  The Poly(vinylidene fluoride)/CaCu3Ti4O12 (CCTO) nanocrystal composite films
(85nm) with relatively high dielectric permittivity (90 at 100Hz) were prepared
by the solution casting followed by spin coating technique. The structural, the
microstructural and the dielectric properties of the composites were studied
using X-ray diffraction, Scanning Electron Microscope, and Impedance analyzer
respectively. The effective dielectric permittivity of the composite increased
with increase in the volume fraction of CCTO at all the frequencies (100 Hz to
1MHz) under investigation. The room temperature dielectric permittivity which
is around 90 at 100Hz, has increased to about 290 at 125oC (100Hz). These
results may be exploited in the development of high energy density capacitors.

Materials Science