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

Pramana

S N Helambe²  Prabhakar Undre1¹  P W Khirade¹  S C Mehrotra³  S B Jagadale² 

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

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

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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 𝜀*(𝜔) from complex reflection coefficient ρ*(𝜔) over the frequency range of 10 MHz to 10 GHz. The excess permittivity (𝜀E), excessinverse relaxation time (1/𝜏)E, Kirkwood correlation factor (𝑔eff), activation energy and Bruggeman factor (𝑓B) are also calculated to study the solute–solvent interaction.

【 授权许可】

Unknown