The in situ generated emerging phase inside dual phase oxygen transport membranes

Article Chemistry, Physical

Phase formation and performance of solid state reactive sintered Ce0.8Gd0.2O2-δ-FeCo2O4 composites

Liudmila Fischer et al.

Summary: Reactive sintering of Ce0.8Gd0.2O2-δ-FeCo2O4 composites leads to the formation of desired mixed ionic electronic conductivity, with the specific microstructure playing a crucial role in membrane performance.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Materials Science, Multidisciplinary

Tuning the ceria interfaces inside the dual phase oxygen transport membranes

Ke Ran et al.

Summary: Dual-phase oxygen transport membranes (DP-OTMs) provide a good alternative for oxygen separation, with the performance of CGO-FCO composite dominated by CGO grain boundaries. However, the atomistic environment of the boundaries remains largely unknown, limiting the optimization of membrane performance. Using advanced transmission electron microscopy techniques, researchers quantified the atomic and chemical structures of CGO boundaries in CGO-FCO membranes, providing insights for optimized membrane processing.

ACTA MATERIALIA (2022)

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Article Materials Science, Ceramics

Mechanical reliability of Ce0.8Gd0.2O2-δ-FeCo2O4 dual phase membranes synthesized by one-step solid-state reaction

Fanlin Zeng et al.

Summary: Ce0.8Gd0.2O2-delta-FeCo2O4 composites synthesized through sintering process exhibit reduced fracture strengths due to tensile residual stresses and microcracks, necessitating further improvements for long-term reliable operation.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2021)

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Article Materials Science, Ceramics

Optimization of sintering conditions for improved microstructural and mechanical properties of dense Ce0.8Gd0.2O2-delta-FeCo2O4 oxygen transport membranes

Fanlin Zeng et al.

Summary: After studying the phase interactions among the initial powder mixtures, sintering at approximately 1050 degrees C was found to accelerate the densification process. Increasing the sintering temperature to 1200 degrees C further homogenized the pore distribution, resulting in enhanced mechanical strength. Sintering at 1200 degrees C was determined to be the optimal temperature, achieving a high microstructure density and improved mechanical properties.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2021)

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Article Materials Science, Ceramics

Residual stress and mechanical strength of Ce0.8Gd0.2O2-δ-FeCo2O4 dual phase oxygen transport membranes

Fanlin Zeng et al.

Summary: Ce0.8Gd0.2O2-δ-FeCo2O4 membranes have broad application potential in oxygen-consuming industrial processes due to excellent chemical stability, but sufficient mechanical strength is needed for long-term reliable operation. The study reveals that mechanical strengths of the membranes increase with decreasing iron cobalt spinel content, while high iron cobalt spinel content induces microcracks and high residual tensile stress. It is suggested to limit the iron cobalt spinel content to eliminate residual tensile stress while maintaining high mechanical strength.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2021)

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Article Engineering, Chemical

Enhancing oxygen permeation of solid-state reactive sintered Ce0.8Gd0.2O2-?-FeCo2O4 composite by optimizing the powder preparation method

Fanlin Zeng et al.

Summary: By optimizing the powder preparation method for a solid-state reactive sintering process, the blocking effects of individual phases within dual phase membranes can be alleviated. Homogenous powder mixtures with fine particle size can achieve high oxygen permeance.

JOURNAL OF MEMBRANE SCIENCE (2021)

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Article Materials Science, Ceramics

Phase and microstructural characterizations for Ce0.8Gd0.2O2-δ-FeCo2O4 dual phase oxygen transport membranes

Fanlin Zeng et al.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2020)

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Article Chemistry, Multidisciplinary

Direction observation of the grain boundary segregation in molybdenum substituted lanthanum tungstate membranes

Ke Ran et al.

NANOSCALE (2020)

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Article Engineering, Chemical

Various influence of surface modification on permeability and phase stability through an oxygen permeable membrane

Jian Xue et al.

JOURNAL OF MEMBRANE SCIENCE (2019)

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Article Chemistry, Multidisciplinary

Microstructural and Interfacial Designs of Oxygen-Permeable Membranes for Oxygen Separation and Reaction-Separation Coupling

Xuefeng Zhu et al.

ADVANCED MATERIALS (2019)

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Article Materials Science, Multidisciplinary

Processing-induced secondary phase formation in Mo-substituted lanthanum tungstate membranes

Ke Ran et al.

