrease of T and reached a surprisingly great value of 128.3mW/K2m at 193K, which is 15.5times larger than 8.29mW/K2m obtained for Bi0.88Sb0.12 alloy. On the other hand, its resultant ZT also increases monotonically with a decrease of T and has a great value of 0.54at 193K, which is 31% higher than 0.41at 193K for Bi-Sb alloy. The significant enhancement in the resultants P and ZT at low temperatures is owing predominantly to the increase in α due to the boundary effect. Springer Science+Business Media, LLC, 2007 Odahara Hirotaka Faculty of Engineering, Ehime University, 790-8577, Bunkyocho, Matsuyama, Japan aut Hiki Satoru Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, 1-1-25, Tsujido Nishikaigan, 251-8511, Fujisawa, Japan aut Yamashita Osamu Faculty of Engineering, Ehime University, 790-8577, Bunkyocho, Matsuyama, Japan aut Sugihara Sunao Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, 1-1-25, Tsujido Nishikaigan, 251-8511, Fujisawa, Japan aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/15(2007-08-01), 6004-6010 0022-2461 42:15<6004 2007 42 10853 https://doi.org/10.1007/s10853-006-1128-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1128-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Odahara Hirotaka Faculty of Engineering, Ehime University, 790-8577, Bunkyocho, Matsuyama, Japan aut NATIONALLICENCE 700 1- Hiki Satoru Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, 1-1-25, Tsujido Nishikaigan, 251-8511, Fujisawa, Japan aut NATIONALLICENCE 700 1- Yamashita Osamu Faculty of Engineering, Ehime University, 790-8577, Bunkyocho, Matsuyama, Japan aut NATIONALLICENCE 700 1- Sugihara Sunao Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, 1-1-25, Tsujido Nishikaigan, 251-8511, Fujisawa, Japan aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/15(2007-08-01), 6004-6010 0022-2461 42:15<6004 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer