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《材料导报》期刊社  2018, Vol. 32 Issue (2): 171-175    https://doi.org/10.11896/j.issn.1005-023X.2018.02.002
  物理   材料研究 ｜材料 |
Ba0.04Bi0.48Na0.48TiO3-SrTiO3陶瓷微结构和储能性能
郑奎1,袁昌来2,周星星1,王维清1,许积文2,周昌荣2
1 西南科技大学分析测试中心, 绵阳 621010
2 桂林电子科技大学,广西信息材料重点实验室,桂林 541004
Microstructures and Energy-storage Properties of Ba0.04Bi0.48Na0.48TiO3-SrTiO3 Ceramics
Kui ZHENG1,Changlai YUAN2,Xingxing ZHOU1,Weiqing WANG1,Jiwen XU2,Changrong ZHOU2
1 Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010
2 Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004
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摘要 

采用传统固相反应法制备了一种无铅储能铁电陶瓷 (1-x)Ba0.04Bi0.48Na0.48TiO3-xSrTiO3 (x=0.27、0.28、0.30、0.32、0.34、0.36),研究了该陶瓷体系的微观结构、铁电、介电和电导率特征。所有陶瓷均形成了钙钛矿结构固溶体,晶粒尺寸均匀且致密。各陶瓷所得铁电曲线趋于双电滞回线,呈现反铁电特征,剩余极化强度较小,击穿强度高。当x=0.34时,可获得0.977 J/cm 3的较优储能值,陶瓷弥散程度高,表现为典型的弛豫特性。此含量对应低频下陶瓷的离子电导率为2.4×10 -8 S/cm,电子电导率为6.02×10 -13 S/cm,表明离子电导居于主导地位。

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郑奎
袁昌来
周星星
王维清
许积文
周昌荣
关键词:  Ba0.04Bi0.48Na0.48TiO3-SrTiO3  储能  铁电性  微结构    
Abstract: 

(1-x)Ba0.04Bi0.48Na0.48TiO3-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:  Ba0.04Bi0.48Na0.48TiO3-SrTiO3    energy-storage    ferroelectric    microstructures
               出版日期:  2018-01-25      发布日期:  2018-01-25
ZTFLH:  TB34  
基金资助: 国家自然科学基金(11464006)
引用本文:    
郑奎,袁昌来,周星星,王维清,许积文,周昌荣. Ba0.04Bi0.48Na0.48TiO3-SrTiO3陶瓷微结构和储能性能[J]. 《材料导报》期刊社, 2018, 32(2): 171-175.
Kui ZHENG,Changlai YUAN,Xingxing ZHOU,Weiqing WANG,Jiwen XU,Changrong ZHOU. Microstructures and Energy-storage Properties of Ba0.04Bi0.48Na0.48TiO3-SrTiO3 Ceramics. Materials Reports, 2018, 32(2): 171-175.
链接本文:  
http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.02.002  或          http://www.mater-rep.com/CN/Y2018/V32/I2/171
图1  BBNT-xST陶瓷的XRD谱
图2  BBNT-xST陶瓷的扫描电镜图
图3  BBNT-xST陶瓷的电滞回线
图4  BBNT-xST陶瓷的储能密度和储能效率
图5  BBNT-0.34ST陶瓷的电滞回线
图6  BBNT-0.34ST陶瓷的储能密度和储能效率随电场的变化
图7  BBNT-xST陶瓷的介电常数/损耗-温度/频率曲线
图8  在10 kHz下BBNT-xST陶瓷的ln(1/ε-1/εm)和ln(T-Tm)的关系
图9  BBNT-0.34ST陶瓷的室温电阻随频率对数的变化
图10  BBNT-0.34ST陶瓷的lgI-lgV曲线
Frequency/Hz 40 102 103 104 105 106 107
Resistance/Ω 4.1×106 1.7×106 1.8×105 1.9×104 2.0×103 2.2×102 19
Ion conductivity
S/cm		 2.4×10-8 5.9×10-8 5.6×10-7 5.3×10-6 4.9×10-5 4.5×10-4 5.1×10-3
表1  BBNT-0.34ST陶瓷在各个频率下的离子电导率
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