Fabrication and thermoelectric properties of crystal-aligned nano-structured Bi2Te3

Dong Hwan Kim; Cham Kim; Dong Woo Ha; Hoyoung Kim

doi:10.1016/j.jallcom.2011.02.059

Fabrication and thermoelectric properties of crystal-aligned nano-structured Bi₂Te₃

Dong Hwan Kim, Cham Kim, Dong Woo Ha, Hoyoung Kim

Division of Nanotechnology

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

With a view to experimental demonstration for an improved thermoelectric performance, a slip casting method under high magnetic field for uni-directionally aligned crystals has been investigated. The sintered body of Bi₂Te₃ powder, its size between 300 and 500 nm, green-bodied under 6 T magnetic field showed a 33% variation in the fraction of the directionally aligned crystals. According to increasing this fraction, electrical resistivity was reduced with keeping thermal conductivity and Seebeck coefficient unchanged. This could be explained from the fact that the aligned crystals by magnetic field has increased the carrier mobility keeping carrier concentration unchanged.

Original language	English
Pages (from-to)	5211-5215
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	17
DOIs	https://doi.org/10.1016/j.jallcom.2011.02.059
State	Published - 28 Apr 2011

Bibliographical note

Funding Information:
This work was supported by the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy , Republic of Korea (No. 2007EID11P050000 ).

Keywords

Crystal alignment
High magnetic field
Nanostructure
Spark plasma sintering
Thermoelectric

Access to Document

10.1016/j.jallcom.2011.02.059

Cite this

@article{a90201109f014bffbc000308c4850c3c,

title = "Fabrication and thermoelectric properties of crystal-aligned nano-structured Bi2Te3",

abstract = "With a view to experimental demonstration for an improved thermoelectric performance, a slip casting method under high magnetic field for uni-directionally aligned crystals has been investigated. The sintered body of Bi2Te3 powder, its size between 300 and 500 nm, green-bodied under 6 T magnetic field showed a 33% variation in the fraction of the directionally aligned crystals. According to increasing this fraction, electrical resistivity was reduced with keeping thermal conductivity and Seebeck coefficient unchanged. This could be explained from the fact that the aligned crystals by magnetic field has increased the carrier mobility keeping carrier concentration unchanged.",

keywords = "Crystal alignment, High magnetic field, Nanostructure, Spark plasma sintering, Thermoelectric",

author = "Kim, {Dong Hwan} and Cham Kim and Ha, {Dong Woo} and Hoyoung Kim",

note = "Funding Information: This work was supported by the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy , Republic of Korea (No. 2007EID11P050000 ).",

year = "2011",

month = apr,

day = "28",

doi = "10.1016/j.jallcom.2011.02.059",

language = "English",

volume = "509",

pages = "5211--5215",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "17",

}

TY - JOUR

T1 - Fabrication and thermoelectric properties of crystal-aligned nano-structured Bi2Te3

AU - Kim, Dong Hwan

AU - Kim, Cham

AU - Ha, Dong Woo

AU - Kim, Hoyoung

N1 - Funding Information: This work was supported by the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy , Republic of Korea (No. 2007EID11P050000 ).

PY - 2011/4/28

Y1 - 2011/4/28

N2 - With a view to experimental demonstration for an improved thermoelectric performance, a slip casting method under high magnetic field for uni-directionally aligned crystals has been investigated. The sintered body of Bi2Te3 powder, its size between 300 and 500 nm, green-bodied under 6 T magnetic field showed a 33% variation in the fraction of the directionally aligned crystals. According to increasing this fraction, electrical resistivity was reduced with keeping thermal conductivity and Seebeck coefficient unchanged. This could be explained from the fact that the aligned crystals by magnetic field has increased the carrier mobility keeping carrier concentration unchanged.

AB - With a view to experimental demonstration for an improved thermoelectric performance, a slip casting method under high magnetic field for uni-directionally aligned crystals has been investigated. The sintered body of Bi2Te3 powder, its size between 300 and 500 nm, green-bodied under 6 T magnetic field showed a 33% variation in the fraction of the directionally aligned crystals. According to increasing this fraction, electrical resistivity was reduced with keeping thermal conductivity and Seebeck coefficient unchanged. This could be explained from the fact that the aligned crystals by magnetic field has increased the carrier mobility keeping carrier concentration unchanged.

KW - Crystal alignment

KW - High magnetic field

KW - Nanostructure

KW - Spark plasma sintering

KW - Thermoelectric

UR - http://www.scopus.com/inward/record.url?scp=79953175241&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2011.02.059

DO - 10.1016/j.jallcom.2011.02.059

M3 - Article

AN - SCOPUS:79953175241

SN - 0925-8388

VL - 509

SP - 5211

EP - 5215

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 17

ER -