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000902341 1001_ $$0P:(DE-Juel1)174435$$aFischer, Liudmila$$b0$$ufzj
000902341 245__ $$aPhase formation and performance of solid state reactive sintered Ce 0.8 Gd 0.2 O 2− δ –FeCo 2 O 4 composites
000902341 260__ $$aLondon [u.a.]$$bRSC$$c2022
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000902341 520__ $$aReactive sintering of dual phase composites for use as oxygen transport membranes is a promising method enabling lower sintering temperatures as well as low-cost raw materials. Ce0.8Gd0.2O2−δ–FeCo2O4 composites with different nominal weight ratios from 60 : 40 to 90 : 10 are processed by reactive sintering of commercial Ce0.8Gd0.2O2−δ, Fe2O3, and Co3O4 powders. The phases formed in situ during sintering are investigated qualitatively and quantitatively by means of XRD and Rietveld refinement as well as transmission electron microscopy. Besides gadolinia-doped ceria, two Fe/Co-spinel phases are in equilibrium in agreement with the phase diagram. Moreover, a donor-doped GdFeO3-based perovskite (Gd,Ce)(Fe,Co)O3 showing electronic conductivity is formed. Due to these intense phase reactions, the composition of each individual phase is assessed for all composites and their functional properties are discussed. The oxygen permeation performances of the composites are measured including their dependence on temperature and the potential limiting steps are discussed. The results reveal that the phase reactions support the formation of the desired mixed ionic electronic conductivity achieving percolation at low nominal spinel contents. The specific microstructure plays an extremely important role in the membrane performance and, thus, special attention should be paid to this in future research about dual phase membranes.
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000902341 536__ $$0G:(DE-HGF)POF4-5353$$a5353 - Understanding the Structural and Functional Behavior of Solid State Systems (POF4-535)$$cPOF4-535$$fPOF IV$$x1
000902341 536__ $$0G:(GEPRIS)387282673$$aDFG project 387282673 - Die Rolle von Grenzflächen in mehrphasigen Ceroxid-basierten Membranen für den Einsatz in Membranreaktoren $$c387282673$$x2
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000902341 7001_ $$0P:(DE-Juel1)181017$$aNeuhaus, Kerstin$$b1$$ufzj
000902341 7001_ $$0P:(DE-Juel1)185885$$aSchmidt, Christina$$b2$$ufzj
000902341 7001_ $$0P:(DE-Juel1)174238$$aRan, Ke$$b3
000902341 7001_ $$0P:(DE-Juel1)176603$$aBehr, Patrick$$b4$$ufzj
000902341 7001_ $$0P:(DE-Juel1)129587$$aBaumann, Stefan$$b5$$eCorresponding author
000902341 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b6$$ufzj
000902341 7001_ $$0P:(DE-Juel1)144923$$aMeulenberg, Wilhelm A.$$b7
000902341 773__ $$0PERI:(DE-600)2702232-8$$a10.1039/D1TA05695F$$gp. 10.1039.D1TA05695F$$p 2412-2420 $$tJournal of materials chemistry / A$$v10$$x2050-7496$$y2022
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