用于高储能应用的 SrTiO-BiNaTiO-BaAlNbO 无铅陶瓷的介电和铁电性能
Dielectric and Ferroelectric Properties of SrTiO-BiNaTiO-BaAlNbO Lead-Free Ceramics for High-Energy-Storage Applications.
作者信息
Yan Fei, Yang Haibo, Lin Ying, Wang Tong
机构信息
School of Materials Science and Engineering, Shaanxi University of Science and Technology , Weiyang District, Xi'an 710021 China.
出版信息
Inorg Chem. 2017 Nov 6;56(21):13510-13516. doi: 10.1021/acs.inorgchem.7b02181.
Pulsed capacitors require high-recoverable energy-storage density (W) and high energy-storage efficiency (η), which can be realized through the selection and adjustment of the composition. In this work, (1 - x)SrTiO-x(0.95BiNaTiO-0.05BaAlNbO) [(1 - x)ST-x(BNT-BAN)] ceramics were successfully prepared via the pressureless solid-state reaction method. The dielectric constant increases gradually with the introduction of BNT-BAN and obtains a maximum value of 3430 with the composition of 0.4ST-0.6(BNT-BAN) at 100 Hz, which is 10.39 times higher than that of the pure ST sample (∼330). Dispersive relaxor behaviors and ferroelectric performances can be enhanced with the introduction of BNT-BAN. The composition of 0.5ST-0.5(BNT-BAN) exhibits a high W of 1.89 J/cm as well as a high η of 77%. Therefore, the (1 - x)ST-x(BNT-BAN) systems are candidate materials for pulsed capacitor applications.
脉冲电容器需要高可恢复储能密度（W）和高储能效率（η），这可以通过成分的选择和调整来实现。在本工作中，通过无压固态反应法成功制备了(1 - x)SrTiO₃-x(0.95BiNaTiO₃-0.05BaAlNbO₃) [(1 - x)ST-x(BNT-BAN)]陶瓷。随着BNT-BAN的引入，介电常数逐渐增加，在100 Hz下，当组分为0.4ST-0.6(BNT-BAN)时，介电常数达到最大值3430，这比纯ST样品（约330）高10.39倍。随着BNT-BAN的引入，弥散弛豫行为和铁电性能可以得到增强。0.5ST-0.5(BNT-BAN)的成分表现出1.89 J/cm³的高W以及77%的高η。因此，(1 - x)ST-x(BNT-BAN)体系是脉冲电容器应用的候选材料。
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