Optimization of energy storage density and efficiency in BaxSr1-xTiO3 (x≤0.4) paraelectric ceramics. Issue 6 (July 2015)

• Record Type: Journal Article
• Authors: Wang, Yu; Shen, Zong-Yang; Li, Yue-Ming; Wang, Zhu-Mei; Luo, Wen-Qin; Hong, Yan
• Is Part Of: Ceramics international. Volume 41:Issue 6(2015)
• Page Start: 8252
• Page End: 8256
• Publication Date: 2015-07
• Subjects: A. Sintering -- C. Dielectric properties -- D. Perovskites -- E. Capacitors -- Energy storage; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.02.156
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Paraelectric Ba x Sr1− x TiO3 (BST, x =0, 0.2, 0.3, 0.4) ceramics with Curie temperature far below room temperature were prepared by solid state reaction route. The effect of x value on the energy storage density and efficiency of the BST ceramics was investigated. For a given electric field, the energy storage density of BST ceramics increased, but the efficiency decreased with the increase of x value. In this work, the Ba0.3 Sr0.7 TiO3 ceramics possessed an optimized energy storage density ( γ =0.23 J/cm 3 ) and efficiency ( η =95.7%) under the applied electric field of 90 kV/cm. Together with relatively high dielectric constant ( ε r =650 @1 kHz) and very low dielectric loss (tan δ =7.6×10 −4 @1 kHz), the Ba0.3 Sr0.7 TiO3 ceramics should be more suitable for solid state compact portable pulse power electronic applications.