Low thermal conductivity of SrTiO3-LaTiO3 and SrTiO3-SrNbO3 thermoelectric oxide solid solutions

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dc.contributor.authorZhang, Yuqiaoko
dc.contributor.authorCho, Hai Junko
dc.contributor.authorSugo, Kenyuko
dc.contributor.authorMikami, Masashiko
dc.contributor.authorWoo, Sungminko
dc.contributor.authorJung, Myung-Chulko
dc.contributor.authorZhuang, Yao-Huako
dc.contributor.authorBin Fengko
dc.contributor.authorSheu, Yu-Miinko
dc.contributor.authorShin, Woosuckko
dc.contributor.authorChoi, Woo Seokko
dc.contributor.authorHan, Myung Joonko
dc.contributor.authorIkuhara, Yuichiko
dc.contributor.authorOhta, Hiromichiko
dc.date.accessioned2021-06-22T01:30:20Z-
dc.date.available2021-06-22T01:30:20Z-
dc.date.created2021-05-17-
dc.date.created2021-05-17-
dc.date.issued2021-08-
dc.identifier.citationJOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.104, no.8, pp.4075 - 4085-
dc.identifier.issn0002-7820-
dc.identifier.urihttp://hdl.handle.net/10203/286072-
dc.description.abstractElectron-doped SrTiO3 has been attracting attention as oxide thermoelectric materials, which can convert wasted heat into electricity. The power factor of the electron-doped SrTiO3, including SrTiO3-LaTiO3 and SrTiO3-SrNbO3 solid solutions, has been clarified. However, their thermal conductivity (kappa) has not been clearly identified thus far. Only a high kappa (>12 W m(-1) K-1) has been assumed from the electron contribution based on Wiedemann-Franz law. Here, we show that the kappa of the electron-doped SrTiO3 is lower than the assumed kappa, and its highest ZT exceeded 0.1 at room temperature. The kappa slightly decreased with the carrier concentration (n) when n is below 4 x 10(21) cm(-3). In the case of SrTiO3-SrNbO3 solid solutions, an upturn in kappa was observed when n exceeds 4 x 10(21) cm(-3) due to the contribution of conduction electron to the kappa. On the other hand, kappa decreased in the case of SrTiO3-LaTiO3 solid solutions probably due to the lattice distortion, which scatters both electrons and phonons. The highest ZT was 0.11 around n = 1 x 10(21) cm(-3). These findings would be useful for the future design of electron-doped SrTiO3-based thermoelectric materials.-
dc.languageEnglish-
dc.publisherWILEY-
dc.titleLow thermal conductivity of SrTiO3-LaTiO3 and SrTiO3-SrNbO3 thermoelectric oxide solid solutions-
dc.typeArticle-
dc.identifier.wosid000643143800001-
dc.identifier.scopusid2-s2.0-85104717236-
dc.type.rimsART-
dc.citation.volume104-
dc.citation.issue8-
dc.citation.beginningpage4075-
dc.citation.endingpage4085-
dc.citation.publicationnameJOURNAL OF THE AMERICAN CERAMIC SOCIETY-
dc.identifier.doi10.1111/jace.17797-
dc.contributor.localauthorHan, Myung Joon-
dc.contributor.nonIdAuthorZhang, Yuqiao-
dc.contributor.nonIdAuthorCho, Hai Jun-
dc.contributor.nonIdAuthorSugo, Kenyu-
dc.contributor.nonIdAuthorMikami, Masashi-
dc.contributor.nonIdAuthorWoo, Sungmin-
dc.contributor.nonIdAuthorJung, Myung-Chul-
dc.contributor.nonIdAuthorZhuang, Yao-Hua-
dc.contributor.nonIdAuthorBin Feng-
dc.contributor.nonIdAuthorSheu, Yu-Miin-
dc.contributor.nonIdAuthorShin, Woosuck-
dc.contributor.nonIdAuthorChoi, Woo Seok-
dc.contributor.nonIdAuthorIkuhara, Yuichi-
dc.contributor.nonIdAuthorOhta, Hiromichi-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorlattice distortion-
dc.subject.keywordAuthorpolaron-
dc.subject.keywordAuthorstrontium titanate-
dc.subject.keywordAuthorthermal conductivity-
dc.subject.keywordAuthorthermoelectrics-
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