Microstructural and microchemical characterization of the interface between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2

C. Clausen; C. Bagger; Jørgen Bilde-Sørensen; A. Horsewell

doi:10.1016/0167-2738(94)90287-9

Microstructural and microchemical characterization of the interface between La₀_.₈₅Sr₀_.₁₅MnO₃ and Y₂O₃-stabilized ZrO₂

C. Clausen, C. Bagger, Jørgen Bilde-Sørensen, A. Horsewell

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

Abstract

La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2 may be used as cathode and electrolyte materials, respectively, in solid oxide fuel cells. One of the requirements of the cathode-electrolyte interface is that high impedance phases are not formed at the interface during manufacture or operation of the SOFC. The interfaces of interest were prepared as a diffusion couple and by sintered powder mixtures of La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. The structures at the interfaces were examined by transmission electron microscopy. Chemical analyses were made by energy dispersive X-ray spectroscopy. A Zr, La-based pyrochlore-type crystalline phase has been observed at some of the interfaces between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. In the present paper, changes in element ratios are used to obtain knowledge on how the elements diffuse with respect to each other at the interface. It was found that the formation of pyrochlore depends on the content of Mn in the La0.85Sr0.15MnO3 and on the ratio between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2.

Original language	English
Journal	Solid State Ionics
Volume	70-71
Pages (from-to)	59-64
ISSN	0167-2738
DOIs	https://doi.org/10.1016/0167-2738(94)90287-9
Publication status	Published - 1994

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@article{f31360e393834268a39fe930af12c083,

title = "Microstructural and microchemical characterization of the interface between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2",

abstract = "La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2 may be used as cathode and electrolyte materials, respectively, in solid oxide fuel cells. One of the requirements of the cathode-electrolyte interface is that high impedance phases are not formed at the interface during manufacture or operation of the SOFC. The interfaces of interest were prepared as a diffusion couple and by sintered powder mixtures of La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. The structures at the interfaces were examined by transmission electron microscopy. Chemical analyses were made by energy dispersive X-ray spectroscopy. A Zr, La-based pyrochlore-type crystalline phase has been observed at some of the interfaces between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. In the present paper, changes in element ratios are used to obtain knowledge on how the elements diffuse with respect to each other at the interface. It was found that the formation of pyrochlore depends on the content of Mn in the La0.85Sr0.15MnO3 and on the ratio between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. ",

keywords = "Fremtidig energiteknologi",

author = "C. Clausen and C. Bagger and J{\o}rgen Bilde-S{\o}rensen and A. Horsewell",

year = "1994",

doi = "10.1016/0167-2738(94)90287-9",

language = "English",

volume = "70-71",

pages = "59--64",

journal = "Solid State Ionics",

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TY - JOUR

T1 - Microstructural and microchemical characterization of the interface between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2

AU - Clausen, C.

AU - Bagger, C.

AU - Bilde-Sørensen, Jørgen

AU - Horsewell, A.

PY - 1994

Y1 - 1994

N2 - La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2 may be used as cathode and electrolyte materials, respectively, in solid oxide fuel cells. One of the requirements of the cathode-electrolyte interface is that high impedance phases are not formed at the interface during manufacture or operation of the SOFC. The interfaces of interest were prepared as a diffusion couple and by sintered powder mixtures of La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. The structures at the interfaces were examined by transmission electron microscopy. Chemical analyses were made by energy dispersive X-ray spectroscopy. A Zr, La-based pyrochlore-type crystalline phase has been observed at some of the interfaces between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. In the present paper, changes in element ratios are used to obtain knowledge on how the elements diffuse with respect to each other at the interface. It was found that the formation of pyrochlore depends on the content of Mn in the La0.85Sr0.15MnO3 and on the ratio between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2.

AB - La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2 may be used as cathode and electrolyte materials, respectively, in solid oxide fuel cells. One of the requirements of the cathode-electrolyte interface is that high impedance phases are not formed at the interface during manufacture or operation of the SOFC. The interfaces of interest were prepared as a diffusion couple and by sintered powder mixtures of La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. The structures at the interfaces were examined by transmission electron microscopy. Chemical analyses were made by energy dispersive X-ray spectroscopy. A Zr, La-based pyrochlore-type crystalline phase has been observed at some of the interfaces between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2. In the present paper, changes in element ratios are used to obtain knowledge on how the elements diffuse with respect to each other at the interface. It was found that the formation of pyrochlore depends on the content of Mn in the La0.85Sr0.15MnO3 and on the ratio between La0.85Sr0.15MnO3 and Y2O3-stabilized ZrO2.

KW - Fremtidig energiteknologi

U2 - 10.1016/0167-2738(94)90287-9

DO - 10.1016/0167-2738(94)90287-9

M3 - Journal article

SN - 0167-2738

VL - 70-71

SP - 59

EP - 64

JO - Solid State Ionics

JF - Solid State Ionics