TY - JOUR
T1 - Microstructure evolution, mechanism of electric breakdown strength, and dielectric energy storage performance of CuO modified Ba0.65Sr0.245Bi0.07TiO3 Pb-free bulk ceramics
AU - Liu, Gang
AU - Li, Yang
AU - Dong, Jia
AU - Yu, Linjiang
AU - Zhang, Yutong
AU - Hu, Jinzhu
AU - Gao, Jinghui
AU - He, Zhanbing
N1 - Publisher Copyright:
© 2019 Elsevier Ltd and Techna Group S.r.l.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Barium titanate (BaTiO3)-based lead-free relaxor ferroelectric ceramic Ba0.65Sr0.245Bi0.07TiO3 was developed via a traditional electrocremic processing technique to obtain Pb-free dielectric bulk ceramics with enhanced energy storage performance that can be potentially used in pulsed power devices. The added CuO can broaden the phase transition peak, and move it to lower temperature, reinforcing the dielectric relaxor behavior. The microstructure evolution of the sample was investigated via Piezoforce microscopy, and the corresponding mechanism regarding the electric breakdown strength was studied. The solubility of solid CuO in the Ba0.65Sr0.245Bi0.07TiO3 is approximately 0.02 mol. The ceramic sample with 0.005 mol CuO possesses 160 kV/cm electrical breakdown strength and an energy storage efficiency higher than 76%, which yields 1.28 J/cm3 energy storage density. Moreover, the ceramic specimen with 0.005 CuO exhibits relatively good temperature stability, good frequency stability from 1 Hz to 200 Hz, and also good fatigue resistance up to 105 cycles, and can be a potential candidate for future energy storage applications.
AB - Barium titanate (BaTiO3)-based lead-free relaxor ferroelectric ceramic Ba0.65Sr0.245Bi0.07TiO3 was developed via a traditional electrocremic processing technique to obtain Pb-free dielectric bulk ceramics with enhanced energy storage performance that can be potentially used in pulsed power devices. The added CuO can broaden the phase transition peak, and move it to lower temperature, reinforcing the dielectric relaxor behavior. The microstructure evolution of the sample was investigated via Piezoforce microscopy, and the corresponding mechanism regarding the electric breakdown strength was studied. The solubility of solid CuO in the Ba0.65Sr0.245Bi0.07TiO3 is approximately 0.02 mol. The ceramic sample with 0.005 mol CuO possesses 160 kV/cm electrical breakdown strength and an energy storage efficiency higher than 76%, which yields 1.28 J/cm3 energy storage density. Moreover, the ceramic specimen with 0.005 CuO exhibits relatively good temperature stability, good frequency stability from 1 Hz to 200 Hz, and also good fatigue resistance up to 105 cycles, and can be a potential candidate for future energy storage applications.
KW - BaTiO
KW - Electric breakdown strength
KW - Impedance
KW - Temperature stability
UR - https://www.scopus.com/pages/publications/85068864723
U2 - 10.1016/j.ceramint.2019.07.148
DO - 10.1016/j.ceramint.2019.07.148
M3 - 文章
AN - SCOPUS:85068864723
SN - 0272-8842
VL - 45
SP - 21544
EP - 21556
JO - Ceramics International
JF - Ceramics International
IS - 17
ER -