High-Energy Density Capacitors Utilizing 0.7 BaTiO3-0.3 BiScO3 Ceramics
High-Energy Density Capacitors Utilizing 0.7 BaTiO3-0.3 BiScO3 Ceramics
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DOI：
10.1111/j.1551-2916.2009.03104.x
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发表时间：
2009-08-01
影响因子：
3.9
通讯作者：
Trolier-McKinstry, Susan
中科院分区：
文献类型：
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作者：
Ogihara, Hideki;Randall, Clive A.;Trolier-McKinstry, Susan
高的温度稳定的介电常数（从0度到300摄氏度类似于1000）加上高电阻率（在250摄氏度类似于10（12）中心点cm）使得0.7 BaTiO 3 -0.3 BiScO 3陶瓷成为在高温下工作的高能量密度电容器的有吸引力的候选者。制备了单介质层电容器以确认BaTiO 3-BiScO 3用于该应用的可行性。发现在室温下，在73 kV/mm的电场下可以实现约6.1 J/cm（3）的能量密度，这比典型的商业X7 R电容器好上级。此外，高能量密度值保持到300摄氏度。这表明BaTiO 3-BiScO 3陶瓷在高温储能方面具有传统电容器材料所不具备的优势，进一步改善其微观结构和组成，有望为电力电子电容器提供现实的解决方案。
A high, temperature-stable dielectric constant (similar to 1000 from 0 degrees to 300 degrees C) coupled with a high electrical resistivity (similar to 10(12) center dot cm at 250 degrees C) make 0.7 BaTiO3-0.3 BiScO3 ceramics an attractive candidate for high-energy density capacitors operating at elevated temperatures. Single dielectric layer capacitors were prepared to confirm the feasibility of BaTiO3-BiScO3 for this application. It was found that an energy density of about 6.1 J/cm(3) at a field of 73 kV/mm could be achieved at room temperature, which is superior to typical commercial X7R capacitors. Moreover, the high-energy density values were retained to 300 degrees C. This suggests that BaTiO3-BiScO3 ceramics have some advantages compared with conventional capacitor materials for high-temperature energy storage, and with further improvements in microstructure and composition, could provide realistic solutions for power electronic capacitors.