Synthesis and Investigation of Novel Composite Materials Based on the CaO–Bi2O3–Fe2O3 System

Abstract

The results of the study of novel composite solid electrolytes based on the CаO–Bi₂O₃–Fe₂O₃ system are presented. These materials have a mixed electronic-ionic conductivity which increases with the growth of the Fe₂O₃ content. In the (СаO)_0.26(Bi₂O₃)_0.74–Fe₂O₃ section, a part of the oxygen-ionic component increases with an increase in the Fe₂O₃ content and, in contrast, the oxygen conductivity decreases in the (СаO)_0.2(Bi₂O₃)_0.8–BiFeO₃ section. These materials are interesting in terms of their use as elements of electrochemical devices, for example, in solid oxide fuel cells, electrolyzers for obtaining extra pure gases (oxygen, hydrogen), and electrochemical oxygen sensors.