Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO‐ and Fe2O3‐Doped BCZT Ceramics. Issue 20 (21st May 2018)

• Record Type: Journal Article
• Authors: Jaimeewong, Piyaporn; Sittinon, Satapond; Buntham, Suwapitcha; Bomlai, Pornsuda; Namsar, Orapim; Pojprapai, Soodkhet; Watcharapasorn, Anucha
• Other Names: Yoon Seok‐Jin guestEditor.; Park Hyung‐Ho guestEditor.
• Is Part Of: Physica status solidi. Volume 215:Issue 20(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-21
• Subjects: BCZT ceramics -- CoO‐doped -- Fe2O3‐doped -- ferroelectrics -- piezoelectrics; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201701023
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : This study investigates the effect of CoO and Fe2 O3 dopant on phase, microstructure and ferroelectric properties of BCZT ceramics with the formula of Ba0.85 Ca0.15 Zr0.1 (Ti1‐ x Co x )0.9 O3 and Ba0.85 Ca0.15 Zr0.1 (Ti1‐ x Fe x )0.9 O3 where x = 0, 0.01, and 0.03. The XRD patterns presented that the pure perovskite phases are observed regardless of the amount of CoO and Fe2 O3 added. Rietveld analysis shows that the tetragonal phase is observed in all patterns and the unit cell volume slightly expanded by the CoO addition while it is distorted with increasing Fe2 O3 addition. The average grain sizes decreased upon CoO and Fe2 O3 addition. It is found that the doping of CoO and Fe2 O3 caused the transition temperature to shift to lower temperature. The optimum ferroelectric and dielectric properties can be achieved for the BCZT‐0.01Co ceramics. This study shows that while small doping with Co and Fe can enhance different properties of BCZT with lower processing temperature, the properties should be further optimized by chemical modification. Abstract : The BCZT ceramics with small amount of Co and Fe doping are investigated. Both dopants show similar effects on the reduction of grain size, ferroelectric hysteresis loop and the temperature of the dielectric maxima ( T c ). However, the higher piezoelectric constant is observed for Co‐doped sample which is thought to be due to the inherent difference in valency and defects present.