Synthesis and dielectric studies of poly (vinyl pyrrolidone) / titanium dioxide nanocomposites

International Conference on Materials Science and Technology 2012

Vasudevan, Prathibha^1 ; Thomas, Sunil^1 ; Arunkumar, K.V.^1 ; Karthika, S.^1 ; Unnikrishnan, N.V.^1

School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerala

686 560, India^1

关键词: AC electrical conductivity;    Dielectric response;    Dielectric studies;    High frequency HF;    Impedance spectroscopy;    Poly vinyl pyrrolidone;    Sol-gel technique;    TiO2 nano-particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/73/1/012015/pdf
DOI  :  10.1088/1757-899X/73/1/012015

来源: IOP

【 摘 要 】

In this paper, we present the synthesis of poly vinyl pyrrolidone (PVP) / titanium dioxide nanocomposites via sol- gel technique. The structural and dielectric properties of the samples were also analysed in this work. PVP doped with varying concentrations of TiO2 are prepared by the sol-gel route. The prepared composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and impedance spectroscopy. XRD and TEM confirm the presence of TiO2 nanoparticles in the composites. The dielectric response and the AC electrical conductivity of the samples are investigated for the frequency range 1 kHz-2MHz at room temperature. The dielectric studies show low values for dielectric constant and loss at high frequencies.