Enhancing energy storage density of (Ba, Sr)TiO3 ceramic particles by coating with Al2O3 and SiO2
Enhancing energy storage density of (Ba, Sr)TiO3 ceramic particles by coating with Al2O3 and SiO2
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DOI：
10.1007/s10854-013-1248-5
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Jinwen Wang;Chao Xu;B. Shen;J. Zhai
中科院分区：
文献类型：
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作者：
Jinwen Wang;Chao Xu;B. Shen;J. Zhai
研究了Ba 0. 4Sr 0. 6 TiO 3颗粒表面包覆Al 2 O3和SiO2氧化物后的介电和储能性能。结果表明，复合材料的介电性能和储能密度得到了明显的提高。储能密度的提高可以归因于两个因素：一是孔隙率和缺陷的减少显著提高了击穿强度;二是晶粒尺寸的减小。此外，优化后的组成显示出最大储能密度为5.09 J/cm 3，而未涂覆的Ba0.4Sr0.6TiO3的储能密度仅为0.24 J/cm 3。
The dielectric and energy storage properties of Ba0.4Sr0.6TiO3particles coated by Al2O3and SiO2oxide were investigated. Results showed that the dielectric properties and energy storage density were improved apparently. The improvement of the energy storage density can be ascribed to two factors: one was that the breakdown strength was notably improved by the decrease of the porosity and defects; the other was the reduction of the grain size. Furthermore, the optimized composition showed the maximum energy storage density of 5.09 J/cm3, whereas the energy storage density of uncoated Ba0.4Sr0.6TiO3was only 0.24 J/cm3.