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Improved thermoelectric characteristics of Si-doped misfit-layered cobaltite
- 1.0366985 - FZÚ 2012 RIV US eng J - Journal Article
Liu, Ch.-J. - Huang, Y.-Ch. - Nong, N.V. - Liu, Y.-L. - Petříček, Václav
Improved thermoelectric characteristics of Si-doped misfit-layered cobaltite.
Journal of Electronic Materials. Roč. 40, č. 5 (2011), 1042-1045. ISSN 0361-5235. E-ISSN 1543-186X
Grant - others:AV ČR(CZ) AP0701
Program: Akademická prémie - Praemium Academiae
Institutional research plan: CEZ:AV0Z10100521
Keywords : thermoelectrics * cobaltite * power factor
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.466, year: 2011
The cobaltite Ca3Co4O9+δ has shown large thermopower and is considered to be a good candidate for use as a thermoelectric material. In this paper, we report measurements of the electrical resistivity and Seebeck coefficient for a series of misfit-layered oxides Ca3Co4-xSixO9+δ prepared by solid-state reaction. Structural parameters are refined with the superspace group X2/m(0b0)s0 using powder x-ray diffraction data. With partial substitution of Si4+ for Co3+, the resistivity decreases, while the thermopower increases simultaneously. These results indicate that partial substitution of Si4+ improves the thermoelectric characteristics of Ca3Co4O9+δ.
Permanent Link: http://hdl.handle.net/11104/0006654
Number of the records: 1