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      https://www.ias.ac.in/article/fulltext/boms/043/0082

    • Keywords

       

      Lead-free piezoceramics; BaZrO$_3$; high temperature XRD; dielectric; Rietveld refinement.

    • Abstract

       

      This study highlights the effect of BaZrO$_3$ doping on (Na$_{0.52}$K$_{0.48}$)(Nb$_{0.95}$Ta$_{0.05}$)O$_3$ lead-free composition. The doping, interestingly, reveals the formation of a new polymorphic phase boundary between rhombohedral and tetragonalphases, while eliminating the orthorhombic phase. Rietveld refinement of temperature dependent X-ray diffraction data, in conjunction with dielectric studies, was utilized to corroborate the findings. The study also addresses in detail the process optimization methodology, involving calcination, sintering and poling process, which is highly relevant to the research community. Two mol% BaZrO$_3$-doped samples exhibited better piezoelectric, ferroelectric and dielectric properties. The doping also substantially improved the stability of properties during ageing, under thermal and cyclic electrical loadings.

    • Author Affiliations

       

      BHUPENDER RAWAL1 PRASHANT DIXIT1 N N WATHORE1 B PRAVEENKUMAR1 H S PANDA2

      1. Armament Research and Development Establishment, Pune 411021, India
      2. Defence Institute of Advanced Technology, Pune 411025, India
    • Dates

       
  • Bulletin of Materials Science | News

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