Rapid preparations and thermoelectric properties of bulk skutterudites with in situ nanostructures

In this paper, Ge and Te co-doped skutterudites Co4Sb11Ge1-xTex were synthesized via two rapid preparation methods, melt quenching-spark plasma sintering (MQ-SPS) and high pressure-spark plasma sintering (HP-SPS). Bulk skutterudites can be synthesized in as little as 6 hours by MQ-SPS and under 1 ho...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:AIP advances 2018-08, Vol.8 (8), p.085201-085201-7
Hauptverfasser: Yu, Yue, Duan, Bo, Bai, Guanghui, Li, Jialiang, E, Libo, Li, Fang, Chen, Gang, Zhai, Pengcheng
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:In this paper, Ge and Te co-doped skutterudites Co4Sb11Ge1-xTex were synthesized via two rapid preparation methods, melt quenching-spark plasma sintering (MQ-SPS) and high pressure-spark plasma sintering (HP-SPS). Bulk skutterudites can be synthesized in as little as 6 hours by MQ-SPS and under 1 hour by HP-SPS, as shown by both scanning electron microscopy and x-ray diffraction. This is a dramatic improvement over traditional methods requiring a full week of processing. The Seebeck coefficient, electrical conductivity and thermal conductivity across a temperature range of 300 to 800 K where measured. This work shows that the processing by HP-SPS significantly decreases thermal and lattice thermal conductivities, while increasing the temperature-dependent Seebeck maximum. Consequently, the HP-Co4Sb11Ge1-xTex samples show a higher dimensionless figure of merit compared with that of MQ-Co4Sb11Ge1-xTex samples throughout the measured temperature range.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.5046647