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    • Investigation of dielectric relaxation in dipolar liquids from conductivity measurement

      D KUMAR S K SIT S N SINGH S SAHOO

      Volume 45 Published: 16 February 2022 Article ID 0037

    • Fulltext

       

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      https://www.ias.ac.in/article/fulltext/boms/045/0037

    • Keywords

       

      Conductivity; relaxation time; dipole moment; penetration depth; dielectric relaxation.

    • Abstract

       

      Conductivity (σ$_{ijk}$’s) measurement method is proposed to investigate dielectric relaxation in ternary polar–nonpolar mixture of N,N-dimethyl formamide (DMF)(j) with pyridine(k) or acetonitrile(k) dissolved in p-xylene (i) at various weight fractions (w$_{jk}$’s) and temperature under different bands (S, C, X and Ku) of microwave field applying Debye’s dielectric model. Ratio of slopes of imaginary σ$_{ijk}$″ vs. w$_{jk}$ with real σ$_{ijk}$′ vs. w$_{jk}$ of complex conductivity σ$_{ijk}$* as well as linear slope of σ$_{ijk}$″ vs. σ$_{ijk}$′ are used to predict τ$_{jk}$’s (relaxation time) and μ$_{jk}$’s (dipole moments). Variousmolecular associations are also identified from the meaningful interactions among polar–nonpolar molecules in terms of τ$_{jk}$ and μ$_{jk}$. Molecular dynamics or molecular environment surrounding the polar molecules DMF, pyridine or acetonitrileis extensively studied with the help of estimated thermodynamic energy parameters. The existence of Debye relaxation mechanism in polar–nonpolar mixture is authenticated by the estimated Debye factor. Microwave sensor development is also ascertained from various dielectric parameters like permittivity, conductivity and penetration depth under microwave field.

    • Author Affiliations

       

      D KUMAR1 S K SIT2 S N SINGH1 S SAHOO1

      1. Department of Electronics and Communication Engineering, National Institute of Technology Jamshedpur, Jamshedpur 831014, India
      2. Department of Physics, Dr. MeghnadSaha Institute of Technology, Haldia 721657, India

    • Dates

       
      Published
      16 February 2022
      Manuscript received
      15 June 2021
      Accepted
      16 September 2021
      Final version published online
      16 February 2022

  • Bulletin of Materials Science | News

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      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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