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

• Published in: Integrated ferroelectrics Vol. 187; no. 1; pp. 45 - 52
• Main Authors: Buatip, N., Promsawat, N., Pisitpipathsin, N., Namsar, O., Pawasri, P., Ounsung, K., Phabsimma, K., Rattanachan, S. T., Janphuang, P., Projprapai, S.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis Ltd 12.02.2018
• Subjects: Calcium carbonate; Ceramics; Densification; Dielectric loss; Dielectric properties; Electrical properties; Electron microscopy; Electronics; Ferroelectric materials; Ferroelectricity; Grain size; Microstructure; Piezoelectricity; Sintering; Theoretical density; Titanium dioxide; X-ray diffraction; Zirconium dioxide
• ISSN: 1058-4587; 1607-8489
• DOI: 10.1080/10584587.2018.1445395

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 ([GREEK LUNATE EPSILON SYMBOL]r) = 2840, dielectric loss (tan δ) = 0.10, remanent polarization (Pr) = 5.84 µC/cm2 and d33 = 167 pC/N.