Investigation on electrical properties of BCZT ferroelectric ceramics prepared at various sintering conditions

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Abstract
The influence of sintering conditions on phase formation, density, microstructure and electrical properties of BCZT ceramics wer investigated. The BCZT (Ba0.85Ca0.075Zr0.1Ti0.9O3) ceramics were fabricated by a mixed oxide synthetic route of BaCO3, CaCO3, ZrO2 and TiO2 precursors and then sintered at 1250, 1300 and 1350°C for 2 and 4 hrs. Phase formation, densification, microstructure surfaces, dielectric properties, ferroelectric and piezoelectric properties were analyzed by using X-ray diffraction (XRD), Archimedes method, Scanning Electron Microscopy (SEM), LCR Meter, P-E hysteresis and d33 meter, respectively. In processes of sintering, the results show that BCZT structures are perovskite with pseudo-cubic phase. Sintering condition at 1300°C for 4 hrs exhibits optimum density, grain size and higher electrical properties: density 5.62 g/cm3 (∼98% of theoretical density), average grain size = 2.19 ± 0.87 µm, dielectric constant (ϵr) = 2840, dielectric loss (tan δ) = 0.10, remanent polarization (Pr) = 5.84 µC/cm2 and d33 = 167 pC/N.
Funding Information
  • Suranee University of Technology
  • Light Research Institute
  • Royal Golden Jubilee Programme
  • Office of the Higher Education Commission
  • Newton Fund
  • the Higher Education Commission (Thailand) under Industry Academia Partnership Programme - THAILAND

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