FABRICATION AND CHARACTERIZATION OF HIGH PERMITTIVITY CERAMICS IN THEBA(T1-X-YSNXZRY)O3 SYSTEM

Ceramics of solid solution compositions in the system BaTi1-x-ySnxZryO 3 have been fabricated using conventional mixed oxide processing route s. Samples with y = 0 or 0.01 exhibited maximum relative permittivitie s, epsilon(r)max of approximately 65 000 and approximately 62 000 resp ectively. The Curie peaks became broader and epsilon(max)r decreased w ith increasing zirconium substitutions. The Curie temperature decrease d linearly from 35-degrees-C for y = 0 to -40-degrees-C for y = 0.11: for the latter, epsilon(r)max was equal to approximately 20000. The re sults are interpreted on the basis of microstructural features and on the degree of compositional inhomogeneity in the system.