Open AccessEffects of local distortion on the electrical properties of lead free perovskite-type electro-ceramics Ba1-xCaxTi0.9Zr0.1O3
Author(s) -
G. HerreraPérez,
Armando Reyes-Montero,
Jesús Canche-Tello,
M. E. Montero-Cabrera,
María Elena Fuentes-Montero,
Jasper R. Plaisier,
Diane Eichert,
A. ReyesRojas,
L. Fuentes-Cobas
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1221/1/012005
Subject(s) - materials science , phase boundary , ferroelectricity , xanes , dielectric , tetragonal crystal system , curie temperature , perovskite (structure) , analytical chemistry (journal) , zirconium , crystal structure , ceramic , solid solution , mineralogy , crystallography , phase (matter) , condensed matter physics , spectroscopy , chemistry , optoelectronics , metallurgy , physics , organic chemistry , quantum mechanics , chromatography , ferromagnetism
The electro-ceramic industry has focused their attention on replacing lead-based materials due to their toxic effects and unfavourable environment impact. Barium titanate doped with calcium and zirconium denoted in this work as BCZT is a well-known perovskite-type solid solution. In particular, Ba 1-x Ca x Ti 0.9 Zr 0.1 O 3 (where x = 0, 0.1 and 0.15) compositions are located near the so called morphotropic phase boundary (MPB): coexistence of ferroelectric phases. This work shows the relationship between the crystal and electronic structure with the dielectric and piezo-ferroelectric properties. The high-resolution X-ray diffraction (HR-XRD) results suggest the coexistence of tetragonal and rhombohedral phases over the obtained compositions. The dielectric analysis indicates a relaxor behaviour with a Curie temperature in a range of 100-120°C. Piezoelectric and ferroelectric evaluation complement the electrical characterization for these compositions. Micro–X-ray absorption near edge spectroscopy (μ-XANES) was performed to monitor possible changes of electronic structure profile due to the local distortions as Ca2+ increases.