1. Home
    2. Journals
    3. Bulletin of Materials Science
    4. Volume 45
    5. All articles

    • Phase evolution and conductivity study of doped gadolinium-based perovskite oxides

      AMIT SINHA

      Volume 45 Published: 20 April 2022 Article ID 0072

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/045/0072

    • Keywords

       

      Solid oxide fuel cell; oxide ion conductor; impedance spectroscopy; perovskite; citrate gel.

    • Abstract

       

      The phase evolution and electrical conductivity of strontium-doped gadolinium aluminate (GdAlO$_3$) based perovskite oxides were investigated. The strontium-doped compositions of GdAlO$_3$ were prepared through the citrate gelprocess. Analyses of the phases in the Gd$_{1–x}$Sr$_x$AlO$_{3–{\delta}}$ system were carried out using X-ray diffraction. The morphology of the calcined powders was studied through scanning electron microscopy. The strontium-doped GdAlO$_3$ powdersobtained after calcination at 1000°C was found to be porous agglomerate composed of nanocrystalline grains. The electrical conductivity of Gd$_{1–x}$Sr$_x$AlO$_{3–{\delta}}$ (x = 0.02–0.14) was measured using ac impedance spectroscopy as a function of temperature ranging from 300 to 1000°C under air. The solid solubility of strontium in GdAlO$_3$ was found to be around 8 mol%. The undissolved strontium precipitated in the form of SrGd$_2$Al$_2$O$_7$ phase. The total electrical conductivity of Srdoped GdAlO$_3$ increased with increasing amounts of strontium up to 6 mol% doping.

    • Author Affiliations

       

      AMIT SINHA1

      1. Powder Metallurgy Division, Materials Group, Bhabha Atomic Research Centre, Navi Mumbai 400703, India

    • Dates

       
      Published
      20 April 2022
      Manuscript received
      4 August 2021
      Accepted
      5 December 2021
      Final version published online
      20 April 2022

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      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

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2022-2023 Indian Academy of Sciences, Bengaluru.

Contact | Site index