Thermoelectric properties of Ni0. 05Mo3Sb5. 4Te1. 6 composites with NiSb nanocoating
Article
Article Title | Thermoelectric properties of Ni0. 05Mo3Sb5. 4Te1. 6 composites with NiSb nanocoating |
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ERA Journal ID | 200127 |
Article Category | Article |
Authors | Nandihalli, Nandihalli, Robert, Liang, Wijethunge, Dimuthu, Zhou, Norman and Kleinke, Holger |
Journal Title | AIP Advances |
Journal Citation | 8 |
Article Number | 125304 |
Number of Pages | 12 |
Year | 2018 |
Publisher | AIP Publishing |
Place of Publication | United States |
ISSN | 2158-3226 |
Digital Object Identifier (DOI) | https://doi.org/10.1063/1.5038675 |
Web Address (URL) | https://pubs.aip.org/aip/adv/article/8/12/125304/127142 |
Abstract | NiSb nanoparticles by 0.034, 0.074 and 0.16 volume fractions were successfully coated on bulk polycrystalline Ni0.05Mo3Sb5.4Te1.6 thermoelectric (TE) particles through a solvothermal route without deteriorating the bulk Ni0.05Mo3Sb5.4Te1.6 material. The samples were consolidated through hot pressing and their thermoelectric (TE) properties were characterized. At 400 K, 500 K, and 600 K, 0.074 NiSb sample exhibited 22%, 16% and 11.3% increases in the power factor (P.F.) compared to bulk material. The main contributing factor to this enhanced power factor is the elevated electrical conductivity. For the same sample, the reciprocal relationship between Seebeck coefficient and electrical conductivity is decoupled. Sample 0.16 NiSb exhibited the highest electrical conductivity among the three samples. The thermal conductivity of the 0.16 sample was less temperature sensitive compared to other samples. HRTEM and SEM tools were applied to comprehend microstructural features and their relationship to TE transport properties. Pore effect on the thermal and electrical conductivity was elucidated. This study shows that grain-boundary manipulation via this wet chemistry technique is indeed an economically viable method to fabricate and optimize the transport properties of bulk TE materials. |
Keywords | Chemical synthesis; Interfaces; Thermoelectric effects; Nanoparticle; Wet chemistry; Composite materials ; Transport properties; Phonons; Electrical conductivity; Thermal conductivity |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401607. Metals and alloy materials |
Byline Affiliations | University of Waterloo, Canada |
University of Moratuwa, Sri Lanka | |
School of Engineering |
https://research.usq.edu.au/item/z7653/thermoelectric-properties-of-ni0-05mo3sb5-4te1-6-composites-with-nisb-nanocoating
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