Title :
Phase transitions and dielectric, ferroelectric and piezoelectric properties of Bi0.5(Na0.82K0.18)0.5TiO3-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 cera
Author :
Yang Bai ; Matousek, Ales ; Tofel, Pavel ; Bo Nan ; Bijalwan, Vijay ; Kral, Michael ; Hughes, Hana ; Button, Tim W. ; Pooladvand, Hojat
Author_Institution :
Central Eur. Inst. of Technol. - CEITEC, Brno, Czech Republic
Abstract :
This paper reports an investigation of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (50BCZT) piezoelectric ceramics doped with Bi0.5(Na0.82K0.18)0.5TiO3 (18BNKT). For compositions between 1-5 wt% 18BNKT, a perovskite phase was observed in the sintered ceramics, with d33 values of approximately 370 pC/N measured at room temperature, which is about 80 % of that of pure 50BCZT. Also, the doped materials exhibit a remanent polarization of 2-5 μC/cm2 at temperatures above the Curie temperature (> 90 °C) of the pure 50BCZT composition. This research shows a promising route to improve the working temperature range whilst maintain good piezoelectric properties of the 50BCZT ceramics.
Keywords :
barium compounds; bismuth compounds; calcium compounds; ferroelectric Curie temperature; piezoceramics; potassium compounds; sintering; sodium compounds; ((Ba0.85Ca0.15)(Zr0.1Ti0.9)O3):(Bi0.5(Na0.82K0.18)0.5TiO3); Curie temperature; perovskite phase; phase transitions; piezoelectric properties; remanent polarization; sintered ceramics; Ceramics; Electric fields; Lead; Powders; Temperature distribution; Temperature measurement; BCZT; BNKT; Curie temperature; piezoelectric;
Conference_Titel :
Applications of Ferroelectric, International Symposium on Integrated Functionalities and Piezoelectric Force Microscopy Workshop (ISAF/ISIF/PFM), 2015 Joint IEEE International Symposium on the
Conference_Location :
Singapore
DOI :
10.1109/ISAF.2015.7172723
