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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/011/04/0307-0313

    • Keywords

       

      Dielectric constant; dielectric loss; interfacial polarisation; microscopic chemical heterogeneities; Ca-La-Ti Co oxide

    • Abstract

       

      Dielectric behaviour of samples of the system Ca1 −xLaxTi1 −xCoxO3 withx ⩽ 0·20 has been studied in the temperature range 300–525 K as a function of frequency. The strong dispersion ofɛ andD observed in these materials indicate the significant contribution of interfacial polarisation to the observed dielectric properties. The interfacial polarisation arises due to the presence of microscopic chemical heterogeneities arising out of the slow diffusion-controlled solid state sintering process used for their preparation.

    • Author Affiliations

       

      Ch Durga Prasad1 H S Tewari1 Devendra Kumar1 2 Om Parkash1

      1. School of Materials Science and Technology, Banaras Hindu University, Varanasi - 221 005, India
      2. Department of Ceramic Engineering, Institute of Technology, Banaras Hindu University, Varanasi - 221 005, India
    • Dates

       

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