• Microwave dielectric characterization of binary mixture of formamide with $N, N$-dimethylaminoethanol

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/068/05/0851-0861

• # Keywords

Time domain reﬂectometry; formamide; dimethylaminoethanol; excess parameters; Kirkwood correlation factor; Bruggeman factor; activation energy

• # Abstract

Dielectric relaxation measurements of formamide (FMD)–$N,N$- dimethylaminoethanol (DMAE) solvent mixtures have been carried out over the entire concentration range using time domain reﬂectometry technique at 25, 35 and 45° C in thefrequency range of 10 MHz to 20 GHz. The mixtures exhibit a principle dispersion of the Davidson–Cole relaxation type at microwave frequencies. Bilinear calibration method is used to obtain complex permittivity $\epsilon^{∗}(\omega)$ from complex reﬂection coefficient $\rho^{∗} (\omega)$ over the frequency range of 10 MHz to 10 GHz. The excess permittivity ($\epsilon^{E}$), excessinverse relaxation time $(1/\tau)^{E}$, Kirkwood correlation factor ($g^{eff}$), activation energy and Bruggeman factor ($f_{B}$) are also calculated to study the solute–solvent interaction.

• # Author Affiliations

1. Microwave Research Lab, Department of Physics, Dr. B.A.M. University, Aurangabad 431 004, India
2. Microwave Research Lab, Department of Physics, Deogiri College, Aurangabad 431 005, India
3. Department of Computer Science and Electronics, Dr. B.A.M. University, Aurangabad 431 004, India

• # Pramana – Journal of Physics

Volume 94, 2020
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019