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Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO‐ and Fe 2 O 3 ‐Doped BCZT Ceramics
Author(s) -
Jaimeewong Piyaporn,
Sitti Satapond,
Buntham Suwapitcha,
Bomlai Pornsuda,
Namsar Orapim,
Pojprapai Soodkhet,
Watcharapasorn Anucha
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201701023
Subject(s) - materials science , ferroelectricity , rietveld refinement , tetragonal crystal system , dielectric , dopant , microstructure , doping , analytical chemistry (journal) , ceramic , perovskite (structure) , phase (matter) , ferroelectric ceramics , mineralogy , crystallography , crystal structure , composite material , chemistry , optoelectronics , organic chemistry , chromatography
This study investigates the effect of CoO and Fe 2 O 3 dopant on phase, microstructure and ferroelectric properties of BCZT ceramics with the formula of Ba 0.85 Ca 0.15 Zr 0.1 (Ti 1‐ x Co x ) 0.9 O 3 and Ba 0.85 Ca 0.15 Zr 0.1 (Ti 1‐ x Fe x ) 0.9 O 3 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 Fe 2 O 3 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 Fe 2 O 3 addition. The average grain sizes decreased upon CoO and Fe 2 O 3 addition. It is found that the doping of CoO and Fe 2 O 3 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.