Abstract:
The ferroelectric properties of the Ba0.6Sr0.4TiO3 system prepared at 1250, 1350 and 1450 degrees C sintering temperatures for up to 4 h, are studied through the measurements of the hysteresis loops at different temperatures and at a constant field of 40 kV/m. Grain size analysis was performed with a scanning electron microscope (SEM) with a statistical method, The dielectric properties of the samples are reported as a function of temperature for the different sintering conditions. The dielectric permittivity and the remanent polarization are correlated to the grain size distributions obtained by SEM. A derivative process of the remanent polarization is used to analyze the phase transitions as the temperature is varied. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.