• Variation of electrical properties in sepiolite during dehydration

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      https://www.ias.ac.in/article/fulltext/boms/007/02/0111-0115

    • Keywords

       

      Sepiolite; dielectric constant and loss; electrical conductivity; dehydration

    • Abstract

       

      The dielectric constant (K), loss (tanδ) andac conductivity of a sepiolite sample have been measured as a function of frequency in the range 102-107 Hz and in the temperature region 30–400°C. Thedc conductivities of hot pressed pellets were measured in the temperature range 30–550°C.K and tanδ of these samples decrease with increasing frequency. Results of these measurements have been correlated with the structural transformation accompanying dehydration, making use ofdta, ir and x-ray data. The moderately large value of activation energy (∼ 2·2 eV) in the intrinsic range suggests that the conduction process is most probably associated with ions.

    • Author Affiliations

       

      S Lokanatha1 S Bhattacherjee1

      1. Department of Physics, Indian Institute of Technology, Kharagpur - 721 302, India
    • Dates

       
  • Bulletin of Materials Science | News

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