Thermal annealing effects on the energy storage properties of BST ceramics.

Authors :: Song, Zhe
Liu, Hanxing
Lanagan, Michael T
Zhang, Shujun
Hao, Hua
Cao, Minghe
Yao, Zhonghua
Fu, Zhenxiao
Huang, Kun
Source :: Journal of the American Ceramic Society; Aug2017, Vol. 100 Issue 8, p3550-3557, 8p, 1 Diagram, 4 Charts, 4 Graphs
Publication Year :: 2017
Abstract: Thermal annealing treatments with different atmospheres (air, oxygen, and reducing atmospheres, respectively) were employed for the conventionally sintered (Ba<subscript>0.4</subscript>Sr<subscript>0.6</subscript>)TiO<subscript>3</subscript> (BST) ceramics. The effect of thermal annealing on the energy storage properties of BST ceramics was investigated, where oxygen vacancies played an important role. The dielectric loss, bulk resistivity and dielectric breakdown strength (BDS) were found to be sensitive to the annealing process, leading to the different energy densities in the range of 0.30-0.80 J/cm<superscript>3</superscript>. Temperature-dependent dielectric measurement and thermally stimulated depolarization current analysis were conducted to understand the impacts of oxygen vacancies on the macroscopic properties, which were found to be closely associated with the annealing conditions. [ABSTRACT FROM AUTHOR]