Effects of mesoporous silica addition on thermoelectric properties of Nb-doped SrTiO3

Publication: Research - peer-reviewJournal article – Annual report year: 2010

Without internal affiliation

  • Author: Wang, Ning

    Chengdu University of Technology, China

  • Author: Han, Li

    Chengdu University of Technology

  • Author: He, Hongcai

    Chengdu University of Technology

  • Author: Ba, Yaoshuai

    Nagoya University

  • Author: Koumoto, Kunihito

    Nagoya University, Japan

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The effects of mesoporous silica (MS) addition with a low thermal conductivity on the thermoelectric properties of Nb-doped SrTiO3 bulk materials are discussed. Nb-doped SrTiO3 bulk materials with varying amounts of added MS were fabricated by the conventional normal pressure sintering method in an Ar atmosphere. MS addition reduced the thermal conductivity, but enhanced the electrical conductivity significantly. Meanwhile, the Seebeck coefficient was almost independent of MS addition, thus, enhancing the ZT value. The sample with 5vol% MS gave the maximum ZT value of 0.165 at 900K. The reason for the reduced thermal conductivity and enhanced electrical conductivity by MS addition was also investigated.
Original languageEnglish
JournalJournal of Alloys and Compounds
Issue number1-2
Pages (from-to)308-311
StatePublished - 2010
Externally publishedYes
CitationsWeb of Science® Times Cited: 22
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ID: 6232605