Investigation of the less oxygen deficient SrFeO3-δ

Abstract

Perovskite type SrFeO3 is a suitable candidate for gas sensors and catalytic applications. It is very difficult to stabilize the stoichiometric SrFeO3, which is highly unstable because of the presence of Fe 4+ ions that leads to the oxygen vacancies (δ) in order to maintain charge equilibrium. For δ=0, 0.13, 0.27 and 0.5, it takes SrFeO3, SrFeO2.87, SrFeO2.73 and SrFeO 2.5 phases respectively. The oxygen vacancy plays an important role in determining its structural and electronic properties. Nanocrystalline SrFeO3 has been prepared by thermal decomposition method and its structural, morphological, magnetic and electrical properties are analyzed. © 2011 American Institute of Physics.