Phase Formation, Crystal Structure and Ion Conductivity of Silver Antimonate-Molybdates

The features of the formation of compounds based on silver antimonate obtained in the AgNO₃-Sb₂O₃-MoO₃ system by the solid-phase reaction were investigated. For a synthesis temperature of 1023 K, a homogeneous concentration region of the Ag_2-xSb_2-xMo_xO₆ solid solution with a structure of the defective pyrochlore type in the range of 0.0 ≤ x ≤ 2.0 was detected. The Rietveld method, within the constraints of the Fd-3m space group, was used to refinement of X-ray diffraction data, specify the structural parameters of powders, and the correlation of structural disorder with their electrically conductive properties. Relative density and average particle size for ceramic samples sintered at 1223 K were determined using scanning electron microscopy.