Yttrium doping of Ba0.5Sr0.5Co0.8Fe0.2O3-δ part II: Influence on oxygen transport and phase stability

Lana Simone Unger; Rian Ruhl; Matthias Meffert; Christian Niedrig; Wolfgang Menesklou; Stefan F. Wagner; Dagmar Gerthsen; Henny J.M. Bouwmeester; Ellen Ivers-Tiffée

doi:10.1016/j.jeurceramsoc.2017.12.042

Yttrium doping of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ part II: Influence on oxygen transport and phase stability

Lana Simone Unger^* (Corresponding Author), Rian Ruhl, Matthias Meffert, Christian Niedrig, Wolfgang Menesklou, Stefan F. Wagner, Dagmar Gerthsen, Henny J.M. Bouwmeester, Ellen Ivers-Tiffée

^*Corresponding author for this work

Inorganic Membranes

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Abstract

Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ (BSCF) in its cubic perovskite phase has attracted much interest for potential use as oxygen transport membrane (OTM) due to its very high oxygen permeability at high temperatures. However, performance degradation due to a sluggish phase decomposition occurs when BSCF is operated below 840 °C. Partial B-site substitution of the transition metal cations in BSCF by larger and redox-stable cations has emerged as a potential strategy to improve the structural stability of cubic BSCF. In this study, the influence of yttrium doping (0…10 mol-%) on oxygen transport properties and stability of the cubic BSCF phase is assessed by in situ electrical conductivity relaxation (ECR) and electrical conductivity measurements during long-term thermal annealing both at 700 °C and 800 °C. Detailed phase analysis is performed by scanning electron microscopy (SEM) after long-term annealing of the samples in air at different temperatures.

Original language	English
Pages (from-to)	2388-2395
Number of pages	8
Journal	Journal of the European Ceramic Society
Volume	38
Issue number	5
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2017.12.042
Publication status	Published - 1 May 2018

Keywords

BSCF
Electrical conductivity relaxation
Oxygen transport membrane
Structural stability
Yttrium doping
n/a OA procedure

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10.1016/j.jeurceramsoc.2017.12.042

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title = "Yttrium doping of Ba0.5Sr0.5Co0.8Fe0.2O3-δ part II: Influence on oxygen transport and phase stability",

abstract = "Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) in its cubic perovskite phase has attracted much interest for potential use as oxygen transport membrane (OTM) due to its very high oxygen permeability at high temperatures. However, performance degradation due to a sluggish phase decomposition occurs when BSCF is operated below 840 °C. Partial B-site substitution of the transition metal cations in BSCF by larger and redox-stable cations has emerged as a potential strategy to improve the structural stability of cubic BSCF. In this study, the influence of yttrium doping (0…10 mol-%) on oxygen transport properties and stability of the cubic BSCF phase is assessed by in situ electrical conductivity relaxation (ECR) and electrical conductivity measurements during long-term thermal annealing both at 700 °C and 800 °C. Detailed phase analysis is performed by scanning electron microscopy (SEM) after long-term annealing of the samples in air at different temperatures.",

keywords = "BSCF, Electrical conductivity relaxation, Oxygen transport membrane, Structural stability, Yttrium doping, n/a OA procedure",

author = "Unger, {Lana Simone} and Rian Ruhl and Matthias Meffert and Christian Niedrig and Wolfgang Menesklou and Wagner, {Stefan F.} and Dagmar Gerthsen and Bouwmeester, {Henny J.M.} and Ellen Ivers-Tiff{\'e}e",

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T2 - Influence on oxygen transport and phase stability

AU - Unger, Lana Simone

AU - Ruhl, Rian

AU - Meffert, Matthias

AU - Niedrig, Christian

AU - Menesklou, Wolfgang

AU - Wagner, Stefan F.

AU - Gerthsen, Dagmar

AU - Bouwmeester, Henny J.M.

AU - Ivers-Tiffée, Ellen

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) in its cubic perovskite phase has attracted much interest for potential use as oxygen transport membrane (OTM) due to its very high oxygen permeability at high temperatures. However, performance degradation due to a sluggish phase decomposition occurs when BSCF is operated below 840 °C. Partial B-site substitution of the transition metal cations in BSCF by larger and redox-stable cations has emerged as a potential strategy to improve the structural stability of cubic BSCF. In this study, the influence of yttrium doping (0…10 mol-%) on oxygen transport properties and stability of the cubic BSCF phase is assessed by in situ electrical conductivity relaxation (ECR) and electrical conductivity measurements during long-term thermal annealing both at 700 °C and 800 °C. Detailed phase analysis is performed by scanning electron microscopy (SEM) after long-term annealing of the samples in air at different temperatures.

AB - Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) in its cubic perovskite phase has attracted much interest for potential use as oxygen transport membrane (OTM) due to its very high oxygen permeability at high temperatures. However, performance degradation due to a sluggish phase decomposition occurs when BSCF is operated below 840 °C. Partial B-site substitution of the transition metal cations in BSCF by larger and redox-stable cations has emerged as a potential strategy to improve the structural stability of cubic BSCF. In this study, the influence of yttrium doping (0…10 mol-%) on oxygen transport properties and stability of the cubic BSCF phase is assessed by in situ electrical conductivity relaxation (ECR) and electrical conductivity measurements during long-term thermal annealing both at 700 °C and 800 °C. Detailed phase analysis is performed by scanning electron microscopy (SEM) after long-term annealing of the samples in air at different temperatures.

KW - BSCF

KW - Electrical conductivity relaxation

KW - Oxygen transport membrane

KW - Structural stability

KW - Yttrium doping

KW - n/a OA procedure

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M3 - Article

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SN - 0955-2219

VL - 38

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EP - 2395

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 5

ER -

Yttrium doping of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ part II: Influence on oxygen transport and phase stability

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