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

Zeng, Fanlin; Malzbender, Jürgen; Baumann, Stefan; Nijmeijer, Arian; Winnubst, Louis; Ziegner, Mirko; Guillon, Olivier; Schwaiger, Ruth; Meulenberg, Wilhelm Albert

doi:10.1016/j.jeurceramsoc.2020.09.009

Cited by 19 publications

(24 citation statements)

References 71 publications

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“…Such a reaction can easily reach a balance at the sintering temperature, that is, 1200°C, because of the fast diffusion. The content of formed GCFCO remains stable upon cooling 71 . Since the average Gd content in GCFCO was reported as almost constant, 48,53 a similar amount of GCFCO in the surface and the bulk (Figure 4) implies that the total consumed Gd amount from Ce 0.8 Gd 0.2 O 1.9 is the same.…”

Section: Resultsmentioning

confidence: 88%

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Mechanical reliability of Ce_0.8Gd_0.2O₂₋_δ‐FeCo₂O₄ dual phase membranes synthesized by one‐step solid‐state reaction

et al. 2020

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Ce 0.8 Gd 0.2 O 2-δ-FeCo 2 O 4 composites are attractive candidate materials for high-purity oxygen generation providing robust chemical stability. Aiming for future industrial applications, a feasible solid-state reaction process with one thermal processing step was used to synthesize 50 wt% Ce 0.8 Gd 0.2 O 2-δ :50 wt% FeCo 2 O 4 and 85 wt% Ce 0.8 Gd 0.2 O 2-δ :15 wt% FeCo 2 O 4 composites. Mechanical reliabilities of the sintered membranes were assessed based on the characterized mechanical properties and subcritical crack growth behavior. In general, the fracture strengths of as-sintered membranes were reduced by tensile residual stresses and microcracks. In particular, the enhanced subcritical crack growth behavior, which leads to limited stress tolerance and high Accepted Article This article is protected by copyright. All rights reserved failure probability after a 10-years operation, was evaluated in more detail. Further materials and processing improvements are needed to eliminate the tensile stress and microcracks to warrant a long-term reliable operation of the composites.

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Section: Resultsmentioning

confidence: 88%

“…The fracture toughness (

K_{IC}

) and hardness (

H

) were determined for the polished pellet using the conventional Vickers indentation method 70 . Detailed experimental procedures and equations for derivations of

K_{IC}

and

H

can be found in our previous publication 71 …”

Section: Methodsmentioning

confidence: 99%

Mechanical reliability of Ce_0.8Gd_0.2O₂₋_δ‐FeCo₂O₄ dual phase membranes synthesized by one‐step solid‐state reaction

et al. 2020

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“…Ceramic oxide transport membranes due to their 100% selectivity to oxygen, find wide range of applications in areas of pure oxygen production, carbon capture/ storage, petrochemical processes and oxy-combustion. [102][103][104][105][106] [102] for oxygen transport. [106] According to recent reports, Ce 0.8 Gd 0.2 O 1.9 as ionic conducting phase, promised mechanical and chemical stability in corrosive atmospheres (e. g., SO 2 , CO 2 ) at elevated temperature (~850°C).…”

Section: Dual Phase Membranesmentioning

confidence: 99%

“…[102][103][104][105][106] [102] for oxygen transport. [106] According to recent reports, Ce 0.8 Gd 0.2 O 1.9 as ionic conducting phase, promised mechanical and chemical stability in corrosive atmospheres (e. g., SO 2 , CO 2 ) at elevated temperature (~850°C). [103] Ramasamy and co-workers [107] identified a stable Cerium based Dual phase Oxygen permeation membrane material (60 wt% Ce 0.8 Gd 0.2 O 2-d : 40 wt% FeCo 2 O 4 ) synthesised via a modified Pechini process.…”

Section: Dual Phase Membranesmentioning

confidence: 99%

“…Sintering at this temperature contributes to the homogenization of the pore distribution and a higher density along with improved homogeneity of pore distribution result in enhanced mechanical strength. [106] Moreover, it was revealed that high iron-cobalt content induced microcracks thereby decreasing the mechanical strength of the sintered membrane with gradual decrease in residual tensile stress on going from surface to bulk. [109] The study of another aspect of the above Ceramic oxide membrane by Zeng et al [105] revealed that, with similar grain sizes of all phases in the composites, the ambipolar conductivity gets optimised at 4 : 1 volume ratio of ionic conducting phase to electronic conducting phase, respectively as shown by the graph in Figure 13-b.…”

