Dielectric relaxation studies of binary mixture of β-picoline and methanol using time domain reflectometry at different temperatures

作     者：C.M.Trivedi V.A.Rana P.G.Hudge A.C.Kumbharkhane 

作者机构：Department of PhysicsGujarat University Ahmedabad-380009GujaratIndia Allied Sciences DepartmentMKSSS's Cummins College of Engineering PuneMaharashtraIndia School of Physical SciencesSwami Ramanand Teerth Marathawada UniversityNandedMaharashtraIndia 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2016年第6卷第3期

页      面：56-63页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：Financial support provided by DRS-SAP program grant[No.F.530/10/DRS/2010(SAP-I)]have been utilized to carry out this work and it is gratefully acknowledged 

主　　题：Complex permittivity relaxation time time domain reflectometry CNLS fitting Redlich-Kister equation β-picoline 

摘      要：Complex permittivity spectra of binary mixtures of varying concentrations of β-picoline and Methanol(MeOH)have been obtained using time domain reflectometry(TDR)technique over frequency range 10 MHz to 25 GHz at 283.15,288.15,293.15 and 298.15K *** dielectric relaxation parameters namely static permittivity(ε),high frequency limit permittivity(ε∞1)and the relaxation time(τ)were determined by fiting complex permittivity data to the single Debye/Cole-Davidson *** nonlinear least square(CNLS)fiting procedure was carried out using LEVMW *** excess permittivity(ε_(0)^(E))and the excess inverse relaxation time(1/τ)^(E) which contain information regarding molecular structure and interaction between polar-polar liqids were also *** the experimental data,parameters such as effective Kirkwood correlation factor(geff),Bruggeman factor(fB)and some thermo dynamical parameters have been *** parameters were fitted to the Redlich-Kister polynomial *** values of static permittivity and relaxation time increase nonlinearly with increase in the mol-fraction of MeOH at all *** values of excess static permittivity(ε_(0)^(E))and the excess inverse relaxation time(1/τ)^(E) are negative for the studied β-picoline MeOH system at all temperatures.