Ceramic and transport properties of halogen-substituted STRONTIUM FERRITE (cas 12023-91-5)

Add time:07/27/2019    Source:sciencedirect.com

An attempt of fluorine and chlorine substitution for oxygen in strontium ferrite SrFeO3–δ was undertaken in search of a new means of influence on the oxide properties. An uncontrollable removal of halogen-ions from oxides during synthesis was detected. Nevertheless, residual halogens were found to provide a notable impact on ion conductivity and oxide stability under reducing conditions. More than twice higher ion conductivity relative to SrFeO3–δ was recorded in materials with nominal compositions SrFeO2.8–δF0.2, SrFeO2.6–δCl0.4, and SrFeO2.4–δCl0.6. The strong effect of halogen addition on ceramic properties of oxides was revealed. While SrFeO3–δ was known for its poor sinterability, adding 0.2 mol of fluorine or chlorine during the synthesis of SrFeO3–δ was shown to result in successful obtaining gas-tight ceramics.

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