Abstract:
Silicone rubber composites filled with Ba(Zn1/3Ta2/3)O3 (BZT) were prepared by hot pressing and the
effect of filler content on the microwave dielectric, mechanical and thermal properties as well as on
moisture absorption were investigated. The observed relative permittivity (er) was compared with
different theoretical models. Among the different theoretical models Jayasundere Smith and Modified
Lichtenecker were in good agreement with experimental values of er. The study of the mechanical
property showed that the silicone rubber – BZT composites were flexible and stretchable. The coefficient
of thermal expansion and specific heat capacity decreased whereas thermal conductivity, thermal
diffusivity and the moisture absorption increased with increase in filler loading.
