Synthesis of oxide-based materials with a brownmillerite structure of the CaO‒Bi 2 O 3 ‒Fe 2 O 3  system

N. A. Lomanova

doi:10.17073/1683-4518-2020-4-36-40

Synthesis of oxide-based materials with a brownmillerite structure of the CaO‒Bi₂O₃‒Fe₂O₃ system

N. A. Lomanova

https://doi.org/10.17073/1683-4518-2020-4-36-40

Full Text:

Abstract

The single-phase material based on the complex oxide Ca₂Fe₂O₅ doped with bismuth was synthesized by glycine-nitrate combustion. Characterization by X-ray diffractometry, helium pycnometry, scanning electron microscopy, and elemental analysis showed that the material is isostructural to brownmillerite. According to the results of complex thermal analysis together with mass spectrometry, the optimum temperature for the synthesis of the material is about 650 °C and it has thermal stability in a wide temperature range. Using the dilatometry method, the sintering temperature and the thermal expansion coefficient of the material are determined.

Keywords

materials of the CaO‒Bi₂O₃‒Fe₂O₃ system, glycine-nitrate combustion, calcium ferrite, brownmillerite structure,

About the Author

N. A. Lomanova

ФГБУН «Физико-технический институт имени А. Ф. Иоффе»
Russian Federation

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Supplementary files

For citation: Lomanova N.A. Synthesis of oxide-based materials with a brownmillerite structure of the CaO‒Bi₂O₃‒Fe₂O₃ system. NOVYE OGNEUPORY (NEW REFRACTORIES). 2020;(4):36-40. https://doi.org/10.17073/1683-4518-2020-4-36-40

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Synthesis of oxide-based materials with a brownmillerite structure of the CaO‒Bi2O3‒Fe2O3 system