• Higher d.c. resistivity of Li–Zn–Cd ferrites prepared by microwave sintering compared with conventional sintering

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      https://www.ias.ac.in/article/fulltext/boms/037/06/1227-1232

    • Keywords

       

      Ceramics; lithium ferrites; spinel structure; microwave sintering; d.c. resistivity; activation energy.

    • Abstract

       

      Cd2+-substituted Li–Zn ferrites having the general formula Li$^{+}_{0.4–x/2}$Zn$^{2+}_{0.2}$Cd$^{2+}_{x}$Fe$^{3+}_{2.4–x/2}$O$^{2-}_{4}$ where x = 0.02, 0.03 and 0.04 have been prepared by both microwave sintering and conventional sintering. In the former case, sintering was done at 1050 °C for 25 min, whereas in the latter case sintering was done at 1050 °C for 6 h. The various structural properties, microstructures and d.c. resistivity of the samples prepared by the two techniques were compared. The study showed higher d.c. resistivity and higher activation energies in the samples prepared by microwave sintering. The mechanisms pertaining to the results are discussed.

    • Author Affiliations

       

      Mamata Maisnam1 Sumitra Phanjoubam1

      1. Department of Physics, Manipur University, Canchipur, Imphal 795 003, India
    • Dates

       
  • Bulletin of Materials Science | News

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