Preparation of barium titanate–polypyrrole compositions and their electrical properties

and Their Electrical PropertiesVarious highly conducting polymers have been developed, arousing a great deal of experimental and theoretical interest.However, the dielectric properties of these products have not been investigated extensively.Some studies on doped polyacetylene have been reported?-3Legros et al !showed, recently, that the relative permittivity of oxidized polypyrrole is comparatively high (a.100 at 1 MHz).Great interest is attached to the preparation of the composite dielectric materials derived from the conducting polymer.In this paper, we carried out the polymerization of pyrrole on the surface of barium titanate for the purpose of the application to semicondudive dielectric materials.Barium titanate with an average size of 1 pm (HBT-3) was purchased from the Fuji Titanium Co., and dried at 60°C for 6 h in vacuum before me.Pyrrole monomer and methyl alcohol were