Research on Properties of Ca-Co-O Thermoelectric Material with Adding Sm

Abstract:

Ca₃Co₄O₉ and Ca_3-xSm_xCo₄O9 powders were prepared by sol-gel process. The Ca-Co-O thermoelectric material ceramics were prepared. The ceramics materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The microstructure and thermoelectric properties of ceramics were researched. The results indicate that the crystal of Ca_3-xSm_xCo₄O₉ with Sm adding growth ideally, the material had high density and low pore rate. The Ca_3-xSm_xCo₄O₉ ceramics contain directional array plate-shaped grains with layered structure. The thermoelectric properties of Ca_3-xSm_xCo₄O ceramics were excellent. There were high Seebeck coefficient and high electrical conductivity for Ca_3-xSm_xCo₄O₉ ceramics. The power factor increased with temperature increasing.

• Periodical: Materials Science Forum (Volume 688)
• Pages: 260-265
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.688.260
• Online since: June 2011
• Authors: Jie Chen Mu, Xiu Ting Wei, Li Peng Zhang
• Keywords: Ca₃-_XSm_XCo₄O₉, Microstructure, Sol-Gel (SG), Thermoelectric Property

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