Thermoelectric properties of Fe and Al double substituted MnSiy (y ~ 1.73)
| hal.structure.identifier | Institute of Chemical Sciences and Centre for Advanced Energy Storage and Recovery | |
| dc.contributor.author | BARCZAK, Barczak A. | |
| hal.structure.identifier | Institute of Chemical Sciences and Centre for Advanced Energy Storage and Recovery | |
| dc.contributor.author | DOWNIE, Ruth A. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Institute of Chemical Sciences and Centre for Advanced Energy Storage and Recovery | |
| dc.contributor.author | POPURI, Srinivasa Rao | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DECOURT, Rodolphe | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | POLLET, Michaël | |
| hal.structure.identifier | Institute of Chemical Sciences and Centre for Advanced Energy Storage and Recovery | |
| dc.contributor.author | BOS, Jan-Willem | |
| dc.date.issued | 2015 | |
| dc.identifier.issn | 0022-4596 | |
| dc.description.abstractEn | Two series of Fe and Al double substituted MnSiγ chimney ladders with a nominal valence electron count, VEC=14 per transition metal were prepared (γ=1.75). Simultaneous replacement of Mn with Fe and Si with Al yielded the Mn1−xFexSi1.75−xAlx series while the second Mn1−xFexSi1.75–1.75xAl2x series follows the pseudo-binary between MnSi1.75 and FeAl2. Scanning electron microscopy and elemental mapping revealed that ~60% of the nominal Al content ends up in the product with the remainder lost to sublimation, and that up to 7% Al can be substituted in the main group sublattice. Profile analysis of X-ray powder diffraction data revealed gradual changes in the cell metrics, consistent with the simultaneous substitution of Fe and Al in a fixed ratio. All samples are p-type with VEC≈13.95 from the structural data and ~1×1021 holes cm−3 from variable temperature Seebeck measurements. The substituted samples have lower electrical resistivities (ρ300 K=2–5 mΩ cm) due to an improved microstructure. This leads to increased thermoelectric power factors (largest S2/ρ=1.95 mW m−1 K−2) compared to MnSiγ. The thermal conductivity for the Mn0.95Fe0.05Si1.66Al0.1 sample is 2.7 W m−1 K−1 between 300 and 800 K, and is comparable to literature data for the parent material. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Nowotny chimney ladder phase | |
| dc.subject.en | Higher manganese silicide | |
| dc.subject.en | Thermoelectric energy conversion | |
| dc.title.en | Thermoelectric properties of Fe and Al double substituted MnSiy (y ~ 1.73) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jssc.2015.03.017 | |
| dc.subject.hal | Chimie/Matériaux | |
| dc.subject.hal | Chimie/Chimie inorganique | |
| bordeaux.journal | Journal of Solid State Chemistry | |
| bordeaux.page | 56-59 | |
| bordeaux.volume | 227 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01145553 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01145553v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Solid%20State%20Chemistry&rft.date=2015&rft.volume=227&rft.spage=56-59&rft.epage=56-59&rft.eissn=0022-4596&rft.issn=0022-4596&rft.au=BARCZAK,%20Barczak%20A.&DOWNIE,%20Ruth%20A.&POPURI,%20Srinivasa%20Rao&DECOURT,%20Rodolphe&POLLET,%20Micha%C3%ABl&rft.genre=article |
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