Dielectric properties of barium-titanate sintered from tribophysically activated powders

It has been well known that the tribophysical (mechanical) activation could be used as a method for modification of physicochemical properties of dispersed systems such as polycrystalline mixture of oxides. In this study, we consider the properties of BaTiO 3 obtained from tribophysically activated initial powders. The mixture of 50 mol% BaCO 3 and 50 mol% TiO 2 powders was tribophysically activated in high energy vibromill during 0, 3, 30, 90 and 180 min, calcinated at 800°C for 1 h and reaction sintered at 1100, 1200 and 1300°C for 2 h. The surface specific areas, densities (green and sintered), phase compositions and dielectric properties were evaluated.