Journal
MATERIALS LETTERS
Volume 233, Issue -, Pages 166-169Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.08.157
Keywords
Ti-filled skutterudite; Microwave synthesis; Microstructure; Electrical properties; Thermal properties
Funding
- National Natural Science Foundation of China [51574134, 51574042]
- Shenyang National Laboratory for Materials Science [18LHPY016]
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals [18LHPY016]
- Anhui university outstanding young talent support program [gxyqZD2017039]
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In the present wok, a series of Ti-filled and Te-doped skutterudite compounds TixCo4Sb11.5Te0.5 (x = 0.2, 0.3, 0.5) were successful fabricated by combination of microwave synthesis and spark plasma sintering technique. The microstructure and thermoelectric properties of TixCo4Sb11.5Te0.5 bulks have been investigated systematically. The experimental results show that nearly single phase skutterudite were obtained by 5 min microwave synthesis. The Ti0.3Co4Sb11.5Te0.5 bulk has smallest and uniform grain size of about 2 mu m. The influences of Ti concentration on thermoelectric properties were discussed. A highest ZT of 0.60 for Ti0.3Co4Sb11.5Te0.5 was achieved at 773 K along with a total thermal conductivity of 3.72Wm(-1) K-1, one might obtain higher values at a higher temperature. (C) 2018 Elsevier B.V. All rights reserved.
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