Preparation mechanism of (Bi2O3)0.75(Dy2O3)0.25 nano-crystalline solid electrolyte

(Bi2O3)0.75(Dy2O3)0.25 nanopowder was prepared by reverse chemical titration co-precipitation method. The reaction mechanism during the precipitation process was discussed by thermodynamic analysis. Thermal decomposition behavior of the precursor was investigated using X-ray diffractometry and TG–MS analysis. The precursor was calcined at 500 °C for 3 h to obtain (Bi2O3)0.75(Dy2O3)0.25 nanopowder. Using the nanopowder, pellets with relative density higher than 94% were obtained at 700 °C for 2 h by pressureless sintering, and the grains remained at the nano-scale with size of 72 nm.