dc.contributor.author | Kanas, Nikola | |
dc.contributor.author | Singh, Sathya Prakash | |
dc.contributor.author | Rotan, Magnus | |
dc.contributor.author | Desissa, Temesgen Debelo | |
dc.contributor.author | Grande, Tor | |
dc.contributor.author | Wiik, Kjell | |
dc.contributor.author | Norby, Truls Eivind | |
dc.contributor.author | Einarsrud, Mari-Ann | |
dc.date.accessioned | 2019-04-11T06:05:20Z | |
dc.date.available | 2019-04-11T06:05:20Z | |
dc.date.created | 2019-02-17T15:09:32Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Materials. 2019, 12 497-?. | nb_NO |
dc.identifier.issn | 1996-1944 | |
dc.identifier.uri | http://hdl.handle.net/11250/2594110 | |
dc.description.abstract | High-temperature instability of the Ca3Co4−yO9+δ and CaMnO3−δ direct p-n junction causing the formation of Ca3Co2−xMnxO6 has motivated the investigation of the thermoelectric performance of this intermediate phase. Here, the thermoelectric properties comprising Seebeck coefficient, electrical conductivity, and thermal conductivity of Ca3Co2−xMnxO6 with x = 0.05, 0.2, 0.5, 0.75, and 1 are reported. Powders of the materials were synthesized by the solid-state method, followed by conventional sintering. The material Ca3CoMnO6 (x = 1) demonstrated a large positive Seebeck coefficient of 668 μV/K at 900 °C, but very low electrical conductivity. Materials with compositions with x < 1 had lower Seebeck coefficients and higher electrical conductivity, consistent with small polaron hopping with an activation energy for mobility of 44 ± 6 kJ/mol and where both the concentration and mobility of hole charge carriers were proportional to 1−x. The conductivity reached about 11 S·cm−1 at 900 °C for x = 0.05. The material Ca3Co1.8Mn0.2O6 (x = 0.2) yielded a maximum zT of 0.021 at 900 °C. While this value in itself is not high, the thermodynamic stability and self-assembly of Ca3Co2−xMnxO6 layers between Ca3Co4−yO9+δ and CaMnO3−δ open for new geometries and designs of oxide-based thermoelectric generators. | nb_NO |
dc.description.abstract | Thermoelectric Properties of Ca3Co2−xMnxO6 (x = 0.05, 0.2, 0.5, 0.75, and 1) | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | MDPI | nb_NO |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Thermoelectric Properties of Ca3Co2−xMnxO6 (x = 0.05, 0.2, 0.5, 0.75, and 1) | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 497-? | nb_NO |
dc.source.volume | 12 | nb_NO |
dc.source.journal | Materials | nb_NO |
dc.identifier.doi | 10.3390/ma12030497 | |
dc.identifier.cristin | 1678036 | |
dc.relation.project | Norges forskningsråd: 228854 | nb_NO |
dc.description.localcode | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |