Thermoelectric properties of La3+ and Ce3+ co-doped CaMnO3 prepared by tape casting

C. M. Kim; D. H. Kim; H. Y. Hong; K. Park

doi:10.1016/j.jeurceramsoc.2019.08.021

Thermoelectric properties of La³⁺ and Ce³⁺ co-doped CaMnO₃ prepared by tape casting

C. M. Kim, D. H. Kim, H. Y. Hong, K. Park

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

22 Citations (Scopus)

Abstract

The structural and thermoelectric transport properties of Ca_0.9La_0.1– _xCe_xMnO_3– _δ (x = 0 – 0.1) prepared through tape casting process were investigated. The thermoelectric transport properties of CaMnO₃ were optimized by the La³⁺ and Ce³⁺ co-doping and tape casting process. The Ce³⁺ substitution substantially enhanced the dimensionless figure-of-merit (ZT) due to the increases in electrical conductivity and absolute Seebeck coefficient. Of the studied samples, Ca_0.9La_0.025Ce_0.075MnO_3– _δ had the maximum ZT (0.17) at 800 °C, and this value was 42% and 70% larger than those of singly doped Ca_0.9La_0.1MnO_3– _δ (0.12) and Ca_0.9Ce_0.1MnO_3– _δ (0.10), respectively. We demonstrate that both the La³⁺ and Ce³⁺ co-doping and tape casting process are highly promising approaches in enhancing the high-temperature thermoelectric transport properties of CaMnO₃.

Original language	English
Pages (from-to)	735-741
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	40
Issue number	3
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2019.08.021
Publication status	Published - 2020 Mar
Externally published	Yes

Keywords

Electrical conductivity
Microstructure
Sintering
Thermoelectric properties

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2019.08.021

Cite this

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title = "Thermoelectric properties of La3+ and Ce3+ co-doped CaMnO3 prepared by tape casting",

abstract = "The structural and thermoelectric transport properties of Ca0.9La0.1– xCexMnO3– δ (x = 0 – 0.1) prepared through tape casting process were investigated. The thermoelectric transport properties of CaMnO3 were optimized by the La3+ and Ce3+ co-doping and tape casting process. The Ce3+ substitution substantially enhanced the dimensionless figure-of-merit (ZT) due to the increases in electrical conductivity and absolute Seebeck coefficient. Of the studied samples, Ca0.9La0.025Ce0.075MnO3– δ had the maximum ZT (0.17) at 800 °C, and this value was 42% and 70% larger than those of singly doped Ca0.9La0.1MnO3– δ (0.12) and Ca0.9Ce0.1MnO3– δ (0.10), respectively. We demonstrate that both the La3+ and Ce3+ co-doping and tape casting process are highly promising approaches in enhancing the high-temperature thermoelectric transport properties of CaMnO3.",

keywords = "Electrical conductivity, Microstructure, Sintering, Thermoelectric properties",

author = "Kim, {C. M.} and Kim, {D. H.} and Hong, {H. Y.} and K. Park",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2017R1D1A1B03031196 ). Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = mar,

doi = "10.1016/j.jeurceramsoc.2019.08.021",

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AU - Kim, C. M.

AU - Kim, D. H.

AU - Hong, H. Y.

AU - Park, K.

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2017R1D1A1B03031196 ). Publisher Copyright: © 2019 Elsevier Ltd

PY - 2020/3

Y1 - 2020/3

N2 - The structural and thermoelectric transport properties of Ca0.9La0.1– xCexMnO3– δ (x = 0 – 0.1) prepared through tape casting process were investigated. The thermoelectric transport properties of CaMnO3 were optimized by the La3+ and Ce3+ co-doping and tape casting process. The Ce3+ substitution substantially enhanced the dimensionless figure-of-merit (ZT) due to the increases in electrical conductivity and absolute Seebeck coefficient. Of the studied samples, Ca0.9La0.025Ce0.075MnO3– δ had the maximum ZT (0.17) at 800 °C, and this value was 42% and 70% larger than those of singly doped Ca0.9La0.1MnO3– δ (0.12) and Ca0.9Ce0.1MnO3– δ (0.10), respectively. We demonstrate that both the La3+ and Ce3+ co-doping and tape casting process are highly promising approaches in enhancing the high-temperature thermoelectric transport properties of CaMnO3.

AB - The structural and thermoelectric transport properties of Ca0.9La0.1– xCexMnO3– δ (x = 0 – 0.1) prepared through tape casting process were investigated. The thermoelectric transport properties of CaMnO3 were optimized by the La3+ and Ce3+ co-doping and tape casting process. The Ce3+ substitution substantially enhanced the dimensionless figure-of-merit (ZT) due to the increases in electrical conductivity and absolute Seebeck coefficient. Of the studied samples, Ca0.9La0.025Ce0.075MnO3– δ had the maximum ZT (0.17) at 800 °C, and this value was 42% and 70% larger than those of singly doped Ca0.9La0.1MnO3– δ (0.12) and Ca0.9Ce0.1MnO3– δ (0.10), respectively. We demonstrate that both the La3+ and Ce3+ co-doping and tape casting process are highly promising approaches in enhancing the high-temperature thermoelectric transport properties of CaMnO3.

KW - Electrical conductivity

KW - Microstructure

KW - Sintering

KW - Thermoelectric properties

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