Microwave dielectric characterization of binary mixture of formamide with <Emphasis Type="Italic">N,N</Emphasis>-dimethylaminoethanol |
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| Authors: | Prabhakar Undre S N Helambe S B Jagdale P W Khirade S C Mehrotra |
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| Institution: | (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 |
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| 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 the frequency 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
ɛ*(ω) from complex reflection coefficient ρ*(ω) over the frequency range of 10 MHz to 10 GHz. The excess permittivity (ɛ
E), excess inverse relaxation time (1/τ)E, Kirkwood correlation factor (g
eff), activation energy and Bruggeman factor (f
B) are also calculated to study the solute-solvent interaction.
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| Keywords: | Time domain reflectometry formamide dimethylaminoethanol excess parameters Kirkwood correlation factor Bruggeman factor activation energy |
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