BaTiO3 is studied as a typical ferroelectric material with high
dielectric permittivity, low dielectric loss and other excellent
ferroelectric properties[1]. Owing to the outstanding properties,
BaTiO3 has been widely applied in capacitors, sensors, nonvolatile
random access memory and many composites[2]. With their high
intrinsic dielectric permittivities, the nanostructured BaTiO3 particles,
such as spheres[3] or fibers[4], have also been employed as
dielectric fillers in polymer composites to improve the dielectric
behavior of the composites. The dielectric as well as geometric
(size, shape etc) properties of the BaTiO3 particles play a critical
role in determining the dielectric behavior of the polymer composites[5,6].
There have also been efforts in making three-phase
polymer composites filled with both BaTiO3 particles and
conductive fillers. The presence of BaTiO3 nanoparticles prevents
the conductive fillers from connecting into conducting paths,
giving rise to lower dielectric loss. Our recent results show that a