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Effects of crystal-alignment and grain shape on the thermoelectric properties of Bi0.5Sb1.5Te3 alloys

Title
Effects of crystal-alignment and grain shape on the thermoelectric properties of Bi0.5Sb1.5Te3 alloys
Authors
Je, Koo-ChulKo, BeyungdukKim, ChamKim, HoyoungKim, Dong-Hwan
DGIST Authors
Kim, HoyoungKim, Dong-Hwan
Issue Date
2012-03-15
Citation
Journal of Alloys and Compounds, 517, 75-79
Type
Article
Article Type
Article
Keywords
AlignmentBand Gap EnergyCerium AlloysGrain ShapeGrain ShapesMagnetic FieldsQuantum-ConfinementSpark Plasma SinteringSpark Plasma Sintering MethodStrong Magnetic FieldsThermo-Electric EfficiencyThermo-Electric EquipmentThermo-Electric PropertiesThermo-Electricity
ISSN
0925-8388
Abstract
We investigated the thermoelectric properties of sintered Bi 0.5Sb 1.5Te 3 alloys containing grains for their alignment, sizes and shapes. The figure of merit can be improved as the result of lower resistivity by increasing the alignment, which is realized by using the spark plasma sintering method and a strong magnetic field. In addition, making the grains more spherical can improve the thermoelectric efficiency as a result of carrier quantum confinement and enhancement of the band gap energy. © 2011 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5365
DOI
10.1016/j.jallcom.2011.12.030
Publisher
Elsevier
Related Researcher
Files:
There are no files associated with this item.
Collection:
Magnet-Controlled Materials Research Group1. Journal Articles


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