Dielectric spectroscopy of polyaniline-Dy2O3 composites

Insitu polymerization of aniline was carried out in the presence of dysprosium oxide (Dy2O3) to synthesize Polyaniline (PANI)-Dy2O3 composites by the chemical oxidation method. The PANI/Dy2O3 composites were synthesized with various compositions viz., 10, 20, 30, 40 and 50 wt% of Dy2O3 in PANI. AC conductivity was studied in the frequency range 102-107 Hz. It is observed that AC conductivity achieved its maximum value for 40 wt% of Dy2O3 in PANI. The dielectric behavior is also investigated in the frequency range 102-107 Hz at room temperature. It is found that at 10 KHz frequency the 40 wt% composite shows maximum dielectric values. The dimensions of Dy2O3 particles in the matrix have a greater influence on the conductivity values and observed dielectric values.