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Synthesis and electrical properties of doped polypyrole withhexagonal ferrite

This paper is available in a repository.
This paper is available in a repository.

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Abstract

The alternate current (ac) and direct current (dc) electrical conductivity of polypyrrole doped with strontium hexaferritecompositehas been investigated at different temperatures in the frequency range of 100 Hz to 1 MHz.A conducting polymer, Polypyrrole wassynthesizedbychemical polymerization method and doped with dodecylbenzenesulphonic acid (PPy-DBSA). Y-type hexagonal ferrite Zn2Sr2Fe12O22was prepared bynormalmicroemulsion route. Composite was prepared by mixing the Zn2Sr2Fe12O22with already synthesized conducting polymer PPy-DBSA by 1:1 molar ratio. Phase analysis was performed by using X-ray diffraction (XRD) analysis. The microstructure was examined by scanning electron microscopy (SEM) showing heterogonous distribution of grains. The experimental results showed that the DC electrical conductivity of the composite increased with increasing temperature more rapidly as compared to that of pristine polypyrrole. Activation energy, density of states and hopping length were calculated and found to be influenced by adding ferrites. AC electrical conductivity of the composite are changed with temperature and frequency of applied electric field.