Low-temperature synthesis under low oxygen pressure and thermodynamic properties of YbFe 2 O 4-δ

L. B. Vedmid'; V. M. Dimitrov; O. M. Fedorova

doi:10.15826/chimtech.2018.5.1.03

Low-temperature synthesis under low oxygen pressure and thermodynamic properties of YbFe₂O_4-δ

L. B. Vedmid', V. M. Dimitrov, O. M. Fedorova

Abstract

The mixed-valence compound YbFe₂O_4-_d was synthesized using a modified method that allows employing gaseous atmosphere with a controlled ratio of inert gas and oxygen. The stability range for YbFe₂O_4-d was determined at 1090 °C under reducing conditions. Thermodynamic characteristics for the formation of YbFe₂O_4-d from the simple oxides and from elements in the temperature range 700-910 °C have been calculated. The obtained results allow specifying the low-temperature part of Р-Т-Х diagram for the Yb-Fe-O system.

Keywords

oxygen partial pressure; mixed valency; thermodynamic properties of complex oxides; oxygen non-stoichiometry

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References

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DOI: https://doi.org/10.15826/chimtech.2018.5.1.03

Copyright (c) 2017 L.B.Vedmid’, V.M. Dimitrov, O.M. Fedorova

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