Effect of crystallization temperature on dielectric and energy-storage properties in SrO-Na2O-Nb2O5-SiO2 glass-ceramics

被引：32
作者：
Wang, Haitao [1 ,2 ]
Liu, Jinhua [1 ,3 ]
Zhai, Jiwei [1 ]
Shen, Bo [1 ]
Pan, Zhongbin [1 ]
Liu, Jing Ran [1 ]
Yang, Ke [1 ]
机构：
[1] Tongji Univ, Key Lab Adv Civil Engn Mat, Minist Educ, Funct Mat Res Lab,Sch Mat Sci & Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China
[2] China Three Gorges Univ, Coll Mat & Chem Engn, Key Lab Inorgan Nonmetall Crystalline & Energy Co, Yichang 443002, Peoples R China
[3] Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 12期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Glass-ceramic; Breakdown strength; Energy-storage density; Discharge efficiency; POLYMER NANOCOMPOSITES; DISCHARGE EFFICIENCY; DENSITY; RATIO; MICROSTRUCTURES; TITANATE; KINETICS; SYSTEM;
D O I：
10.1016/j.ceramint.2017.04.026
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：
The SrO-Na2O-Nb2O5-SiO2 (SNNS) glass-ceramics were prepared through the melt-quenching combined with the controlled crystallization technique. XRD results showed Sr6Nb10O30, SrNb2O6, NaSr2Nb5O15 with tungsten bronze structure and NaNbO3 with the perovskite structure. With the decrease of crystallization temperature, dielectric constant firstly increased and then decreased, while breakdown strength (BDS) was increased. High BDS of the glass-ceramics is attributed to the dense and uniform microstructure at low crystallization temperature. The optimal dielectric constant of 140 +/- at 900 degrees C and BDS of 2182 +/- 129 kV/cm at 750 degrees C were obtained in SNNS glass-ceramics. The theoretical energy-storage density was significantly improved up to the highest value of 15.2 +/- 1.0 J/cm(3) at 800 degrees C, which is about 5 times than that at 950 degrees C. The discharged efficiency increased from 65.8% at 950 degrees C to 93.6% at 750 degrees C under the electric field of 500 kV/cm by decreasing crystallization temperature.
引用
收藏
页码：8898 / 8904
页数：7
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