Large energy storage density in BiFeO3-BaTiO3-AgNbO3 lead-free relaxor ceramics. Issue 8 (July 2020)

• Record Type: Journal Article
• Authors: Sun, Haonan; Wang, Xiangjian; Sun, Qinzao; Zhang, Xiaoxiao; Ma, Zhuang; Guo, Mengyao; Sun, Buwei; Zhu, Xiaopei; Liu, Qida; Lou, Xiaojie
• Is Part Of: Journal of the European Ceramic Society. Volume 40:Issue 8(2020)
• Page Start: 2929
• Page End: 2935
• Publication Date: 2020-07
• Subjects: Energy storage -- Bismuth ferrite -- Lead-free ceramics -- Relaxor -- Ferroelectrics -- Thermal stability; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.03.012
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Lead-free (0.70- x )BiFeO3 -0.30BaTiO3 - x AgNbO3 +5‰mol CuO (abbreviated as BF-BT- x AN) ceramics were fabricated using a modified thermal quenching technique. BF-BT- x AN ceramics are of a perovskite structure with morphotropic phase boundary (MPB) and show strong relaxor properties. Remarkably, the high recoverable energy storage density of 2.11 J/cm 3 is obtained for BF-BT- x AN with x = 0.14. For the x = 0.14 ceramics, its energy storage efficiency is as high as 84 % at relative low field of 195 kV/cm, together with an outstanding thermal stability in a broad temperature range from 25 °C to 150 °C. In addition, this ceramic maintains superior energy storage performance even after 8 × 10 4 electrical cycles due to its high densification after doping Ag2 O and Nb2 O5 . The result suggests that lead-free BF-BT- x AN ceramics may be promising candidate for dielectric energy storage application.