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Title: Thermoelectric Properties of Scandium Sesquitelluride
Rare-earth (RE) tellurides have been studied extensively for use in high-temperature thermoelectric applications. Specifically, lanthanum and praseodymium-based compounds with the Th3P4 structure type have demonstrated dimensionless thermoelectric figures of merit (zT) up to 1.7 at 1200 K. Scandium, while not part of the lanthanide series, is considered a RE element due to its chemical similarity. However, little is known about the thermoelectric properties of the tellurides of scandium. Here, we synthesized scandium sesquitelluride (Sc2Te3) using a mechanochemical approach and formed sintered compacts through spark plasma sintering (SPS). Temperature-dependent thermoelectric properties were measured from 300–1100 K. Sc2Te3 exhibited a peak zT = 0.3 over the broad range of 500–750 K due to an appreciable power factor and low-lattice thermal conductivity in the mid-temperature range.  more » « less
Award ID(s):
1709158
PAR ID:
10110347
Author(s) / Creator(s):
; ; ; ; ;
Date Published:
Journal Name:
Materials
Volume:
12
Issue:
5
ISSN:
1996-1944
Page Range / eLocation ID:
734
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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