Synthesis of La-doped CaTiO3 perovskite powders from the mixture of metal salt solutions by ultrasonic mist combustion/pyrolysis processes

Abstract

The CaTiO3 and La-doped CaTiO3 [Ca1-x (La)(x) TiO3, x = 0.05-0.3] powders were prepared from aqueous solutions by the ultrasonic mist pyrolysis and ultrasonic mist combustion processes. Glycine provides carboxylic acid and amine groups as a fuel in the ultrasonic mist combustion process. In ultrasonic mist pyrolysis, the particles with hollow sphere morphology were obtained; whereas, particles prepared by the ultrasonic mist combustion process had a dense solid morphology with low porosity. The ultrasonic mist combustion process using metal nitrates and glycine as the fuel for a starting material has proved to be a simple and unique approach to preparing dense CaTiO3 powder and a solid solution of CaTiO3 with lanthanum.