A new method to deagglomeration of PbTiO3 ultrafine powders

An innovative method for deagglomeration of ultrafine powders was developed in this paper. The method was based on electrohydraulic forces produced by electric breakdown discharge between two electrodes submerged in liquid. By controlling the process parameters (voltage, electrode separation and reaction time), PbTiO₃ ultrafine powders with spherical, tabular and aciculate shape were successfully deagglomerated. Two ways based on centrifugal sedimentation and laser-light scattering were used to determine the particle size distribution. Scanning electron microscope (SEM) images showed that the agglomeration of PT powders was greatly reduced.