Characteristics of BaNd2Ti5O14 powders directly prepared by high-temperature spray pyrolysis

BaNd2Ti5O14 powders were directly prepared by high-temperature spray pyrolysis. The powders prepared at temperatures of 1300 and 1500 °C exhibited a pure BaNd2Ti5O14 phase. The powders prepared at 1300 °C were spherical in shape. However, the powders prepared at 1500 °C showed non-spherical shapes. The BaNd2Ti5O14 powders had a composition similar to that of the spray solution. The mean sizes of the BaNd2Ti5O14 powders increased from 0.23 to 0.60 μm when the concentration of the spray solution was increased from 0.01 to 0.2 M. At a sintering temperature of 1100 °C, bridge-like structures were formed between the powders. Pellets sintered at 1300 °C exhibited a dense structure comprising rod-like crystals.