Temperature dependent Dielectric studies of Poly(Ethylene Oxide)

International Conference on Advances in Materials and Manufacturing Applications 2017

Shiva Kumar, B.P.^1 ; Gurumurthy, T.M.^2 ; Praveen, D.^1

Department of Physics, Amrita University, Bengaluru, India^1

Department of Physics, Vijaya Degree College, Bangalore University, Bangalore, India^2

关键词: Dielectric application;    Dielectric measurements;    Dielectric studies;    Fast switching;    High frequency HF;    Impedance spectroscopy;    Temperature dependent;    Very high frequency;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/310/1/012118/pdf
DOI  :  10.1088/1757-899X/310/1/012118

来源: IOP

【 摘 要 】

Polymers are known to be better materials for dielectric applications. Various polymers with different molecular weights are being studied for dielectric applications. In the present paper, we report the dielectric measurements of Poly(Ethylene Oxide) {PEO} using Impedance spectroscopy studies. The dielectric studies of PEO were carried out on pellets as a function of temperature. It was found that the dielectric constant seems to be negligibly varying with increase in temperature at high frequencies, however, at low frequencies, dielectric constant varies increases with temperature. This may be due to the fact that with the thermal energy provided to the system, more and more dipoles participate and hence the net dielectric constant of the material is also higher at higher temperature. Also at very high frequencies, due to many non-responsive dipoles for fast switching of the applied signal, net dielectric constant of the material also does vary much with temperatures.