Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Effect of synthesis conditions on the formation of Y3-xLaxFe5-yO12+δ/La1-xYxFe1-yO3 composite

O.I. Gyrdashova1, A.E. Stepanov2, S.V. Naumov3, S.N. Shkerin4

1 Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences
2 Ural Federal University named after the first President of B.N. Yeltsin
3 Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences
4 Institute of High-Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences

DOI: 10.26456/pcascnn/2022.14.583

Original article

Abstract: Glass-like composite materials with high oxygen conductivity values were obtained by growing from a homogeneous melt by the method of non-melting zone melting. A complex architecture of the composite is observed: the main phase is highly defective in cationic and anionic sublattices Y3-xLaxFe5-yO12+δ with a garnet structure, inside which the germination of filamentous crystals La1-xYxFe1-yO3 with a perovskite structure is observed. The effect of the method of synthesis of polycrystalline precursors used as raw materials for the production of the melt on the formation of the structure of composites La1-xYxFe1-yO3/Y3-xLaxFe5-yO12+δ is investigated. The composite obtained from the precursor formed by the formate method contains ~87 mol.% of the main phase.The composite obtained from the precursor formed by the self-propagating high-temperature synthesis is ~76 mol.% of the garnet phase. The obtained composites have a certain growth direction of the main phase Y3-xLaxFe5-yO12+δ <100>.

Keywords: yttrium ferrite, garnet structures, synthesis, precursors, morphology, composites, oxygen conductivity

  • Olga I. Gyrdashova – Ph. D., Leading Researcher, Laboratory of Inorganic Synthesis, Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences
  • Anton E. Stepanov – 4th year student, Institute of New Materials and Technologies, Ural Federal University named after the first President of B.N. Yeltsin
  • Sergey V. Naumov – Ph. D., Senior Researcher, Laboratory of Magnetic Semiconductors, Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences
  • Sergey N. Shkerin – Dr. Sc., Chief Researcher, Laboratory of Electrochemical Materials Science, Institute of High-Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences

Reference:

Gyrdashova, O.I. Effect of synthesis conditions on the formation of Y3-xLaxFe5-yO12+δ/La1-xYxFe1-yO3 composite / O.I. Gyrdashova, A.E. Stepanov, S.V. Naumov, S.N. Shkerin // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2022. — I. 14. — P. 583-592. DOI: 10.26456/pcascnn/2022.14.583. (In Russian).

Full article (in Russian): download PDF file

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