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- Title
Enhanced Energy-Storage Performances in Sodium Bismuth Titanate-Based Relaxation Ferroelectric Ceramics with Optimized Polarization by Tuning Sintering Temperature.
- Authors
Wu, Jianhua; Ma, Ziyue; Yao, Yuan; Sun, Ningning; Zhao, Ye; Li, Yong; Liu, Runchang; Hao, Xihong
- Abstract
Energy-storage capacitors based on relaxation ferroelectric ceramics have attracted a lot of interest in pulse power devices. How to improve the energy density by designing the structure of ceramics through simple approaches is still a challenge. Herein, enhanced energy-storage performances are achieved in relaxation ferroelectric 0.9 (0.94Na0.5Bi0.5TiO3-0.06BaTiO3)-0.1NaNbO3 (NBT-BT-NN) ceramics by tuning sintering temperature. The original observation based on Kelvin probe force microscopy (KPFM) presented that the sintering temperature has a key effect on the electrical homogeneousness of the ceramics. It is found that a high electrical homogeneousness can induce quick and active domain switching due to the weakening of the constraint from built-in fields, resulting in a big polarization difference. This work provides a feasible strategy to design high-performance energy-storage ceramic capacitors.
- Subjects
FERROELECTRIC ceramics; KELVIN probe force microscopy; CERAMIC capacitors; SINTERING; BISMUTH; ENERGY density
- Publication
Materials (1996-1944), 2022, Vol 15, Issue 14, pN.PAG
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma15144981