Preparation of SrVO3 by annealing of Sr2V2O7 in a reducing atmosphere

Abstract

This study focuses on the synthesis of SrVO₃ through the reduction of Sr₂V₂O₇ by annealing in a reducing atmosphere. The effects of annealing temperature and annealing duration on Sr₂V₂O₇ were investigated. The X-ray powder diffraction pattern showed that stoichiometric changes to Sr₂V₂O₇ were achieved only at an elevated annealing temperature of 1000 °C in a reducing atmosphere, and that the desired SrVO₃ was obtained only after 144 h of annealing. Further investigation of SrVO₃ was performed using X-ray photoelectron spectroscopy, which confirmed that the reduction of V⁵⁺ found in Sr₂V₂O₇ to V⁴⁺ found in SrVO₃ was achieved.