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- Title
Effects of NiO addition on structure and dielectric properties of BaTiO3-based ceramics.
- Authors
Xu, Qi; Huang, Wanting; Deng, Rui; Chen, Hanxing; Liu, Hanxing
- 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 εr-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 εr = 1380 and △C/C25 °C ≤ ± 15% in the temperature range of − 65–170 °C.
- Subjects
DIELECTRIC properties; RELAXOR ferroelectrics; CERAMICS; HYSTERESIS loop; GRAIN size; MICROSTRUCTURE
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 10, p13539
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-05930-6