Dielectric energy storage densities in Ba1-xSrxTi1-yZryO3 ceramics

This paper presents measurements of the Weiss temperature, the Curie constant, the spontaneous polarization and the stored dielectric energy density of Ba1-xSrxTi1-yZryO3 ceramics for compositions with 0 less than or equal tox less than or equal to1 and 0 less than or equal toy less than or equal to0.5. The first three of these dielectric parameters are used to predict the density of energy storage that can be obtained when ceramics of these compositions are used as capacitor dielectrics. These predictions are compared with direct measurements of energy densities which show that for moderate electric field strengths (-50 kV mm(-1)) the stored dielectric energy densities were the largest for ceramics with x >0.7 and y similar to0.2. (C) 2000 Kluwer Academic Publishers.