Development of thermoelectric module based on dense Ca3Co 4O9 and Zn0.98Al0.02O legs

Paolo Mele, Hiroyuki Kamei, Hiroyuki Yasumune, Kaname Matsumoto, Koji Miyazaki

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Ca3Co4O9 (p-type) and Zn 0.98Al0.02O (n-type) pellets were prepared by conventional sintering (CS) and Spark Plasma sintering (SPS) starting from the oxides. The best p-type sample was SPS Ca3Co4O9 obtained from pre-sintered pellets, with electrical conductivity σ = 144 S/cm and Seebeck coefficient S = 172 μV/K at 800 °C, while thermal conductivity κ = 2.00 W/m×K and figure of merit ZT = 0.23. The best n-type sample was CS Zn0.98Al0.02O showing σ = 83 S/cm and S = -268 μV/K at 800 °C, while = 5.03 W/m×K and ZT = 0.127. The output power of a module based on SPS Ca3Co4O9 and CS Zn0.98Al0.02O legs was 2.26 mW (with T = 500 °C, ΔT = 248 °C).

Original languageEnglish
Pages (from-to)389-397
Number of pages9
JournalMetals and Materials International
Issue number2
Publication statusPublished - 2014 Mar
Externally publishedYes


  • Oxides
  • electrical conductivity resistivity thermopower
  • sintering
  • thermal conductivity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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