dc.contributor.author | Ioannou, Ioanna | |
dc.contributor.author | Delimitis, Andreas | |
dc.contributor.author | Gelbstein, Yaniv | |
dc.contributor.author | Kyratsi, Theodora | |
dc.date.accessioned | 2023-03-16T13:51:43Z | |
dc.date.available | 2023-03-16T13:51:43Z | |
dc.date.created | 2022-10-07T13:04:47Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Ioannou, I., Delimitis, A., Gelbstein, Y., & Kyratsi, T. (2022). Reduction of Hf via Hf/Zr Substitution in Mechanically Alloyed (Hf, Ti) CoSb Half-Heusler Solid Solutions. Inorganics, 10(4), 51. | en_US |
dc.identifier.issn | 2304-6740 | |
dc.identifier.uri | https://hdl.handle.net/11250/3058860 | |
dc.description.abstract | Abstract
(Hf,Zr,Ti)Co(Sb,Sn) Solid solutions were prepared by mechanical-alloying followed by hot-press method as an attempt to reduce Hf concentration and therefore the material’s cost without negatively affecting the thermoelectric performance. To this end, two different methods were applied: (a) Hf substitution with its lighter and cheaper homologue Zr; and (b) fine tuning of carrier concentration by the substitution of Sb with Sn. The isoelectronic substitution of Hf with Zr was investigated in Hf0.6-xZrxTi0.4CoSb0.8Sn0.2 solid solutions and resulted in lower power factors and ZTs. However, the low thermal conductivity of Hf0.4Zr0.2Ti0.4CoSb0.8Sn0.2 contributed in achieving a relatively good ZT~0.67 at 970 K. The effect of charge carrier concentration was investigated by preparing Hf0.4Zr0.2Ti0.4CoSb1-ySny (y = 0.15–0.25) compounds. Hf0.4Zr0.2Ti0.4CoSb0.83Sn0.17 composition prepared by six hours milling reached the highest ZT of 0.77 at 960 K. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | MDPI | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Reduction of Hf via Hf/Zr Substitution in Mechanically Alloyed (Hf,Ti)CoSb Half-Heusler Solid Solutions | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | The authors | en_US |
dc.subject.nsi | VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440 | en_US |
dc.source.pagenumber | 16 | en_US |
dc.source.volume | 10 | en_US |
dc.source.journal | Inorganics | en_US |
dc.source.issue | 4 | en_US |
dc.identifier.doi | 10.3390/inorganics10040051 | |
dc.identifier.cristin | 2059592 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |