Thermoelectric properties of hot-pressed Ruddlesden-Popper phases CaO(CaMnO3)m

Yixuan Shi; Leilane R. Macario; Cheryl Sturm; Nour Mashmoushi; Yaron Amouyal; Holger Kleinke

doi:https://doi.org/10.1111/jace.19221

Thermoelectric properties of hot-pressed Ruddlesden-Popper phases CaO(CaMnO₃)_m

Yixuan Shi, Leilane R. Macario, Cheryl Sturm, Nour Mashmoushi, Yaron Amouyal, Holger Kleinke

Materials Science & Engineering

Technion - Israel Institute of Technology

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

Abstract

We investigated the Ruddlesden-Popper series CaO(CaMnO₃)_m with m = 1, 2, 3, ∞, to study the impact of the varying amounts of CaO layers on their thermoelectric properties. Previous studies showed that highly dense samples are difficult to obtain due to the refractory nature of these materials. In this study, we managed to obtain dense pellets during a classical hot-pressing step, if and only if the samples were subjected to extended ball-milling prior to pressing, resulting in crystallite sizes of 30–35 nm after hot-pressing. The sample with the largest amount of CaO layers (m = 1) had the lowest electrical and thermal conductivity, and the highest Seebeck coefficient, as predicted. Ultimately the perovskite CaMnO₃ (m = ∞, no CaO layers) exhibited the best thermoelectric properties.

Original language	English
Pages (from-to)	6098-6105
Number of pages	8
Journal	Journal of the American Ceramic Society
Volume	106
Issue number	10
DOIs	https://doi.org/10.1111/jace.19221
State	Published - Oct 2023

Keywords

Ruddlesden-Popper phases
oxides
perovskites
semiconductors
thermoelectric materials

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

Access to Document

https://doi.org/10.1111/jace.19221

Cite this

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title = "Thermoelectric properties of hot-pressed Ruddlesden-Popper phases CaO(CaMnO3)m",

abstract = "We investigated the Ruddlesden-Popper series CaO(CaMnO3)m with m = 1, 2, 3, ∞, to study the impact of the varying amounts of CaO layers on their thermoelectric properties. Previous studies showed that highly dense samples are difficult to obtain due to the refractory nature of these materials. In this study, we managed to obtain dense pellets during a classical hot-pressing step, if and only if the samples were subjected to extended ball-milling prior to pressing, resulting in crystallite sizes of 30–35 nm after hot-pressing. The sample with the largest amount of CaO layers (m = 1) had the lowest electrical and thermal conductivity, and the highest Seebeck coefficient, as predicted. Ultimately the perovskite CaMnO3 (m = ∞, no CaO layers) exhibited the best thermoelectric properties.",

keywords = "Ruddlesden-Popper phases, oxides, perovskites, semiconductors, thermoelectric materials",

author = "Yixuan Shi and Macario, {Leilane R.} and Cheryl Sturm and Nour Mashmoushi and Yaron Amouyal and Holger Kleinke",

note = "Publisher Copyright: {\textcopyright} 2023 The American Ceramic Society.",

year = "2023",

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doi = "https://doi.org/10.1111/jace.19221",

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T1 - Thermoelectric properties of hot-pressed Ruddlesden-Popper phases CaO(CaMnO3)m

AU - Shi, Yixuan

AU - Macario, Leilane R.

AU - Sturm, Cheryl

AU - Mashmoushi, Nour

AU - Amouyal, Yaron

AU - Kleinke, Holger

PY - 2023/10

Y1 - 2023/10

N2 - We investigated the Ruddlesden-Popper series CaO(CaMnO3)m with m = 1, 2, 3, ∞, to study the impact of the varying amounts of CaO layers on their thermoelectric properties. Previous studies showed that highly dense samples are difficult to obtain due to the refractory nature of these materials. In this study, we managed to obtain dense pellets during a classical hot-pressing step, if and only if the samples were subjected to extended ball-milling prior to pressing, resulting in crystallite sizes of 30–35 nm after hot-pressing. The sample with the largest amount of CaO layers (m = 1) had the lowest electrical and thermal conductivity, and the highest Seebeck coefficient, as predicted. Ultimately the perovskite CaMnO3 (m = ∞, no CaO layers) exhibited the best thermoelectric properties.

AB - We investigated the Ruddlesden-Popper series CaO(CaMnO3)m with m = 1, 2, 3, ∞, to study the impact of the varying amounts of CaO layers on their thermoelectric properties. Previous studies showed that highly dense samples are difficult to obtain due to the refractory nature of these materials. In this study, we managed to obtain dense pellets during a classical hot-pressing step, if and only if the samples were subjected to extended ball-milling prior to pressing, resulting in crystallite sizes of 30–35 nm after hot-pressing. The sample with the largest amount of CaO layers (m = 1) had the lowest electrical and thermal conductivity, and the highest Seebeck coefficient, as predicted. Ultimately the perovskite CaMnO3 (m = ∞, no CaO layers) exhibited the best thermoelectric properties.

KW - Ruddlesden-Popper phases

KW - oxides

KW - perovskites

KW - semiconductors

KW - thermoelectric materials

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DO - https://doi.org/10.1111/jace.19221

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EP - 6105

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

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