Influence of alumina impurities on microstructure of LSM-CeO<inf>2</inf> composites

Sanjit Bhowmick; Yuan Xue; Jonathan Winterstein; C. Barry Carter

doi:10.1016/j.ssi.2011.02.007

Influence of alumina impurities on microstructure of LSM-CeO<inf>2</inf> composites

Sanjit Bhowmick
, Yuan Xue
, Jonathan Winterstein
, C. Barry Carter

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

1 Scopus citations

Abstract

A two-phase model composite of LSM-CeO2 was developed to simulate triple phase boundaries of SOFC and to study the impact of alumina impurities on the microstructure. Interfaces between cerium oxide and 10 at.% strontium-doped lanthanum manganite (LSM) were characterized using X-ray diffraction, atomic-force microscopy, focused ion beam milling, field-emission scanning electron microscopy, X-ray energy dispersive spectroscopy and transmission electron microscopy. LSM, which is synthesized by conventional mechanical milling, is found to be doped with alumina from the grinding balls. When LSM powder is mixed with CeO2 and sintered at 1400 °C for 4 h, manganese aluminate spinel, MnAl2O4 and Mn 2AlO4, forms at LSM/LSM, LSM/CeO2 and CeO 2/CeO2 boundaries. The influence of (Mn,Al) 3O4 phase on the mechanical integrity and performance of the cells is discussed. © 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	68-77
Number of pages	10
Journal	Solid State Ionics
Volume	187
Issue number	1
DOIs	https://doi.org/10.1016/j.ssi.2011.02.007
State	Published - Apr 8 2011
Externally published	Yes

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@article{be625076b34b4952981898dac14399f7,

title = "Influence of alumina impurities on microstructure of LSM-CeO2 composites",

abstract = "A two-phase model composite of LSM-CeO2 was developed to simulate triple phase boundaries of SOFC and to study the impact of alumina impurities on the microstructure. Interfaces between cerium oxide and 10 at.\% strontium-doped lanthanum manganite (LSM) were characterized using X-ray diffraction, atomic-force microscopy, focused ion beam milling, field-emission scanning electron microscopy, X-ray energy dispersive spectroscopy and transmission electron microscopy. LSM, which is synthesized by conventional mechanical milling, is found to be doped with alumina from the grinding balls. When LSM powder is mixed with CeO2 and sintered at 1400 °C for 4 h, manganese aluminate spinel, MnAl2O4 and Mn 2AlO4, forms at LSM/LSM, LSM/CeO2 and CeO 2/CeO2 boundaries. The influence of (Mn,Al) 3O4 phase on the mechanical integrity and performance of the cells is discussed. {\textcopyright} 2011 Elsevier B.V. All rights reserved.",

author = "Sanjit Bhowmick and Yuan Xue and Jonathan Winterstein and Carter, \{C. Barry\}",

year = "2011",

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doi = "10.1016/j.ssi.2011.02.007",

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TY - JOUR

T1 - Influence of alumina impurities on microstructure of LSM-CeO2 composites

AU - Bhowmick, Sanjit

AU - Xue, Yuan

AU - Winterstein, Jonathan

AU - Carter, C. Barry

PY - 2011/4/8

Y1 - 2011/4/8

N2 - A two-phase model composite of LSM-CeO2 was developed to simulate triple phase boundaries of SOFC and to study the impact of alumina impurities on the microstructure. Interfaces between cerium oxide and 10 at.% strontium-doped lanthanum manganite (LSM) were characterized using X-ray diffraction, atomic-force microscopy, focused ion beam milling, field-emission scanning electron microscopy, X-ray energy dispersive spectroscopy and transmission electron microscopy. LSM, which is synthesized by conventional mechanical milling, is found to be doped with alumina from the grinding balls. When LSM powder is mixed with CeO2 and sintered at 1400 °C for 4 h, manganese aluminate spinel, MnAl2O4 and Mn 2AlO4, forms at LSM/LSM, LSM/CeO2 and CeO 2/CeO2 boundaries. The influence of (Mn,Al) 3O4 phase on the mechanical integrity and performance of the cells is discussed. © 2011 Elsevier B.V. All rights reserved.

AB - A two-phase model composite of LSM-CeO2 was developed to simulate triple phase boundaries of SOFC and to study the impact of alumina impurities on the microstructure. Interfaces between cerium oxide and 10 at.% strontium-doped lanthanum manganite (LSM) were characterized using X-ray diffraction, atomic-force microscopy, focused ion beam milling, field-emission scanning electron microscopy, X-ray energy dispersive spectroscopy and transmission electron microscopy. LSM, which is synthesized by conventional mechanical milling, is found to be doped with alumina from the grinding balls. When LSM powder is mixed with CeO2 and sintered at 1400 °C for 4 h, manganese aluminate spinel, MnAl2O4 and Mn 2AlO4, forms at LSM/LSM, LSM/CeO2 and CeO 2/CeO2 boundaries. The influence of (Mn,Al) 3O4 phase on the mechanical integrity and performance of the cells is discussed. © 2011 Elsevier B.V. All rights reserved.

UR - https://www.scopus.com/pages/publications/79953740049

U2 - 10.1016/j.ssi.2011.02.007

DO - 10.1016/j.ssi.2011.02.007

M3 - Article

SN - 0167-2738

VL - 187

SP - 68

EP - 77

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1

ER -

Influence of alumina impurities on microstructure of LSM-CeO<inf>2</inf> composites

Abstract

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