Inhomogeneity in thermoelectrics caused by Peltier effect-induced temperature gradient during spark plasma sintering

Yeongseok Kim; Cheolmin Shin; Taesung Kim; Sang Woo Kang

doi:10.1016/j.scriptamat.2018.08.024

Inhomogeneity in thermoelectrics caused by Peltier effect-induced temperature gradient during spark plasma sintering

Yeongseok Kim
, Cheolmin Shin
, Taesung Kim
, Sang Woo Kang

Department of Mechanical Engineering

Sungkyunkwan University
Korea Research Institute of Standards and Science
University of Science and Technology UST

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

8 Scopus citations

Abstract

This study investigated the reasons for inhomogeneity in the axial direction during spark plasma sintering (SPS) of a thermoelectric material. Bismuth antimony telluride, a p-type thermoelectric material, was sintered using high current (>200 A). X-ray diffraction and power factor analyses confirmed that the preferred orientation improved with increasing sintering temperature, and the power factor increased linearly with temperature. The temperature gradient from 700 to 725 K at 723 K sintering process, estimated from this unique correlation between sintering temperature and power factor, was five-fold that of the reported values. This extraordinary temperature gradient was presumably generated by the Peltier effect.

Original language	English
Pages (from-to)	46-49
Number of pages	4
Journal	Scripta Materialia
Volume	158
DOIs	https://doi.org/10.1016/j.scriptamat.2018.08.024
State	Published - 1 Jan 2019

Keywords

Peltier effect
Spark plasma sintering
Thermoelectric material
X-ray diffraction (XRD)

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10.1016/j.scriptamat.2018.08.024

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title = "Inhomogeneity in thermoelectrics caused by Peltier effect-induced temperature gradient during spark plasma sintering",

abstract = "This study investigated the reasons for inhomogeneity in the axial direction during spark plasma sintering (SPS) of a thermoelectric material. Bismuth antimony telluride, a p-type thermoelectric material, was sintered using high current (>200 A). X-ray diffraction and power factor analyses confirmed that the preferred orientation improved with increasing sintering temperature, and the power factor increased linearly with temperature. The temperature gradient from 700 to 725 K at 723 K sintering process, estimated from this unique correlation between sintering temperature and power factor, was five-fold that of the reported values. This extraordinary temperature gradient was presumably generated by the Peltier effect.",

keywords = "Peltier effect, Spark plasma sintering, Thermoelectric material, X-ray diffraction (XRD)",

author = "Yeongseok Kim and Cheolmin Shin and Taesung Kim and Kang, \{Sang Woo\}",

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T1 - Inhomogeneity in thermoelectrics caused by Peltier effect-induced temperature gradient during spark plasma sintering

AU - Kim, Yeongseok

AU - Shin, Cheolmin

AU - Kim, Taesung

AU - Kang, Sang Woo

PY - 2019/1/1

Y1 - 2019/1/1

N2 - This study investigated the reasons for inhomogeneity in the axial direction during spark plasma sintering (SPS) of a thermoelectric material. Bismuth antimony telluride, a p-type thermoelectric material, was sintered using high current (>200 A). X-ray diffraction and power factor analyses confirmed that the preferred orientation improved with increasing sintering temperature, and the power factor increased linearly with temperature. The temperature gradient from 700 to 725 K at 723 K sintering process, estimated from this unique correlation between sintering temperature and power factor, was five-fold that of the reported values. This extraordinary temperature gradient was presumably generated by the Peltier effect.

AB - This study investigated the reasons for inhomogeneity in the axial direction during spark plasma sintering (SPS) of a thermoelectric material. Bismuth antimony telluride, a p-type thermoelectric material, was sintered using high current (>200 A). X-ray diffraction and power factor analyses confirmed that the preferred orientation improved with increasing sintering temperature, and the power factor increased linearly with temperature. The temperature gradient from 700 to 725 K at 723 K sintering process, estimated from this unique correlation between sintering temperature and power factor, was five-fold that of the reported values. This extraordinary temperature gradient was presumably generated by the Peltier effect.

KW - Peltier effect

KW - Spark plasma sintering

KW - Thermoelectric material

KW - X-ray diffraction (XRD)

UR - https://www.scopus.com/pages/publications/85052487678

U2 - 10.1016/j.scriptamat.2018.08.024

DO - 10.1016/j.scriptamat.2018.08.024

M3 - Article

AN - SCOPUS:85052487678

SN - 1359-6462

VL - 158

SP - 46

EP - 49

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Inhomogeneity in thermoelectrics caused by Peltier effect-induced temperature gradient during spark plasma sintering

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Keywords

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