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    • Characterization of ferroelectric and superconducting ceramics prepared from precursor carbonates

      D Pandey V S Tiwari A K Singh Sangeeta Chaudhry

      International Conference On Recent Advances In Materials And Processes Volume 12 Issue 3-4 September 1989 pp 245-261

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      https://www.ias.ac.in/article/fulltext/boms/012/03-04/0245-0261

    • Keywords

       

      Ferroelectric ceramics; superconducting ceramics; diffuse phase transition; ceramic powder processing; coherent domain size; line profile analysis

    • Abstract

       

      The advantages of a new semi-wet method for the synthesis of (Ba, Ca)TiO3 and YBa2Cu3O7 − y powders from precursor carbonates are described. The precursor carbonates are prepared using chemical coprecipitation technique under controlled pH conditions to ensure uniform distribution of Ba+2/Ca+2 and Y+3/Ba+2 ions. It is shown that the powders synthesized by this route possess better chemical homogeneity as compared to those obtained by the conventional ceramic technique involving calcination of a mixture of BaCO3, CaCO3, TiO2 and Y2O3, BaCO3, CuO powders. The behaviour of the ferroelectric (Ba, Ca)TiO3 and the superconducting YBa2Cu3O7 − y ceramics prepared from powders obtained by our method are found to be markedly different from those known for the conventionally prepared ceramics.

    • Author Affiliations

       

      D Pandey1 V S Tiwari1 A K Singh1 Sangeeta Chaudhry1

      1. School of Materials Science and Technology, Banaras Hindu University, Varanasi - 221 005, India

    • Dates

       
      Published
      September 1989

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