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High-temperature stability, structure and thermoelectric propertiesof CaMn.sub.1-x./sub.Nb.sub.x./sub.O.sub.3./sub. phases
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SYSNO ASEP 0336243 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High-temperature stability, structure and thermoelectric propertiesof CaMn1-xNbxO3 phases Title Vysokoteplotní stabilita, struktura a termoelektrické vlastnosti fázíCaMn1-xNbxO3. Author(s) Bocher, L. (CH)
Aguirre, M.H. (CH)
Robert, R. (CH)
Logvinovich, D. (CH)
Bakardjieva, Snejana (UACH-T) SAI, RID, ORCID
Hejtmánek, Jiří (FZU-D) RID, ORCID
Weidenkaff, A. (CH)Number of authors 7 Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 57, č. 19 (2009), s. 5667-5680Number of pages 14 s. Language eng - English Country GB - United Kingdom Keywords perovskites ; thermoelectricity ; structural transition ; thermal reduction ; twinned domain microstructure Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA203/09/1036 GA ČR - Czech Science Foundation (CSF) LC523 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100521 - FZU-D (2005-2011) AV0Z40320502 - UACH-T (2005-2011) UT WOS 000271668200005 DOI 10.1016/j.actamat.2009.07.062 Annotation Polycrystalline perovskite-type CaMn1-xNbxO3 phases (with x = 0.02, 0.05, 0.08 and 0.10) were investigated with regard to their structure, microstructure and thermal stability as a function of temperature. A possible mechanism relating the high-temperature structural transition and the thermal reduction process of slightly substituted CaMnO3 phases was proposed. The thermal reduction process resulted in a change in the Mn3+/Mn4+ concentrations in the Mn sublattice, and therefore in a modification of the transport properties. A comprehensive study examined the impact of both phenomena on the electrical and thermal transport properties. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2010
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