• Low voltage varistor ceramics based on SnO2

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    • Keywords


      Tin oxide; electronic materials; chemical synthesis; microstructure; X-ray diffraction.

    • Abstract


      The nonlinear current (𝐼)–voltage (𝑉) characteristics of tin dioxide doped with either Nb2O5 and CoO or Sb2O3 and CoO show promising values of nonlinear coefficient (𝛼) values (∼11) with low breakdown voltages (𝐸B, ∼40 V mm-1). The pentavalent antimony or niobium acts as donor and increases the electronic conductivity. The crucial parameter for obtaining low breakdown voltage is the grain size, which depends upon sintering duration and temperature of these oxide ceramics.

    • Author Affiliations


      S R Dhage1 V Ravi2 O B Yang1

      1. School of Environmental and Chemical Engineering, Chonbuk National University, Jeonju 561-756, South Korea
      2. Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India
    • Dates

  • Bulletin of Materials Science | News

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      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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