SrFe12O19 as an impurity in perovskite-type ferrites

Shamsutov, I.V.; Merkulov, O.V.; Патракеев, М.В.

doi:10.1016/j.matlet.2020.128753

Cited by 12 publications

(4 citation statements)

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“…The reagent proportions were calculated for Sr 1.01– x Ce x FeO 3–δ in order to reliably avoid possible excess of iron with respect to the number of cations in A-sublattice. Such excess can favor the formation of SrFe 12 O 19 impurity, the presence of which in the oxide even in the amounts below 1 wt % was shown to distort the results of oxygen content measurements, making them inapplicable for the analysis of defect equilibrium. , …”

Section: Methodsmentioning

confidence: 99%

“…Such excess can favor the formation of SrFe 12 O 19 impurity, the presence of which in the oxide even in the amounts below 1 wt % was shown to distort the results of oxygen content measurements, making them inapplicable for the analysis of defect equilibrium. 23,24 The oxygen content versus oxygen partial pressure in a gas phase was measured by coulometric titration. A description of the procedures related to material synthesis, its structural characterization, ceramics fabrication, and oxygen content measurement can be found in a previous paper.…”

Section: Methodsmentioning

confidence: 99%

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Impact of Cerium Content on Ion and Electron Transport in Sr_1–xCe_xFeO_3–δ

et al. 2021

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The electrical conductivity of perovskite-type Sr1–x Ce x FeO3–δ (x = 0.05, 0.10, and 0.15) was measured in the range of oxygen partial pressure from 10–19 to 0.5 atm at temperatures 750–950 °C. The results were analyzed using the concentration of iron and cerium ions in different oxidation states derived from the p O2 –T–δ diagrams of these compositions by thermodynamic analysis of defect equilibrium. Three models assuming different involvements of cerium and iron in electron transport in addition to hole and oxygen-ion conductivity were used for the simulation of electrical conductivity data. The best fit to the experimental data was obtained in the model, suggesting a minor contribution of electrons localized on cerium ions to conductivity via a separate network with low carrier mobility. The averaged mobility values for holes, electrons, and oxygen ions can be indicated for all compositions as 0.04, 5 × 10–3, and 1 × 10–5 cm2 V–1 s–1 with activation energies of 0.17, 0.5, and 0.7 eV, respectively. An increase in the cerium content in Sr1–x Ce x FeO3–δ from 0.05 to 0.15 was found to result in an almost 10-fold decrease in ion conductivity, which is attributed to a decrease in the mobility of oxygen ions, whereas it has an insignificant effect on hole and electron conductivity.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Impact of Cerium Content on Ion and Electron Transport in Sr_1–xCe_xFeO_3–δ

et al. 2021

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“…4 reveal a series of reductive decompositions with the main products of Fe 3 O 4 , Fe 1Àx O, and metal Fe in ranges I, II and IV, respectively, whereas range III reflects the oxygen content variation in Fe 1Àx O oxide. 30 One can see that at least the stepwise falls in ranges II and IV in Fig. 4 are clearly imprinted on the coulometric titration results of La 0.5 Sr 0.5 Fe 0.9 Mo 0.1 O 3Àd in Fig.…”

Section: Structure Of the Oxidementioning

confidence: 81%

Exploring the defect equilibrium and charge transport in electrode material La_0.5Sr_0.5Fe_0.9Mo_0.1O_3−δ

Markov

Nikitin

Merkulov

et al. 2022

Phys. Chem. Chem. Phys.

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“…[1,2]. The properties of strontium ferrite can differ depending on the composition [3]. Nanostructured materials based on strontium ferrite are produced in various ways, e.g., microemulsion [4], sol-gel [5], coprecipitation [6], hydrothermal [7], combined hydrothermal and microwave [8], and sonochemical methods [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hollow Spherical Particles of Strontium Ferrite SrFe12O19 by Spray-Pyrolysis

et al. 2021

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The synthesis of hollow nanostructured microspheres of strontium ferrite by microspheres is reported. The phase composition, morphology, and particle-size distribution of the obtained microspheres and the effect of the synthesis parameters on the morphology and particle-size distribution are investigated. It is established that synthesis by the spray-pyrolysis method formed hollow nanostructured microspheres with dimensions in the range 0.5 -10.0 mm. The wall thickness was ~100 nm. The microspheres consisted of particles 10 -20 nm in size.

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SrFe12O19 as an impurity in perovskite-type ferrites

Cited by 12 publications

References 14 publications

Impact of Cerium Content on Ion and Electron Transport in Sr_1–xCe_xFeO_3–δ

Impact of Cerium Content on Ion and Electron Transport in Sr_1–xCe_xFeO_3–δ

Exploring the defect equilibrium and charge transport in electrode material La_0.5Sr_0.5Fe_0.9Mo_0.1O_3−δ

Preparation of Hollow Spherical Particles of Strontium Ferrite SrFe12O19 by Spray-Pyrolysis

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SrFe12O19 as an impurity in perovskite-type ferrites

Cited by 12 publications

References 14 publications

Impact of Cerium Content on Ion and Electron Transport in Sr1–xCexFeO3–δ

Impact of Cerium Content on Ion and Electron Transport in Sr1–xCexFeO3–δ

Exploring the defect equilibrium and charge transport in electrode material La0.5Sr0.5Fe0.9Mo0.1O3−δ

Preparation of Hollow Spherical Particles of Strontium Ferrite SrFe12O19 by Spray-Pyrolysis

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Product

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Impact of Cerium Content on Ion and Electron Transport in Sr_1–xCe_xFeO_3–δ

Impact of Cerium Content on Ion and Electron Transport in Sr_1–xCe_xFeO_3–δ

Exploring the defect equilibrium and charge transport in electrode material La_0.5Sr_0.5Fe_0.9Mo_0.1O_3−δ