Development of Al2O3-ZnO/Ca3Co 4O9 module for thermoelectric power generation

Paolo Mele, Kaname Matsumoto, Takeshi Azuma, Keita Kamesawa, Saburo Tanaka, Jun Ichiro Kurosaki, Koji Miyazaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)


Pure and Al2O3 (2%, 5%, 8%) doped sintered ZnO (n-type) and pure sintered Ca3Co4O9 (p-type) pellets were prepared by conventional solid state synthesis starting from the oxides. The sintered pellets were cut by a diamond saw in a pillar shape (15 mm X 5 mm X 5 mm) for physical properties measurements. The best doped sample was 2 % Al2O3 ZnO showing Seebeck coefficient S = -180 mV/K and electrical conductivity σ = 8 S/cm at 400°C, while thermal conductivity κ = 1.8 W/mxK at 600°C. Typical values for Ca 3Co4O9 were S = 82.5 mV/K and σ = 125 S/cm at 800°C, while κ = 1.01 W/m X K at 600°C. Several modules fabricated by elements cut from sintered pellets were tested and the best performance was obtained in the module formed by six 2 % Al2O 3-ZnO/ Ca3Co4O9 couples, that generated an output power P = 3.7 X 10-5 W at 500°C (when, ΔT = 260°C).

Original languageEnglish
Title of host publicationMaterials and Devices for Thermal-to-Electric Energy Conversion
PublisherMaterials Research Society
Number of pages6
ISBN (Print)9781605111391
Publication statusPublished - 2009
Externally publishedYes
Event2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion - San Francisco, CA, United States
Duration: 2009 Apr 132009 Apr 17

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion
Country/TerritoryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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