naa a22 4500 510803393 CHVBK 20180411092758.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11664-013-2752-3 doi (NATIONALLICENCE)springer-10.1007/s11664-013-2752-3 Thermoelectric Properties of Ca3− x Dy x Co3.95Ga0.05O9+ δ [Elektronische Daten] [Ankam Bhaskar, C.-S. Jhang, Chia-Jyi Liu] Ca3Co4O9+δ and Ca3−x Dy x Co3.95Ga0.05O9+δ (x = 0.05, 0.10) samples were prepared by conventional solid-state synthesis, and their thermoelectric properties measured at 25 K to 300 K. The x-ray diffraction patterns revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. The highest power factor among all the samples (2.45 μW cm−1 K−2 at 132 K) was obtained for Ca2.9Dy0.1Co3.95Ga0.05O9+δ , being about 80% higher than that of the undoped sample. Ca2.9Dy0.1Co3.95 Ga0.05O9+δ had the highest dimensionless figure of merit of 0.033 at 300 K, representing an improvement of about 74% compared with undoped Ca3Co4O9+δ . TMS, 2013 Thermoelectric materials nationallicence sintering nationallicence thermoelectric nationallicence thermal conductivity nationallicence x-ray diffraction nationallicence figure of merit nationallicence Bhaskar Ankam Department of Physics, National Changhua University of Education, 500, Changhua, Taiwan aut Jhang C.-S Department of Physics, National Changhua University of Education, 500, Changhua, Taiwan aut Liu Chia-Jyi Department of Physics, National Changhua University of Education, 500, Changhua, Taiwan aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/12(2013-12-01), 3541-3546 0361-5235 42:12<3541 2013 42 11664 https://doi.org/10.1007/s11664-013-2752-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-013-2752-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bhaskar Ankam Department of Physics, National Changhua University of Education, 500, Changhua, Taiwan aut NATIONALLICENCE 700 1- Jhang C.-S Department of Physics, National Changhua University of Education, 500, Changhua, Taiwan aut NATIONALLICENCE 700 1- Liu Chia-Jyi Department of Physics, National Changhua University of Education, 500, Changhua, Taiwan aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/12(2013-12-01), 3541-3546 0361-5235 42:12<3541 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 510803393 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer