Ba0.04Bi0.48Na0.48TiO3-SrTiO3陶瓷微结构和储能性能

doi:10.11896/j.issn.1005-023X.2018.02.002

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Abstract

(1-x)Ba_0.04Bi_0.48Na_0.48TiO₃-xSrTiO₃(x=0.27,0.28,0.30,0.32,0.34 and 0.36) lead-free energy storage cera-mics were produced by conventional solid-state reaction processes. Microstructures, electrical properties, dielectric properties and conductivity characteristic of BBNT-xST ceramics were investigated. All of the ceramics formed solid solutions with simple perovskite structure and grain size of the ceramics is uniform and compact. Ferroelectric curves of all the ceramics showed a double hysteresis loop owning a quite low remnant polarization and high breakdown strength, demonstrating an antiferroelectric characteristic. Up to x=0.34, the largest energy-storage density of 0.977 J/cm ³ was obtained and high dielectric dispersion of the ceramic suggested a typical relaxor behavior. Electronic conductivity of the ceramic with x=0.34 was 6.02×10 ^-13 S/cm while the corresponding ionic conductivity 2.4×10 ^-8 S/cm at low frequency, denoting that the ionic conductivity was dominant in conduction processes.

Key words： Ba_0.04Bi_0.48Na_0.48TiO₃-SrTiO₃ energy-storage ferroelectric microstructures

Published: 25 January 2018 Online: 2018-01-25

CLC number:

TB34

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	Articles by authors
	Kui ZHENG
	Changlai YUAN
	Xingxing ZHOU
	Weiqing WANG
	Jiwen XU
	Changrong ZHOU

Cite this article:

Kui ZHENG,Changlai YUAN,Xingxing ZHOU, et al. Microstructures and Energy-storage Properties of Ba_0.04Bi_0.48Na_0.48TiO₃-SrTiO₃ Ceramics[J]. Materials Reports, 2018, 32(2): 171-175.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.02.002 OR https://www.mater-rep.com/EN/Y2018/V32/I2/171

X-ray diffraction patterns of BBNT-xST ceramics

FE-SEM micrographs of BBNT-xST ceramics

Polarization hysteresis loops of BBNT-xST ceramics

Energy-storage density (W) and efficiency (η) of BBNT-xST ceramics

Polarization hysteresis loops of BBNT-0.34ST ceramics

Energy-storage density (W) and efficiency (η) of BBNT-0.34ST ceramics as a function of external electric field

Frequency and temperature dependence of ε_r and tanδ of BBNT-xST ceramics

Plots of ln(1/ε-1/ε_m) vs. ln(T-T_m) at 10 kHz for BBNT-xST ceramics

Room-temperature resistance with logarithmic frequencies for BBNT-0.34ST ceramic

lgI-lgV curve of BBNT-0.34ST ceramic

Ionic conductivity of BBNT-0.34ST ceramic at various frequencies

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