Enhanced energy storage density of Ba0.4Sr0.6TiO3-MgO composite prepared by spark plasma sintering

被引：222
作者：
Huang, Yu Hui [1 ,2 ,3 ]
Wu, Yong Jun [1 ,2 ,3 ]
Qiu, Wei Jun [1 ,2 ,3 ]
Li, Juan [4 ]
Chen, Xiang Ming [2 ]
机构：
[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Lab Dielect Mat, Hangzhou 310027, Zhejiang, Peoples R China
[3] Zhejiang Univ, Cyrus Tang Ctr Sensor Mat & Applicat, Hangzhou 310027, Zhejiang, Peoples R China
[4] Zhejiang Univ Technol, Coll Chem Engn & Mat Sci, Hangzhou 310006, Zhejiang, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 05期
基金：
美国国家科学基金会; 高等学校博士学科点专项科研基金;
关键词：
Barium strontium titanate; Magnesium oxide; Spark plasma sintering; Energy storage; CORE-SHELL STRUCTURE; BARIUM STRONTIUM-TITANATE; DIELECTRIC-PROPERTIES; MGO; MICROSTRUCTURE; BEHAVIOR; DENSIFICATION; STRENGTH;
D O I：
10.1016/j.jeurceramsoc.2014.11.022
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
(100-x) wt%Ba0.4Sr0.6TiO3-xwt%MgO composite (x=3, 5, 10) were prepared by spark plasma sintering (SPS) and their phase constitutions, microstructure and electrical energy storage properties were investigated. It was found that the reaction between Ba0.4Sr0.6TiO3 and MgO was suppressed due to low sintering temperature and short sintering period. The Curie temperature of BST/MgO composite is independent of the MgO content, which confirms the absence of chemical interdiffusion between BST and MgO. Diffuse phase transition was observed due to the reduced grain size and lack of sufficient chemical diffusion during SPS process. The dielectric breakdown strength of Ba0.4Sr0.6TiO3/MgO composite was greatly improved, which results in a significant improvement of maximum energy storage density. The high dielectric breakdown strength of 300 kV/cm, highest maximum energy storage density of 1.50 J/cm(3) and high energy storage efficiency of 88.5% were obtained in 95 wt%Ba0.4Sr0.6TiO3-5 wt%MgO composite. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1469 / 1476
页数：8
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