Advertisement
Published in:
01-07-2015
Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics
Published in: Journal of Materials Science: Materials in Electronics | Issue 7/2015
Log inActivate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
Abstract
Pb-free ceramics Ba0.85Ca0.15Ti0.90Zr0.10O3 inspired by the excellent piezoelectricity of morphotropic phase boundary deriving from a tricritical point have been prepared by a solid state reaction route and the effects of grain size and room-temperature phases of the ceramics have been studied in detail. When sintering temperature rises from 1320 to 1560 °C with controlling the dwell time for 2 h, the ceramic sintered at 1480 °C possesses the optimum piezoelectricity. We choose 1360 and 1480 °C as two distinctive sintering temperatures to further study the effect of dwell time on the electrical properties of the ceramics. The results show that the improved piezoelectric behavior (d
33 ~ 416 pC/N and k
p ~ 55.8 %) is demonstrated for the Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramic at an optimal sintering temperature of 1480 °C and dwell time of 2 h, which is attributed to the largest grain size together with more noticeable rhombohedral–tetragonal phase transition near room-temperature.