Thermoelectric properties of Sr0.61Ba0.39Nb2O6-{\delta} ceramics annealed in different oxygen-reduction conditions

Autor:	Li, Y., Liu, J., Wang, C. L., Su, W. B., Zhu, Y. H., Li, J. C., Mei, L. M.
Rok vydání:	2014
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1088/1674-1056/24/4/047201
Popis:	The thermoelectric properties of Sr0.61Ba0.39Nb2O6 ceramics, reduced in different conditions, were investigated in the temperature region from 323 K to 1073 K. The electrical transport behaviors of the samples are dominated by the thermal-activated polaron hopping, the Fermi glass behavior, and the Anderson localized behavior from low temperatures to high temperatures, respectively. The lattice thermal conductivity presents a plateau at high temperatures, indicating a glass-like thermal conduction behavior. Both the thermoelectric power factor and the thermal conductivity increase with the increasing degree of oxygen-reduction. Taking these two factors into account, the oxygen-reduction can still contribute to promoting the thermoelectric figure of merit. The highest ZT value (~0.19 at 1073 K) is obtained in the heaviest oxygen reduced sample. Comment: 17 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1404.0428 Zobrazit plný text záznamu View this record from Arxiv