dc.date.accessioned | 2019-04-13T10:19:04Z | |
dc.date.available | 2019-04-13T10:19:04Z | |
dc.date.created | 2019-02-17T15:09:32Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Kanas, Nikola Singh, Sathya Prakash Rotan, Magnus Desissa, Temesgen Debelo Grande, Tor Wiik, Kjell Norby, Truls Eivind Einarsrud, Mari-Ann . Thermoelectric Properties of Ca3Co2−xMnxO6 (x = 0.05, 0.2, 0.5, 0.75, and 1). Materials. 2019, 12, 497 | |
dc.identifier.uri | http://hdl.handle.net/10852/67670 | |
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. | en_US |
dc.language | EN | |
dc.publisher | MDPI AG | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Thermoelectric Properties of Ca3Co2−xMnxO6 (x = 0.05, 0.2, 0.5, 0.75, and 1) | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Kanas, Nikola | |
dc.creator.author | Singh, Sathya Prakash | |
dc.creator.author | Rotan, Magnus | |
dc.creator.author | Desissa, Temesgen Debelo | |
dc.creator.author | Grande, Tor | |
dc.creator.author | Wiik, Kjell | |
dc.creator.author | Norby, Truls Eivind | |
dc.creator.author | Einarsrud, Mari-Ann | |
cristin.unitcode | 185,0,0,0 | |
cristin.unitname | Universitetet i Oslo | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1678036 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Materials&rft.volume=12&rft.spage=497&rft.date=2019 | |
dc.identifier.jtitle | Materials | |
dc.identifier.volume | 12 | |
dc.identifier.startpage | 497 | |
dc.identifier.urn | URN:NBN:no-70844 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1996-1944 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/67670/2/materials-12-00497.pdf | |
dc.type.version | PublishedVersion | |
dc.relation.project | NFR/228854 | |