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      https://www.ias.ac.in/article/fulltext/boms/038/06/1473-1478

    • Keywords

       

      Electrolyte; ceramics; combustion synthesis; electrical properties; bandgap.

    • Abstract

       

      Zirconia stabilized with 11 mol% scandia (11ScSZ) has been successfully synthesized by novel alanine-assisted soft chemical aqueous combustion method. The reaction kinetics during combustion synthesis has been studied in detail by analysing thermal behaviour of different metal–alanine complexes. A single phase 11ScSZ powder is achieved at significantly low calcination temperature of 500° C. Field emission scanning electron micrograph reveals an agglomerated morphology with particle size ranging from 80 to 100 nm. The thermal expansion coefficient is found to be 11.03 × 10−6 °C−1 in the temperature range between room temperature and 1000° C. Optical bandgap of 5.19 eV has been determined using UV–Vis spectroscopy and results are compared with the help of theoretical density of states. The total electrical conductivity of sintered pellet is found to be 7.3 × 10−3 S cm−1 at 700° C as measured by impedance spectroscopy.

    • Author Affiliations

       

      Quazi Arif Islam1 Mir Wasim Raja2 Chiranjib Satra1 Rajendra Nath Basu1

      1. Fuel Cell and Battery Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700 032, India
      2. Chemistry Division, State Forensic Science Laboratory, Kolkata 700037, India.
    • Dates

       
  • Bulletin of Materials Science | News

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      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

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

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      Posted on July 25, 2019

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