Degree of phase transformations in the conditions of polythermal synthesis of SrBaFeMoO6–δ

Nikolay Kalanda*, Marta Yarmolich, Maksim Kutuzau, Alexander Gurskii, Maria do Rosário Teixeira Soares, Mindaugas Andrulevičius, Brigita Abakevičienė, Sigitas Tamulevičius

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The sequence of phase transformations during the crystallization of SrBaFeMoO6–δ by the solid-phase technique from a stoichiometric mixture of simple oxides SrCO3 + BaCO3 + 0.5Fe2O3 + MoO3 was studied. It has been established that the synthesis of barium – strontium ferromolybdate proceeds through a series of sequential - parallel stages. It was found that to minimize the effect of intermediate reaction products, it is necessary to use combined synthesis modes. As a result of using combined synthesis modes for annealing for 20 h and T = 1443 K in vacuum of 10−5 Torr at the pressure of residual oxygen gas 10−8 Pa, it was possible to obtain a single-phase barium – strontium ferromolybdate compound with superstructural ordering of iron and molybdenum cations.

Original languageEnglish
Article number109196
JournalVacuum
Volume174
ISSN0042-207X
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Differential thermal analysis
  • Double perovskite
  • Magnetic metal oxide compound
  • Polythermal synthesis
  • Sequence and degree of phase transformations
  • Thermogravimetric analysis

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