Characterization P-Ca₃Co₄O₉ and N-CaMnO₃

Abstract:

We present characterization and thermoelectric properties of oxide thermoelectric materials of P-Ca₃Co₄O₉ and N-CaMnO₃ synthesized by solid state reaction method and sintering in air. The crystalline structure was measured by x-ray diffraction (XRD) and confirmed by transmission electron microscope (TEM). The powder size and gran size of P-Ca₃Co₄O₉ and N-CaMnO₃ were observed by scanning electron microscope (SEM). The electrical resistivity and Seebeck coefficient are measured. It was found that, the P-Ca₃Co₄O₉shows the point symmetry groups in three dimensions require of monoclinic system and N-CaMnO₃ shows cubic system corresponding with TEM results. The powder size and grain size were obtained mean values of 1-3 µm. The electrical resistivity and Seebeck coefficient were obtained for P-Ca₃Co₄O₉and for N-CaMnO₃ at 360 K.

• Periodical: Advanced Materials Research (Volume 802)
• Pages: 209-212
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.802.209
• Online since: September 2013
• Authors: Supasit Paengson, Tosawat Seetawan, Pennapa Muthitamongkol, Chanchana Thanachayanont
• Keywords: Calcium Cobalt Oxide, Calcium Maganese Oxide, Thermoelectric Cell

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