Microwave Dielectric Relaxation in Binary Mixtures of 1, 3-Diaminopropane in Dimethylaminoethanol. Issue 205 (12th February 2020)

• Record Type: Journal Article
• Authors: Undre, P. B.; Deshmukh, M. L.; Londhe, C. T.; Khirade, P. W.
• Is Part Of: Integrated ferroelectrics. Issue 205(2020)
• Page Start: 164
• Page End: 176
• Publication Date: 2020-02-12
• Subjects: Dielectric dispersion -- dielectric loss -- excess parameters -- Kirkwood correlation factor -- thermodynamic parameters; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2019.1675012
• Languages: English
• ISSNs: 1058-4587

Abstract

Abstract: The dielectric dispersion ε ′ and dielectric loss ε ″ of binary mixture of 1, 3-diaminopropane-N, N-dimethylaminoethanol were measured by employing the time domain reflectometry technique over a frequency range 10 MHz to 20 GHz at 288 K, 298 K, 308 K, and 318 K. To evaluate various dielectric parameters, the frequency dependents complex permittivity ( ε * ( ω ) = ε ′ – jε ″) data viz., dielectric constant ( ε 0 ), relaxation time ( τ ), and permittivity at high frequency ( ε ∞ ) were fitted by the nonlinear least-squares fit method to Debye expression. Temperature dependent ε 0, τ, Kirkwood correlation factor ( g eff ), and free energy of activation (Δ G ) have been determined and discussed in terms of the effect of -NH2 and -CH3 side-group on molecular dynamics and intermolecular hydrogen bonds.