TY - JOUR
T1 - Energy-storage properties of Bi0.5Na0.5TiO3-BaTiO3-KNbO3 ceramics fabricated by wet-chemical method
AU - Xu, Qi
AU - Xie, Juan
AU - He, Zichen
AU - Zhang, Lin
AU - Cao, Minghe
AU - Huang, Xindi
AU - Lanagan, Michael T.
AU - Hao, Hua
AU - Yao, Zhonghua
AU - Liu, Hanxing
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (No. 51372191 ), National Key Basic Research Program of China (973 Program) (No. 2015CB654601 ), International Science and Technology Cooperation Program of China ( 2011DFA52680 ), the Fundamental Research Funds for the Central Universities ( WUT:152401002 and 152410002 ). Qi Xu thanks Mr. Tianming Li for his encouragement and helpful suggestion on this work.
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/1/1
Y1 - 2017/1/1
N2 - 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 (BNTBT) and KNbO3 (KN) powders with average particle size of ∼50 nm and ∼300 nm were synthesized by sol-gel method and hydrothermal method, respectively. Then, (1 − x)(BNTBT)-xKN (BNTBT-KN, x = 0, 0.01, 0.03, 0.05, 0.07) ceramic samples were prepared using these two powder precursors. The structure, dielectric and energy-storage properties of BNTBT-KN ceramics were comprehensively investigated. All the ceramic samples were in single perovskite structure, indicating that KN can completely dissolve into BNTBT within the studied composition range. BNTBT-KN ceramics exhibited a high dielectric constant at room temperature, being in the order of 1430–1550. Ferroelectric hysteresis loops at room temperature became more slim with the increase of KN content, which largely improved energy-storage density and efficiency. For the composition of x = 0.05, the maximum recoverable energy-storage density reached 1.72 J/cm3 under 16.8 kV/mm, which is superior to linear dielectrics and even some Pb-based systems. All these results demonstrate that 0.95BNTBT-0.05KN fabricated by wet-chemical method is a promising lead-free dielectric material for energy-storage capacitors.
AB - 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 (BNTBT) and KNbO3 (KN) powders with average particle size of ∼50 nm and ∼300 nm were synthesized by sol-gel method and hydrothermal method, respectively. Then, (1 − x)(BNTBT)-xKN (BNTBT-KN, x = 0, 0.01, 0.03, 0.05, 0.07) ceramic samples were prepared using these two powder precursors. The structure, dielectric and energy-storage properties of BNTBT-KN ceramics were comprehensively investigated. All the ceramic samples were in single perovskite structure, indicating that KN can completely dissolve into BNTBT within the studied composition range. BNTBT-KN ceramics exhibited a high dielectric constant at room temperature, being in the order of 1430–1550. Ferroelectric hysteresis loops at room temperature became more slim with the increase of KN content, which largely improved energy-storage density and efficiency. For the composition of x = 0.05, the maximum recoverable energy-storage density reached 1.72 J/cm3 under 16.8 kV/mm, which is superior to linear dielectrics and even some Pb-based systems. All these results demonstrate that 0.95BNTBT-0.05KN fabricated by wet-chemical method is a promising lead-free dielectric material for energy-storage capacitors.
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U2 - 10.1016/j.jeurceramsoc.2016.07.011
DO - 10.1016/j.jeurceramsoc.2016.07.011
M3 - Article
AN - SCOPUS:84979055415
SN - 0955-2219
VL - 37
SP - 99
EP - 106
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 1
ER -