Thermoelectric and mechanical properties of Zn 4Sb 3 polycrystals sintered by spark plasma sintering

Min Seok Song, Soon Mok Choi, Won Seon Seo, Jooho Moon, Kyung Wook Jang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

β-Zn 4Sb 3 has attracted much interest as a thermoelectric material because of its potential for power-generation applications in a moderate temperature range (450 ~ 650 K). In general, three kinds of considerations have been reported for the fabrication of a polycrystalline β-Zn 4Sb 3 bulk sample: (i) a problem in chemical stability, (ii) cracks in bulk specimens owing to a phase transition of the Zn 4Sb 3 composition resulting in stress during cooling, and (iii) the requirement for high bulk density. In this study, a pure Zn 4Sb 3 phase with a high define ZT(figure of merit) value was synthesized by using a vacuum melting process and a vacuum annealing process, followed by a spark plasma sintering (SPS) method. Fabricating a single-phase specimen with high bulk density by means of optimizing the SPS conditions (temperature and pressure) was significant for obtaining high performance in the Zn 4Sb 3 thermoelectric system. The maximum ZT value (0.98) was attained at a 573 K measurement temperature for the specimen sintered with the optimized SPS conditions (723 K, 40 MPa).

Original languageEnglish
Pages (from-to)1735-1740
Number of pages6
JournalJournal of the Korean Physical Society
Volume60
Issue number10
DOIs
Publication statusPublished - 2012 May 1

Fingerprint

polycrystals
sparks
sintering
mechanical properties
vacuum melting
thermoelectric materials
figure of merit
temperature measurement
cracks
cooling
requirements
vacuum
fabrication
annealing
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Song, Min Seok ; Choi, Soon Mok ; Seo, Won Seon ; Moon, Jooho ; Jang, Kyung Wook. / Thermoelectric and mechanical properties of Zn 4Sb 3 polycrystals sintered by spark plasma sintering. In: Journal of the Korean Physical Society. 2012 ; Vol. 60, No. 10. pp. 1735-1740.
@article{6377757cb8664fd4a461fa1c05be403b,
title = "Thermoelectric and mechanical properties of Zn 4Sb 3 polycrystals sintered by spark plasma sintering",
abstract = "β-Zn 4Sb 3 has attracted much interest as a thermoelectric material because of its potential for power-generation applications in a moderate temperature range (450 ~ 650 K). In general, three kinds of considerations have been reported for the fabrication of a polycrystalline β-Zn 4Sb 3 bulk sample: (i) a problem in chemical stability, (ii) cracks in bulk specimens owing to a phase transition of the Zn 4Sb 3 composition resulting in stress during cooling, and (iii) the requirement for high bulk density. In this study, a pure Zn 4Sb 3 phase with a high define ZT(figure of merit) value was synthesized by using a vacuum melting process and a vacuum annealing process, followed by a spark plasma sintering (SPS) method. Fabricating a single-phase specimen with high bulk density by means of optimizing the SPS conditions (temperature and pressure) was significant for obtaining high performance in the Zn 4Sb 3 thermoelectric system. The maximum ZT value (0.98) was attained at a 573 K measurement temperature for the specimen sintered with the optimized SPS conditions (723 K, 40 MPa).",
author = "Song, {Min Seok} and Choi, {Soon Mok} and Seo, {Won Seon} and Jooho Moon and Jang, {Kyung Wook}",
year = "2012",
month = "5",
day = "1",
doi = "10.3938/jkps.60.1735",
language = "English",
volume = "60",
pages = "1735--1740",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "10",

}

Thermoelectric and mechanical properties of Zn 4Sb 3 polycrystals sintered by spark plasma sintering. / Song, Min Seok; Choi, Soon Mok; Seo, Won Seon; Moon, Jooho; Jang, Kyung Wook.

In: Journal of the Korean Physical Society, Vol. 60, No. 10, 01.05.2012, p. 1735-1740.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermoelectric and mechanical properties of Zn 4Sb 3 polycrystals sintered by spark plasma sintering

AU - Song, Min Seok

AU - Choi, Soon Mok

AU - Seo, Won Seon

AU - Moon, Jooho

AU - Jang, Kyung Wook

PY - 2012/5/1

Y1 - 2012/5/1

N2 - β-Zn 4Sb 3 has attracted much interest as a thermoelectric material because of its potential for power-generation applications in a moderate temperature range (450 ~ 650 K). In general, three kinds of considerations have been reported for the fabrication of a polycrystalline β-Zn 4Sb 3 bulk sample: (i) a problem in chemical stability, (ii) cracks in bulk specimens owing to a phase transition of the Zn 4Sb 3 composition resulting in stress during cooling, and (iii) the requirement for high bulk density. In this study, a pure Zn 4Sb 3 phase with a high define ZT(figure of merit) value was synthesized by using a vacuum melting process and a vacuum annealing process, followed by a spark plasma sintering (SPS) method. Fabricating a single-phase specimen with high bulk density by means of optimizing the SPS conditions (temperature and pressure) was significant for obtaining high performance in the Zn 4Sb 3 thermoelectric system. The maximum ZT value (0.98) was attained at a 573 K measurement temperature for the specimen sintered with the optimized SPS conditions (723 K, 40 MPa).

AB - β-Zn 4Sb 3 has attracted much interest as a thermoelectric material because of its potential for power-generation applications in a moderate temperature range (450 ~ 650 K). In general, three kinds of considerations have been reported for the fabrication of a polycrystalline β-Zn 4Sb 3 bulk sample: (i) a problem in chemical stability, (ii) cracks in bulk specimens owing to a phase transition of the Zn 4Sb 3 composition resulting in stress during cooling, and (iii) the requirement for high bulk density. In this study, a pure Zn 4Sb 3 phase with a high define ZT(figure of merit) value was synthesized by using a vacuum melting process and a vacuum annealing process, followed by a spark plasma sintering (SPS) method. Fabricating a single-phase specimen with high bulk density by means of optimizing the SPS conditions (temperature and pressure) was significant for obtaining high performance in the Zn 4Sb 3 thermoelectric system. The maximum ZT value (0.98) was attained at a 573 K measurement temperature for the specimen sintered with the optimized SPS conditions (723 K, 40 MPa).

UR - http://www.scopus.com/inward/record.url?scp=84863611549&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863611549&partnerID=8YFLogxK

U2 - 10.3938/jkps.60.1735

DO - 10.3938/jkps.60.1735

M3 - Article

AN - SCOPUS:84863611549

VL - 60

SP - 1735

EP - 1740

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - 10

ER -