Section: Dual Phase Membranesmentioning

confidence: 99%

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Advances in Electrochemical and Catalytic Performance of Nanostructured FeCo₂O₄ and Its Composites

Shetgaonkar

Salkar

Morajkar

2021

Chemistry An Asian Journal

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It is well established that the excessive and uncontrolled use of fossil fuels and organic chemicals have put a risk to the earth‘s environment and the life that sustains within it. Carbon‐free, sustainable, alternative energy technologies have therefore become the prime focus of current research. Smart inorganic materials have emerged as the potential solution to suffice energy needs and remediate the organic pollutants discharged to the environment. One such promising, versatile material is FeCo2O4 which has gained immense research interest in the present decade due to its high efficiency and performance in energy and environmental applications. Innovative material design strategies involving the interplay of nanostructured morphology, chemical composition, redox surface states, and defect engineering have significantly enhanced both electrochemical and catalytic properties of FeCo2O4. Therefore, this review article aims to provide the first‐ever comprehensive account of the latest research and developments in design‐synthesis strategies, characterization techniques, and applications of nanostructured FeCo2O4 and its composites in various electrochemical as well as catalytic applications. A detailed account of the nanostructured FeCo2O4 and its composites in various energy storage and conversion devices such as supercapacitors (SCs), batteries, and fuel cells has been presented. Furthermore, a special section has been devoted to highlight the role of FeCo2O4 in enhancing the sluggish reaction kinetics of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in water splitting application. This review also highlights the role of nanostructured FeCo2O4 in photocatalytic waste water treatment, gas sensing, and dual‐phase membrane technologies wherein FeCo2O4 has demonstrated promising performance.

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Mixed Oxygen Ionic and Electronic Conducting Membrane Reactors for Pure Chemicals Production

Wang

Liang

Xiang

et al. 2021

Chemie Ingenieur Technik

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Dedicated to Prof. Dr. rer. nat. Ju ¨rgen Caro on the occasion of his 70th birthday Traditional gas separation technologies to produce pure oxygen, hydrogen and highly concentrated nitrogen, such as pressure swing adsorption and cryogenic separation, are cost and energy intensive. The mixed oxygen ionic and electronic conductor (MIEC) membrane can separate oxygen with 100 % selectivity, which can be applied as a platform reactor for pure chemicals production. In the MIEC membrane reactor, pure O 2 can be directly produced. When the oxygen is all removed, highly concentrated N 2 is generated. Moreover, if the feeding gas is water steam, hydrogen can be yielded through water decomposition. Significant progress has been made in the MIEC membrane reactor for pure chemicals production over the past few years. Therefore, this work summarizes the relative efforts on MIEC membranes for oxygen, nitrogen, and hydrogen purification. The principles of materials selection, membrane morphology optimizing, and reactions coupling are discussed in detail.

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

Cited by 19 publications

References 71 publications

Mechanical reliability of Ce_0.8Gd_0.2O₂₋_δ‐FeCo₂O₄ dual phase membranes synthesized by one‐step solid‐state reaction

Mechanical reliability of Ce_0.8Gd_0.2O₂₋_δ‐FeCo₂O₄ dual phase membranes synthesized by one‐step solid‐state reaction

Advances in Electrochemical and Catalytic Performance of Nanostructured FeCo₂O₄ and Its Composites

Mixed Oxygen Ionic and Electronic Conducting Membrane Reactors for Pure Chemicals Production

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

Cited by 19 publications

References 71 publications

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

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

Advances in Electrochemical and Catalytic Performance of Nanostructured FeCo2O4 and Its Composites

Mixed Oxygen Ionic and Electronic Conducting Membrane Reactors for Pure Chemicals Production

Contact Info

Product

Resources

About

Mechanical reliability of Ce_0.8Gd_0.2O₂₋_δ‐FeCo₂O₄ dual phase membranes synthesized by one‐step solid‐state reaction

Mechanical reliability of Ce_0.8Gd_0.2O₂₋_δ‐FeCo₂O₄ dual phase membranes synthesized by one‐step solid‐state reaction

Advances in Electrochemical and Catalytic Performance of Nanostructured FeCo₂O₄ and Its Composites