Low-temperature thermoelectric characteristics of Ca32xYbxCo3.95Ga0.05O9+d (0 < x < 0.10)

Category: Transient Plane Source

Author(s): Ankam Bhaskar, Chia-Jyi Liu, Y.-C. Huang

Keywords: electrical resistance, iodometric titration, thermal conductivity, thermoelectric materials, thermopower, transient plane source technique, x-ray diffraction, x-ray diffraction (xrd), xrd

Abstract: The thermoelectric properties of Ca3-x­­YbxCo3.95Ga0.05O9+delta where x = 0.00, 0.02, 0.05, and 0.10 were determined at temperatures less than 300 K. It was determined that the partial substitution of Yb3+ for Ca2+ resulted in an increase in resistivity and thermopower. The thermal conductivity was found to decrease with increasing Yb3+ content, and the sample producing the highest thermoelectric figure of merit at 300 K was the x = 0.05 sample.

Reference: Journal of Materials Science: Materials in Electronics, 25 (2014) 249-254

DOI: 10.1007/s10854-013-1579-2

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