High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x

S W  Tao; F W  Poulsen; G Y  Meng; O T  Sorensen

High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x

S W Tao, F W Poulsen, G Y Meng, O T Sorensen

School of Chemistry

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

25 Citations (Scopus)

Abstract

La0.9Sr0.1Ga0.8Mg0.2O3-x (LSGM) has been prepared by a complexing sol-gel process and characterised by X-ray diffraction, thermogravimetric-differential thermal analysis (TG-DTA) and conventional weight analysis. The room-temperature structure is orthorhombic, space group Pnma, with a = 5.5340(14), b = 5.5074(22), c = 7.8003(31) Angstrom. After heating at 1000 degrees C, the lattice parameters of LSGM shift a little, and La4SrO7 and SrLaGaO4 separate from the parent phase, which may further affect other properties. The weight change of LSGM at 750 degrees C is insignificant and the phase is also stable after heating at 750 degrees C in a hydrogen atmosphere for a total of 132 h. Defect chemistry modelling supports the view that LSGM is not single phase at 1000 degrees C.

Original language	English
Pages (from-to)	1829-1833
Number of pages	5
Journal	Journal of Materials Chemistry
Volume	10
Publication status	Published - 2000

Keywords

DOPED LANTHANUM GALLATE
PEROVSKITE-TYPE OXIDE
CHEMICAL-STABILITY
FUEL-CELLS
ELECTROLYTE
PROTON
LAGAO3

Cite this

@article{1cf9cd95d4a349bebf402f7d89872e18,

title = "High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x",

abstract = "La0.9Sr0.1Ga0.8Mg0.2O3-x (LSGM) has been prepared by a complexing sol-gel process and characterised by X-ray diffraction, thermogravimetric-differential thermal analysis (TG-DTA) and conventional weight analysis. The room-temperature structure is orthorhombic, space group Pnma, with a = 5.5340(14), b = 5.5074(22), c = 7.8003(31) Angstrom. After heating at 1000 degrees C, the lattice parameters of LSGM shift a little, and La4SrO7 and SrLaGaO4 separate from the parent phase, which may further affect other properties. The weight change of LSGM at 750 degrees C is insignificant and the phase is also stable after heating at 750 degrees C in a hydrogen atmosphere for a total of 132 h. Defect chemistry modelling supports the view that LSGM is not single phase at 1000 degrees C.",

keywords = "DOPED LANTHANUM GALLATE, PEROVSKITE-TYPE OXIDE, CHEMICAL-STABILITY, FUEL-CELLS, ELECTROLYTE, PROTON, LAGAO3",

author = "Tao, {S W} and Poulsen, {F W} and Meng, {G Y} and Sorensen, {O T}",

year = "2000",

language = "English",

volume = "10",

pages = "1829--1833",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

publisher = "Royal Society of Chemistry",

}

TY - JOUR

T1 - High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x

AU - Tao, S W

AU - Poulsen, F W

AU - Meng, G Y

AU - Sorensen, O T

PY - 2000

Y1 - 2000

N2 - La0.9Sr0.1Ga0.8Mg0.2O3-x (LSGM) has been prepared by a complexing sol-gel process and characterised by X-ray diffraction, thermogravimetric-differential thermal analysis (TG-DTA) and conventional weight analysis. The room-temperature structure is orthorhombic, space group Pnma, with a = 5.5340(14), b = 5.5074(22), c = 7.8003(31) Angstrom. After heating at 1000 degrees C, the lattice parameters of LSGM shift a little, and La4SrO7 and SrLaGaO4 separate from the parent phase, which may further affect other properties. The weight change of LSGM at 750 degrees C is insignificant and the phase is also stable after heating at 750 degrees C in a hydrogen atmosphere for a total of 132 h. Defect chemistry modelling supports the view that LSGM is not single phase at 1000 degrees C.

AB - La0.9Sr0.1Ga0.8Mg0.2O3-x (LSGM) has been prepared by a complexing sol-gel process and characterised by X-ray diffraction, thermogravimetric-differential thermal analysis (TG-DTA) and conventional weight analysis. The room-temperature structure is orthorhombic, space group Pnma, with a = 5.5340(14), b = 5.5074(22), c = 7.8003(31) Angstrom. After heating at 1000 degrees C, the lattice parameters of LSGM shift a little, and La4SrO7 and SrLaGaO4 separate from the parent phase, which may further affect other properties. The weight change of LSGM at 750 degrees C is insignificant and the phase is also stable after heating at 750 degrees C in a hydrogen atmosphere for a total of 132 h. Defect chemistry modelling supports the view that LSGM is not single phase at 1000 degrees C.

KW - DOPED LANTHANUM GALLATE

KW - PEROVSKITE-TYPE OXIDE

KW - CHEMICAL-STABILITY

KW - FUEL-CELLS

KW - ELECTROLYTE

KW - PROTON

KW - LAGAO3

UR - http://www.scopus.com/inward/record.url?scp=0033836148&partnerID=8YFLogxK

M3 - Article

SN - 0959-9428

VL - 10

SP - 1829

EP - 1833

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

ER -

High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x

Abstract

Keywords

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