1. Enhanced energy storage properties of silver niobate antiferroelectric ceramics with A-site Eu3+ substitution and their structural origin.
- Author
-
Shi, Peng, Liu, Jin, Song, Yuechan, Wu, Wenwen, Liu, Lina, Zhou, Xiaobin, Chen, Xiaoming, Lou, Xiaojie, and Liu, Peng
- Subjects
ENERGY storage ,LEAD-free ceramics ,DIELECTRIC materials ,POWER resources ,POWER density ,FERROELECTRIC ceramics ,CERAMICS - Abstract
AgNbO
3 (AN)-based lead-free antiferroelectric ceramics are widely studied for their use as dielectric capacitor materials. In this study, Eu3+ -doped AN ceramics were prepared and the results show that Eu3+ diffused into the AN lattice. The ceramics were formed by M1 and M2 phases coexisting at room temperature, as distinct from the M1 (M: monoclinic) phase of pure AN. Electrical properties and structural characterization showed that the antiferroelectric stability of the ceramics increases with the increase in Eu3+ levels. At room temperature, Ag0.94 Eu0.02 NbO3 ceramic exhibited a good energy storage density of 5.3 J/cm3 and a high efficiency of 71.9%. When the temperature rises from room temperature to 140 °C, the efficiency of the sample decreases from 80.4% to 67.1% and Wr decreases from 2.1 to 2.0 J/cm3 , which indicates that the sample has good temperature stability. The time constant (t0.9 ) of this sample was less than 60 ns and the power density (PD ) was 51.3 MW/cm3 , indicating excellent charge–discharge capabilities. This novel ceramic is expected to be used as a new dielectric capacitor material for pulsed power supplies. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF