Abstract
This work directly tests electrocaloric effect (ECE) of (0.94-x)Bi0.5Na0.5TiO3–0.06BaTiO3–xSrZrO3 (BNBTSZx) with x = 0 (SZ0), x = 0.01 (SZ0.01), x = 0.02 (SZ0.02) and x = 0.03 (SZ0.03) at different temperature points. The Sr2+ and Zr4+ are introduced into 0.94Bi0.5Na0.5TiO3–0.06BaTiO3 to convert nonergodic relaxor phase into ergodic relaxor phase and form new morphotropic phase boundary (MPBⅡ) at room temperature. A temperature change of 0.37 K and electrocaloric strength of 6.17 × 10−3 K cm/kV are obtained at room temperature. According to the temperature dependence of ΔT and the electric-field dependence of electrocaloric strength, this work focus on the mechanism about higher electrocaloric effect at over-MPBⅡ temperature point. Electrical performances, microstructure and piezoelectric properties are investigated in detail to analyze the local-area phase transformation causing the high electrocaloric effect. The electrocaloric strength of ergodic relaxor phase shows stronger dependence on the electric field than that of nonergodic relaxor phase.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.