Preparation,Characterization and Low Frequency a.c.Conduction of Polypyrrole-Lead Titanate Composites

摘要

Conducting Polypyrrole-lead titanate(PPy/PbTiO3)composites have been prepared by in situ deposition technique by placing different wt.% of fine grade powder of PbTiO3(10,20,30,40,and 50%)during polymerization of pyrrole.The composites formed were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),and thermogravimetric analysis(TGA),and these data indicate that PbTiO3 particles are dominating with an increase in crystallinity as well as thermal stability of the composites.The results on the low frequency dielectric studies which are obtained in the form of pressed pellet state are interpreted in terms of Maxwell Wagner polarization,which are responsible for the dielectric relaxation mechanism and frequency dependence of conductivity.