Electrical relaxations in mixtures of lithium chloride and glycerol.

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概要

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• The dielectric constant ε′ and the electrical conductivity σ were measured as a function of frequency (0.1–2 MHz) and temperature for an electrolyte-polar solvent system: lithium chloride in glycerol. Mole fractions of LiCl were 0, 1, 2, 5, 10, 20, and 33.3%. Data were analysed in terms of an inverse complex permittivity(electrical modulus). At lower mole fractions, two separate modulus relaxations were observed, one due to the ionic diffusion and the other to the dipole reorientation. These two relaxation processes converged with increasing LiCl mole fraction and were not distinguishable at 20%. The moduli isotherms at 33.3% were characteristic of a fused salt. Average relaxation times and distributions for both processes were determined by computer fits to a Gaussian distribution in the logarithms of these times. Their temperature and mole fraction dependences are discussed. The conductivity relaxations became slightly broader than single at 10%; this shows the influence of the charge concentration on the structural relaxation process.

• 公益社団法人 日本化学会の論文

著者

• Howell F.

  Department Of Chemistry Faculty Of Science And Engineering Sophia University

• Macedo Pedro

  Vitreous State Laboratory, Department of Chemical Engineering and Materials Science, The Catholic University of America

• Moynihan Cornelius

  Department of Chemistry, Faculty of Science and Technology, Sophia University

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