Effect of B-site substitution on the stability of La0.2Sr0.8Fe0.8B0.2O3−, B=Al, Ga, Cr, Ti, Ta, Nb

O.F. Lohne; J. Gurauskis; T.N. Phung; M.-A. Einarsrud; T. Grande; Henricus J.M. Bouwmeester; K. Wiik

doi:10.1016/j.ssi.2012.02.061

Effect of B-site substitution on the stability of La0.2Sr0.8Fe0.8B0.2O3−, B=Al, Ga, Cr, Ti, Ta, Nb

O.F. Lohne, J. Gurauskis, T.N. Phung, M.-A. Einarsrud, T. Grande, Henricus J.M. Bouwmeester, K. Wiik

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

20 Citations (Scopus)

6 Downloads (Pure)

Abstract

Single phase, cubic perovskites of composition La0.2Sr0.8Fe0.8B0.2O3 − δ, B = Al, Ga, Cr, Ti, Ta and Nb, were prepared by spray pyrolysis from aqueous precursor solutions. The effect of B-site substitution on the stability in a H2 containing atmosphere was investigated using temperature programmed reduction (TPR). High temperature X-ray diffraction (HT-XRD) was performed under conditions similar to those in the TPR experiments. La0.2Sr0.8FeO3 − δ forms a brownmillerite-type anion-deficient ordered perovskite upon reduction at T ≈ 500. B-site substitution suppresses oxygen vacancy ordering, maintaining a perovskite structure under the above reducing conditions up to T ≈ 700 °C. Trends in the kinetics of decomposition of B-site substituted La0.2Sr0.8FeO3 − δ are discussed.

Original language	English
Pages (from-to)	186-189
Journal	Solid state ionics
Volume	225
DOIs	https://doi.org/10.1016/j.ssi.2012.02.061
Publication status	Published - 2012

Keywords

IR-84194
METIS-290817

Access to Document

10.1016/j.ssi.2012.02.061

Cite this

@article{cd19de85aacd4d38baadaebdd777a3b7,

title = "Effect of B-site substitution on the stability of La0.2Sr0.8Fe0.8B0.2O3−, B=Al, Ga, Cr, Ti, Ta, Nb",

abstract = "Single phase, cubic perovskites of composition La0.2Sr0.8Fe0.8B0.2O3 − δ, B = Al, Ga, Cr, Ti, Ta and Nb, were prepared by spray pyrolysis from aqueous precursor solutions. The effect of B-site substitution on the stability in a H2 containing atmosphere was investigated using temperature programmed reduction (TPR). High temperature X-ray diffraction (HT-XRD) was performed under conditions similar to those in the TPR experiments. La0.2Sr0.8FeO3 − δ forms a brownmillerite-type anion-deficient ordered perovskite upon reduction at T ≈ 500. B-site substitution suppresses oxygen vacancy ordering, maintaining a perovskite structure under the above reducing conditions up to T ≈ 700 °C. Trends in the kinetics of decomposition of B-site substituted La0.2Sr0.8FeO3 − δ are discussed.",

keywords = "IR-84194, METIS-290817",

author = "O.F. Lohne and J. Gurauskis and T.N. Phung and M.-A. Einarsrud and T. Grande and Bouwmeester, {Henricus J.M.} and K. Wiik",

year = "2012",

doi = "10.1016/j.ssi.2012.02.061",

language = "English",

volume = "225",

pages = "186--189",

journal = "Solid state ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of B-site substitution on the stability of La0.2Sr0.8Fe0.8B0.2O3−, B=Al, Ga, Cr, Ti, Ta, Nb

AU - Lohne, O.F.

AU - Gurauskis, J.

AU - Phung, T.N.

AU - Einarsrud, M.-A.

AU - Grande, T.

AU - Bouwmeester, Henricus J.M.

AU - Wiik, K.

PY - 2012

Y1 - 2012

N2 - Single phase, cubic perovskites of composition La0.2Sr0.8Fe0.8B0.2O3 − δ, B = Al, Ga, Cr, Ti, Ta and Nb, were prepared by spray pyrolysis from aqueous precursor solutions. The effect of B-site substitution on the stability in a H2 containing atmosphere was investigated using temperature programmed reduction (TPR). High temperature X-ray diffraction (HT-XRD) was performed under conditions similar to those in the TPR experiments. La0.2Sr0.8FeO3 − δ forms a brownmillerite-type anion-deficient ordered perovskite upon reduction at T ≈ 500. B-site substitution suppresses oxygen vacancy ordering, maintaining a perovskite structure under the above reducing conditions up to T ≈ 700 °C. Trends in the kinetics of decomposition of B-site substituted La0.2Sr0.8FeO3 − δ are discussed.

AB - Single phase, cubic perovskites of composition La0.2Sr0.8Fe0.8B0.2O3 − δ, B = Al, Ga, Cr, Ti, Ta and Nb, were prepared by spray pyrolysis from aqueous precursor solutions. The effect of B-site substitution on the stability in a H2 containing atmosphere was investigated using temperature programmed reduction (TPR). High temperature X-ray diffraction (HT-XRD) was performed under conditions similar to those in the TPR experiments. La0.2Sr0.8FeO3 − δ forms a brownmillerite-type anion-deficient ordered perovskite upon reduction at T ≈ 500. B-site substitution suppresses oxygen vacancy ordering, maintaining a perovskite structure under the above reducing conditions up to T ≈ 700 °C. Trends in the kinetics of decomposition of B-site substituted La0.2Sr0.8FeO3 − δ are discussed.

KW - IR-84194

KW - METIS-290817

U2 - 10.1016/j.ssi.2012.02.061

DO - 10.1016/j.ssi.2012.02.061

M3 - Article

SN - 0167-2738

VL - 225

SP - 186

EP - 189

JO - Solid state ionics

JF - Solid state ionics

ER -

Effect of B-site substitution on the stability of La0.2Sr0.8Fe0.8B0.2O3−, B=Al, Ga, Cr, Ti, Ta, Nb

Abstract

Keywords

Access to Document

Fingerprint

Cite this