Abstract
The phase structure, microstructure, ferroelectric and dielectric properties of NiO-modified BaTiO3-4.0 mol%Nb2O5 ceramics (BT-Nb-Ni) were systematically investigated. All the specimens revealed cubic perovskite structure along with Ba3Nb3.2Ti5O21 second phase by XRD analysis. Small amount of NiO addition (x ≤ 0.5) had the effect of inhibiting grain growth, while a further increase of NiO content (x ≥ 1.0) led to relatively large grains with an average grain size of ~ 0.40 μm. From P-E hysteresis loops and modified Curie–Weiss fitting, NiO addition first reduced and then enhanced the relaxor behaviour of the system. The er-T curves of BT-Nb-Ni ceramics were significantly flattened, leading to greatly optimized dielectric temperature stability. The optimum property was achieved in the composition BT-Nb-2.0%Ni with er = 1380 and △C/C25 °C ≤ ± 15% in the temperature range of − 65–170 °C.
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 callMore From: Journal of Materials Science: Materials in Electronics
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.
