Morphology controllable synthesis of Ba(Ti0˙9Zr0˙1)O3 nanoparticles by low temperature aqueous coprecipitation method

AbstractSingle phase Ba(Ti0˙9Zr0˙1)O3 nanoparticles have been synthesised by a low temperature aqueous coprecipitation method without any dispersant or further thermal treatment. Ba(Ti0˙9Zr0˙1)O3 nanoparticles with different particle sizes and morphology were synthesised at 65 or 85°C under ambient condition. Based on XRD patterns and field emission scanning electron microscopy images, the particle sizes decrease with the increase in the solution concentration. In addition, the morphology of the particles changes from coral-like to sphere-like with the increase of the solution concentration under constant stirring, and the critical concentration decreases with the increase in temperature, but the particles remain sphere-like when there is no mechanical agitation. The morphology transition behaviour can be understood by the different nucleation modes in the presence or absence of mechanical agitation, which was verified by the high resolution TEM images.