Effects of Sintering Temperature on Thermoelectric Device of La-Doped Strontium Titanate in the Combination of Combustion Synthesis and Spark Plasma Sintering

Kikuchi, Asami; Zhang, Lihua; Okinaka, Noriyuki et al.

MATERIALS TRANSACTIONS, 2009, 50(11), 2675-2679

Permalink : https://hdl.handle.net/2115/77015

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アクセス権
open access
URI
https://hdl.handle.net/2115/77015
タイトル
Effects of Sintering Temperature on Thermoelectric Device of La-Doped Strontium Titanate in the Combination of Combustion Synthesis and Spark Plasma Sintering
著者
Kikuchi, Asami ; Zhang, Lihua ; Okinaka, Noriyuki ; Tosho, Tsuyoshi ; Akiyama, Tomohiro
著者名
Kikuchi, Asami
e-Rad_Researcher
60719714
著者名
Zhang, Lihua
e-Rad_Researcher
20250483
著者名
Okinaka, Noriyuki
著者名
Tosho, Tsuyoshi
e-Rad_Researcher
50175808
著者名
Akiyama, Tomohiro
言語
英語
キーワード
thermoelectric materials
perovskite oxide
combustion synthesis
spark plasma sintering
発行日
2009-11-01
出版者
The Japan Institute of Metals
日本金属学会
収録物名
MATERIALS TRANSACTIONS
巻(号)
50(11)
ページ
2675-2679
抄録
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.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
PISSN
1345-9678
EISSN
1347-5320
NCID
AA1151294X
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.2320/matertrans.M2009225