Structural and electronic properties of polyaniline/yittrium oxide composites

Composites of polyaniline with yttrium oxide (Y₂O₃) have been synthesized by chemical polymerization method. The structural properties of synthesized Polyaniline (PANI) and PANI/Y₂O₃ were studied by X-ray diffraction (XRD) analysis. XRD pattern indicate that PANI is intercalated into the layers of Y₂O₃ successfully and therefore the degree of crystallinity increases due to crystalline of Y₂O₃. Fourier transform infrared (FT-IR) indicated that there is a strong interaction between PANI and Y₂O₃. Electronic properties (Dielectric and Conductivity) of PANI and PANI/Y₂O₃ composite have been investigated between frequency ranges of 1 MHz and 3.0 GHz. Higher dielectric constants and dielectric losses of PANI/Y₂O₃ composites than those of Synthesis PANI were found. As the content of Y₂O₃ increased, the dielectric constant and loss also increased. The value of dielectric constant (ε/) for all PANI/Y₂O₃ composite is very high at low frequency but decreases with the increases of frequency. PANI/Y₂O₃ composite materials with high dielectric constants are highly desirable for use in charge-storage devices.