High Pressure Synthesis of p-Type Ce(y)Fe(4−x)Co(x)Sb(12) Skutterudites

Co-substituted p-Type CeFe(4−x)Co(x)Sb(12) skutterudites were successfully synthesized with a high pressure synthesis method. The structure, composition, and thermoelectric properties were investigated. The obtained Ce(y)Fe(4−x)Co(x)Sb(12) samples show the skutterudite structure of [Formula: see tex...

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Detalles Bibliográficos
Autores principales: Liu, Yadi, Li, Xiaohui, Zhang, Qian, Zhang, Long, Yu, Dongli, Xu, Bo, Tian, Yongjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502921/
https://www.ncbi.nlm.nih.gov/pubmed/28773381
http://dx.doi.org/10.3390/ma9040257
Descripción
Sumario:Co-substituted p-Type CeFe(4−x)Co(x)Sb(12) skutterudites were successfully synthesized with a high pressure synthesis method. The structure, composition, and thermoelectric properties were investigated. The obtained Ce(y)Fe(4−x)Co(x)Sb(12) samples show the skutterudite structure of [Formula: see text] symmetry. The hole concentration decreases with elevating Co substitution level, leading to increased Seebeck coefficient and electrical resistivity. Meanwhile, the filling fraction of Ce decreases, which is unfavorable for reducing the lattice thermal conductivity. As a result, the thermoelectric performance of Ce(y)Fe(4−x)Co(x)Sb(12) deteriorates with higher Co content. The maximal ZT of 0.91 was achieved at 763 K for the optimal Ce(0.92)Fe(4)Sb(12) sample.

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