Molten salt synthesis and phase evolution of Ba(Cd1/3Nb2/3)O3

Abstract

Abstract Ba(Cd1/3Nb2/3)O3 powder with an octahedral shape stacked by small particles was successfully synthesized by the molten salt synthesis method at a low temperature of 850 °C, which was much lower than the columbite method, two-step solid-state reaction process. Thermogravimetry and differential thermal analysis curves combined with X-ray diffraction analysis determined the phase evolution of Ba(Cd1/3Nb2/3)O3 powder at relative high temperature. Furthermore, Raman results showed that the Ba(Cd1/3Nb2/3)O3 powder had a trigonal order structure. It was indicated that the “template formation mechanism” and crystal habit growth which obeyed the model of anion coordination polyhedral, play an important role in the formation and growth processes. The resulting ceramics exhibited favorable dielectric properties.