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Thermoelectric Properties of Combustion Synthesized and Spark Plasma Sintered Sr1-xRxTiO3 (R = Y, La, Sm, Gd, Dy, 0<x≤0.1)
Title: | Thermoelectric Properties of Combustion Synthesized and Spark Plasma Sintered Sr1-xRxTiO3 (R = Y, La, Sm, Gd, Dy, 0<x≤0.1) |
Authors: | Zhang, Lihua Browse this author →KAKEN DB | Tosho, Tsuyoshi Browse this author | Okinaka, Noriyuki Browse this author →KAKEN DB | Akiyama, Tomohiro Browse this author →KAKEN DB |
Keywords: | thermoelectric properties | combustion synthesis | spark plasma sintering | rare earth | power factor |
Issue Date: | 1-Aug-2007 |
Publisher: | The Thermoelectrics Society of Japan |
Journal Title: | MATERIALS TRANSACTIONS |
Volume: | 48 |
Issue: | 8 |
Start Page: | 2088 |
End Page: | 2093 |
Publisher DOI: | 10.2320/matertrans.E-MRA2007836 |
Abstract: | Thermoelectric properties of combustion synthesized and spark plasma sintered rare-earth-doped (Y, La, Sm, Gd and Dy) SrTiO3 was investigated from room temperature to 870 K toward the viewpoint of energy and time saving without deterioration in thermoelectric properties. All the rare-earth-doped SrTiO3 were successfully synthesized and sintered with high purities and high densities. With temperature increasing, the absolute value of Seebeck coefficient increased and the electric conductivity decreased; the power factor of all the samples decreased except Y-doped sample in the experimental temperature range. In all the samples, the La-doped SrTiO3 and the Y-doped SrTiO3 had the highest and the lowest power factor, respectively. The dimensionless figure of merit ZT of La-doped samples with different doping amount was evaluated and the maximum ZT was 0.22, which was obtained at 800 K from Sr0.92La0.08TiO3 sample. Comparing Y and La-doped samples prepared by our method with that of conventional solid-state reaction method, the thermoelectric properties of our samples were relatively higher. Thus the combination of combustion synthesis and spark plasma sintering has a potential to prepare perovskite-oxide materials with relatively higher thermoelectric properties for high-temperature application. |
Type: | article |
URI: | http://hdl.handle.net/2115/77447 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 張 麗華
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