Hydrothermal Synthesis of a Novel Double Perovskite-type Oxide Ba(Sb~III, Sb~V )O_3

A novel double perovskite-type oxide Ba(SbⅢ 7 SbⅤ )O3 was synthesized by hydrothermal crystallization methods. The phase, morphology and particle size of the product were characterized by XRD, IR, SEM and ICP techniques. The results indicated that the Ba(SbⅢ,SbⅤ )O3 oxide shows a cubic perovskite-type structure with a cell parameter a=0.415nm, and has a paticle size in the range from 1 to 2 μm. The product has trivalent and pentavalent two states antimony ions. The influence of hydrothermal conditions exhibited that the optimum alkalinity and nSb(Ⅲ)/nSb(v ) are 8-10 mol/L KOH medium and 0-1 respectively.