ACTA MATERIALIA (2019)

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Article Materials Science, Multidisciplinary

The Impact of Fe Addition on the Electronic Conductivity of Gadolinium Doped Ceria

A. Buchheit et al.

ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY (2019)

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Article Physics, Multidisciplinary

Atomic-Scale Measurement of Flexoelectric Polarization at SrTiO3 Dislocations

Peng Gao et al.

PHYSICAL REVIEW LETTERS (2018)

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Article Engineering, Chemical

Structural and chemical stability of high performance Ce0.8Gd0.2O2-δ - FeCo2O4 dual phase oxygen transport membranes

M. Ramasamy et al.

JOURNAL OF MEMBRANE SCIENCE (2017)

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Article Multidisciplinary Sciences

Atomically ordered solute segregation behaviour in an oxide grain boundary

Bin Feng et al.

NATURE COMMUNICATIONS (2016)

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Article Materials Science, Multidisciplinary

Atomic structure and chemistry of dislocation cores at low-angle tilt grain boundary in SrTiO3 bicrystals

Hongchu Du et al.

ACTA MATERIALIA (2015)

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Article Chemistry, Multidisciplinary

Atomic Structure of Antiphase Nanodomains in Fe-Doped SrTiO3 Films

Hongchu Du et al.

ADVANCED FUNCTIONAL MATERIALS (2015)

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Article Chemistry, Multidisciplinary

A Mixed Ionic and Electronic Conducting Dual-Phase Membrane with High Oxygen Permeability

Wei Fang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

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Article Multidisciplinary Sciences

Enhancing grain boundary ionic conductivity in mixed ionic-electronic conductors

Ye Lin et al.

NATURE COMMUNICATIONS (2015)

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Article Chemistry, Physical

Fast Oxygen Separation Through SO2- and CO2-Stable Dual-Phase Membrane Based on NiFe2O4-Ce0.8Tb0.2O2-δ

Maria Balaguer et al.

CHEMISTRY OF MATERIALS (2013)

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Article Materials Science, Multidisciplinary

Microstructural and Chemical Characterization of Ordered Structure in Yttrium Doped Ceria

Pengfei Yan et al.

MICROSCOPY AND MICROANALYSIS (2013)

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Article Chemistry, Physical

Novel Cobalt-Free, Noble Metal-Free Oxygen-Permeable 40Pr0.6Sr0.4FeO3-δ-60Ce0.9Pr0.1O2-δ, Dual-Phase Membrane

Huixia Luo et al.

CHEMISTRY OF MATERIALS (2012)

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Article Chemistry, Multidisciplinary

CO2-Stable and Cobalt-Free Dual-Phase Membrane for Oxygen Separation

Huixia Luo et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2011)

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Article Chemistry, Multidisciplinary

VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data

Koichi Momma et al.

JOURNAL OF APPLIED CRYSTALLOGRAPHY (2011)

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Article Chemistry, Physical

Dopant-concentration dependence of grain-boundary conductivity in ceria: A space-charge analysis

Hugo J. Avila-Paredes et al.

JOURNAL OF MATERIALS CHEMISTRY (2009)

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Article Engineering, Chemical

Relationship between homogeneity and oxygen permeability of composite membranes

Xuefeng Zhu et al.

JOURNAL OF MEMBRANE SCIENCE (2008)

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Article Physics, Applied

Oxygen vacancy ordering in heavily rare-earth-doped ceria

Ding Rong Ou et al.

APPLIED PHYSICS LETTERS (2006)

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Review Materials Science, Multidisciplinary

Electrical properties of the grain boundaries of oxygen ion conductors: Acceptor-doped zirconia and ceria

X Guo et al.

PROGRESS IN MATERIALS SCIENCE (2006)

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Article Chemistry, Inorganic & Nuclear

High-pressure structural behavior of GdAlO3 and GdFeO3 perovskites

NL Ross et al.

JOURNAL OF SOLID STATE CHEMISTRY (2004)

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Article Materials Science, Ceramics

CeO2-CoO phase diagram

M Chen et al.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2003)

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Article Materials Science, Multidisciplinary

Quantification of ferrous/ferric ratios in minerals:: new evaluation schemes of Fe L23 electron energy-loss near-edge spectra

PA van Aken et al.

PHYSICS AND CHEMISTRY OF MINERALS (2002)

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Article Materials Science, Ceramics

Densification, microstructure and grain growth in the CeO2-Fe2O3 system (0 ≤ Fe/Ce ≤ 20%)

TS Zhang et al.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2001)

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Article Microscopy

EELS analysis of cation valence states and oxygen vacancies in magnetic oxides

ZL Wang et al.

MICRON (2000)

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The in situ generated emerging phase inside dual phase oxygen transport membranes

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