Fabrication and Thermoelectric Properties of p-Type Bi1Sb4Te7.5 Alloy Doped with Fe3O4 |
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| Journal | Materials Science Forum (Volumes 510 - 511) |
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| Volume | Eco-Materials Processing & Design VII |
| Edited by | Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee |
| Pages | 1086-1089 |
| DOI | 10.4028/www.scientific.net/MSF.510-511.1086 |
| Citation | Wang Kee Min et al., 2006, Materials Science Forum, 510-511, 1086 |
| Online since | March, 2006 |
| Authors | Wang Kee Min, Chang Ho Lee, Yong Ho Park, Ik Min Park |
| Keywords | Bi, Fe3O4, Mechanical Alloying (MA), Sb, Te, Thermoelectric Material |
| Abstract | We investigated the effects of Fe3O4 (0~0.1 wt.%) on the thermoelectric properties of Bi1Sb4Te7.5 alloy prepared by mechanical alloying process. The Seebeck coefficient increased with Fe3O4 content, but the power factor decreased with Fe3O4 content because of the decreased electrical conductivity. The thermal conductivity decreased with Fe3O4. The carrier concentration measured by the Hall effect measurement decreased with Fe3O4. The thermal conductivity of 0.1 wt.% Fe3O4 alloy was 0.814 W/Km, 20%lower than that of Fe3O4 free alloy. As a result, the small addition of Fe3O4 improved the Z value owing to the decreased thermal conductivity by adding Fe3O4. The Z value of 0.01 wt.% Bi1Sb4Te7.5 alloy was 3.1×10-3 /K, the highest value among the prepared alloys. |
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