Effects of Synthesis and Spark Plasma Sintering Conditions on the Thermoelectric Properties of Ca3Co4O9+δ

NingYu Wu; Tim Holgate; Ngo Van Nong; Nini Pryds; Søren Linderoth

doi:10.1007/s11664-013-2546-7

Effects of Synthesis and Spark Plasma Sintering Conditions on the Thermoelectric Properties of Ca₃Co₄O_9+δ

NingYu Wu, Tim Holgate, Ngo Van Nong, Nini Pryds, Søren Linderoth

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Ca3Co4O9+δ samples were synthesized by solid-state (SS) and sol–gel (SG) reactions, followed by spark plasma sintering under different processing conditions. The synthesis process was optimized and the resulting materials characterized with respect to their microstructure, bulk density, and thermoelectric transport properties. High power factors of about 400 μW/m·K2 and 465 μW/m·K2 (at 800°C) were measured for SS and SG samples, respectively. The improved thermoelectric performance of the SG sample is believed to originate from the smaller particle sizes and better grain alignment. The SG method is suggested to be a beneficial means of obtaining high-performance thermoelectric materials of Ca3Co4O9+δ type.

Original language	English
Journal	Journal of Electronic Materials
Volume	42
Issue number	7
Pages (from-to)	2134-2142
ISSN	0361-5235
DOIs	https://doi.org/10.1007/s11664-013-2546-7
Publication status	Published - 2013

Keywords

Thermoelectric
Spark plasma sintering
Ca3Co4O9+d
Solid-state reaction
Sol–gel reaction

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title = "Effects of Synthesis and Spark Plasma Sintering Conditions on the Thermoelectric Properties of Ca3Co4O9+δ",

abstract = "Ca3Co4O9+δ samples were synthesized by solid-state (SS) and sol–gel (SG) reactions, followed by spark plasma sintering under different processing conditions. The synthesis process was optimized and the resulting materials characterized with respect to their microstructure, bulk density, and thermoelectric transport properties. High power factors of about 400 μW/m·K2 and 465 μW/m·K2 (at 800°C) were measured for SS and SG samples, respectively. The improved thermoelectric performance of the SG sample is believed to originate from the smaller particle sizes and better grain alignment. The SG method is suggested to be a beneficial means of obtaining high-performance thermoelectric materials of Ca3Co4O9+δ type.",

keywords = "Thermoelectric, Spark plasma sintering, Ca3Co4O9+d, Solid-state reaction, Sol–gel reaction",

author = "NingYu Wu and Tim Holgate and {Van Nong}, Ngo and Nini Pryds and S{\o}ren Linderoth",

year = "2013",

doi = "10.1007/s11664-013-2546-7",

language = "English",

volume = "42",

pages = "2134--2142",

journal = "Journal of Electronic Materials",

issn = "0361-5235",

publisher = "Springer New York",

number = "7",

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TY - JOUR

T1 - Effects of Synthesis and Spark Plasma Sintering Conditions on the Thermoelectric Properties of Ca3Co4O9+δ

AU - Wu, NingYu

AU - Holgate, Tim

AU - Van Nong, Ngo

AU - Pryds, Nini

AU - Linderoth, Søren

PY - 2013

Y1 - 2013

N2 - Ca3Co4O9+δ samples were synthesized by solid-state (SS) and sol–gel (SG) reactions, followed by spark plasma sintering under different processing conditions. The synthesis process was optimized and the resulting materials characterized with respect to their microstructure, bulk density, and thermoelectric transport properties. High power factors of about 400 μW/m·K2 and 465 μW/m·K2 (at 800°C) were measured for SS and SG samples, respectively. The improved thermoelectric performance of the SG sample is believed to originate from the smaller particle sizes and better grain alignment. The SG method is suggested to be a beneficial means of obtaining high-performance thermoelectric materials of Ca3Co4O9+δ type.

AB - Ca3Co4O9+δ samples were synthesized by solid-state (SS) and sol–gel (SG) reactions, followed by spark plasma sintering under different processing conditions. The synthesis process was optimized and the resulting materials characterized with respect to their microstructure, bulk density, and thermoelectric transport properties. High power factors of about 400 μW/m·K2 and 465 μW/m·K2 (at 800°C) were measured for SS and SG samples, respectively. The improved thermoelectric performance of the SG sample is believed to originate from the smaller particle sizes and better grain alignment. The SG method is suggested to be a beneficial means of obtaining high-performance thermoelectric materials of Ca3Co4O9+δ type.

KW - Thermoelectric

KW - Spark plasma sintering

KW - Ca3Co4O9+d

KW - Solid-state reaction

KW - Sol–gel reaction

U2 - 10.1007/s11664-013-2546-7

DO - 10.1007/s11664-013-2546-7

M3 - Journal article

VL - 42

SP - 2134

EP - 2142

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

SN - 0361-5235

IS - 7

ER -