Abstract
(Ba 0.95Ca 0.05)(Ti 0.88Zr 0.12)O 3 (BCTZ) ceramics have been produced in a protective atmosphere of industrial N 2 gas for potential piezoelectric applications. For comparison, the ceramics were also sintered at 1200–1400 °C in air. The results revealed that the reducing atmosphere of pO 2 = 5 × 10 2 Pa had no substantial effect on the phase structure or the microstructure of the BCTZ ceramics. The XRD patterns suggested a tetragonal to pseudocubic phase transition at sintering temperatures above 1300 °C in both atmospheres. The nitrogen-sintered BCTZ samples had higher dielectric constants ɛ r but lower electromechanical coupling coefficients k p than the air-sintered samples. The piezoelectric constant d 33 for the BCTZ ceramics was not significantly influenced by the reducing atmosphere of pO 2 = 5 × 10 2 Pa. The correlation of dielectric and piezoelectric properties of the BCTZ ceramics with the sintering temperature was explained based on a competing mechanism between phase structure and microstructure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
