Phase equilibria in the Y–Ba–Fe–O system

Urusova, A.S.; Bryuzgina, A. V.; Mychinko, Mikhail; Mordvinova, Natalia E.; Lebedev, Oleg I.; Caignaert, V.; Kiselev, E.A.; Аксенова, Т. В.; Черепанов, В.А.

doi:10.1016/j.jallcom.2016.10.023

Cited by 15 publications

(9 citation statements)

References 42 publications

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“…The phase equilibria in the 1/2Y 2 O 3 –1/2Fe 2 O 3 system were discussed in detail in our recent paper . Two single‐phase complex oxides were confirmed to exist at 1373 K in air: YFeO 3 with the orthorhombically distorted perovskite structure (sp.…”

Section: Resultsmentioning

confidence: 94%

“…A comparison of 1/2Y 2 O 3 –MO–1/2Fe 2 O 3 phase diagrams for M = Ca and M = Sr (present work) shows that phase equilibria in the Ca‐ and Sr containing systems are generally similar, although the homogeneity ranges of solid solutions are wider for the latter system. In contrast, the substitution of Ba for Sr completely changes the phase equilibria due to the increased size difference between Ba 2+ and Y 3+ ions

r_{{normalBa}^{2 +}}^{CN 12} - r_{{normalY}^{3 +}}^{CN 9}

= 1.61−1.075 = 0.535 Å …”

Section: Resultsmentioning

confidence: 99%

“…The information concerning small‐sized rare earth‐ or yttrium‐based ferrites is limited, although undoped strontium ferrite and yttrium ferrite have been the objects of wide‐ranging studies as magnetic and membrane materials in the last few decades . The wide variety of specific features of phase formation in the related systems and significant differences in the phase diagrams of these systems require detailed study of each system, in particular Y 2 O 3 –SrO–Fe 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Summarizing the aforementioned data, one can conclude that the phase equilibria in the Y 2 O 3 –SrO–Fe 2 O 3 system are unclear, and the available information about the homogeneity range in a Sr x Y 1− x FeO 3−δ solid solution is contradictory (the values of x = 0.25 and 0.5 obtained in [] lie outside of the range 0.71 ≤ x ≤ 0.91 reported in []). Therefore, the aims of present work are: (a) the determination of homogeneity ranges and the crystal structure of the solid solutions formed in the 1/2Y 2 O 3 –SrO–1/2Fe 2 O 3 system; (b) the characterization of oxygen content in the obtained solid solutions and determination of its changes with temperature; (c) the determination of thermal expansion for the obtained solid solutions; (d) establishing the phase equilibria in the 1/2Y 2 O 3 –SrO–1/2Fe 2 O 3 system and a comparison of the obtained phase diagram with the related 1/2Ln 2 O 3 –SrO–1/2Fe 2 O 3 (Ln = Nd, La) and 1/2Y 2 O 3 –MO–1/2Fe 2 O 3 (M = Ca, Ba) systems.…”

Section: Introductionmentioning

confidence: 99%

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Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y₂O₃–SrO–1/2Fe₂O₃ system

et al. 2018

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Phase equilibria in the 1/2Y 2 O 3 -SrO-1/2Fe 2 O 3 system were systematically studied at 1373 K in air. The homogeneity ranges and crystal structure of the solid solutions Sr 1−x Y x FeO 3−δ with 0.875 ≤ x ≤ 1 (sp. gr. Pnma) and 0.05 ≤ x ≤ 0.25 (sp. gr. Pm3 m) and Sr 3−z Y z Fe 2 O 7−δ with 0 ≤ z ≤ 0.25 (sp. gr. I4/mmm) were determined by X-ray diffraction analysis of quenched samples. The structural parameters of the single-phase oxides were refined by the Rietveld profile method. The isothermal-isobaric phase diagram for the 1/2Y 2 O 3 -SrO-1/2Fe 2 O 3 system at 1373 K in air is presented. The changes of oxygen content in the solid solutions Sr 1−x Y x FeO 3−δ (0.05 ≤ x ≤ 0.25) and Sr 3−z Y z Fe 2 O 7−δ with 0 ≤ z ≤ 0.25 vs temperature in air were determined by the thermogravimetric analysis. Oxygen content was also calculated from the iodometric titration results. The gradual substitution of strontium by yttrium in Sr 1−x Y x FeO 3−δ (0.05 ≤ x ≤ 0.25) leads to a decrease in the oxygen content and the mean oxidation state of iron. The average thermal expansion coefficients for Sr 1−x Y x FeO 3−δ (0.875 ≤ x ≤ 1 and 0.05 ≤ x ≤ 0.25) and Sr 3−z Y z Fe 2 O 7−δ (0 ≤ z ≤ 0.25) were calculated within the temperature range 298-1373 K in air. K E Y W O R D S crystal structure, oxygen content, phase diagram, solid solution, thermal expansion, total electric conductivity, X-ray diffraction

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Section: Resultsmentioning

confidence: 94%

r_{{normalBa}^{2 +}}^{CN 12} - r_{{normalY}^{3 +}}^{CN 9}

= 1.61−1.075 = 0.535 Å …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y₂O₃–SrO–1/2Fe₂O₃ system

et al. 2018

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“…Since earlier Ba 3 SmFe 2 O 7.5 was obtained in argon 31 or in air but at significantly higher temperature, 32 we have checked the possibility for Ba 3 SmFe 2 O 7.5 synthesis at 1100°C in air.…”

Section: Resultsmentioning

confidence: 93%

Phase equilibria and stability of intermediate phases in the Sm₂O₃–BaO–Fe₂O₃ system

et al. 2021

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Phase equilibria in the ½ Sm2O3–BaO–½ Fe2O3 system were systematically studied at 1100°C in air. Two individual compounds: Sm1.875Ba3.125Fe5O15‐δ and Ba3SmFe2O7.5+δ have been detected in the studied system at 1100°C in air. One more complex oxide with double perovskite structure SmBaFe2O5+w has been obtained under reduced oxygen partial pressure. Thermodynamic stability of SmBaFe2O5+w and its thermal stability in metastable state in air were determined. The subsolidus phase diagram for the ½ Sm2O3 – BaO – ½ Fe2O3 system at 1100°C in air has been constructed.

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Fluorine-doped barium cobaltite perovskite membrane for oxygen separation and syngas production

Qiu

Liu

Tan

et al. 2020

Ceramics International

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Phase equilibria in the Y–Ba–Fe–O system

Cited by 15 publications

References 42 publications

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y₂O₃–SrO–1/2Fe₂O₃ system

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y₂O₃–SrO–1/2Fe₂O₃ system

Phase equilibria and stability of intermediate phases in the Sm₂O₃–BaO–Fe₂O₃ system

Fluorine-doped barium cobaltite perovskite membrane for oxygen separation and syngas production

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Phase equilibria in the Y–Ba–Fe–O system

Cited by 15 publications

References 42 publications

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y2O3–SrO–1/2Fe2O3 system

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y2O3–SrO–1/2Fe2O3 system

Phase equilibria and stability of intermediate phases in the Sm2O3–BaO–Fe2O3 system

Fluorine-doped barium cobaltite perovskite membrane for oxygen separation and syngas production

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Product

Resources

About

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y₂O₃–SrO–1/2Fe₂O₃ system

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y₂O₃–SrO–1/2Fe₂O₃ system

Phase equilibria and stability of intermediate phases in the Sm₂O₃–BaO–Fe₂O₃ system