|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Effects of Sintering Temperature on Thermoelectric Device of La-Doped Strontium Titanate in the Combination of Combustion Synthesis and Spark Plasma Sintering
| Title: | Effects of Sintering Temperature on Thermoelectric Device of La-Doped Strontium Titanate in the Combination of Combustion Synthesis and Spark Plasma Sintering |
| Authors: | Kikuchi, Asami Browse this author | | Zhang, Lihua Browse this author →KAKEN DB | | Okinaka, Noriyuki Browse this author →KAKEN DB | | Tosho, Tsuyoshi Browse this author | | Akiyama, Tomohiro Browse this author →KAKEN DB |
| Keywords: | thermoelectric materials | | perovskite oxide | | combustion synthesis | | spark plasma sintering |
| Issue Date: | 1-Nov-2009 |
| Publisher: | The Japan Institute of Metals |
| Journal Title: | MATERIALS TRANSACTIONS |
| Volume: | 50 |
| Issue: | 11 |
| Start Page: | 2675 |
| End Page: | 2679 |
| Publisher DOI: | 10.2320/matertrans.M2009225 |
| Abstract: | Thermoelectric properties of La-doped SrTiO3 were investigated in order to determine the optimum sintering temperature for its fabrication by using a combination of combustion synthesis and spark plasma sintering. Combustion-synthesized samples (Sr1−xLaxTiO3, x=0.08) were subjected to spark plasma sintering at temperatures from 1513 to 1663 K. The average grain size of sintered Sr0.92La0.08TiO3 enlarged as sintering temperature rose up. The maximum average grain size was 23.5 μm for a sintering temperature of 1663 K. The thermoelectric properties of sintered Sr0.92La0.08TiO3 were measured from room temperature to 1073 K. The optimum sintering temperature in the experimental sintering temperature range was 1633 K. Among the samples, the Sr0.92La0.08TiO3 sample sintered at 1633 K showed the maximum power factor of 1.51×10−3 Wm−1K−1 at 375 K. Further, we investigated the effects of pressing direction during sintering on the thermoelectric properties of combustion-synthesized Sr0.92La0.08TiO3. The combustion-synthesized samples were sintered well along the pressing direction during sintering; therefore, the electric conductivity measured along the pressing direction during sintering was more than twice that measured along the direction perpendicular to the pressing direction during sintering. Thus, we concluded that pressing direction during sintering affected the electric property of Sr0.92La0.08TiO3. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/77015 |
| 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)
|
Submitter: 沖中 憲之
|
