The effect of Ca or Ba substitution on the properties in Bi0.87La0.05B0.08FeO3 (B=Ca, Ba) ceramics

摘要：

Multiferroic Bi0.87La0.05B0.08FeO3 (B=Ca2＋, Ba2＋) ceramics were prepared by sol-gel method and spark plasma sintering with the protection of CeO2 powders. The substitution of Ba increases the samples’ magnetic properties, which leads to higher leakage current and makes the bulk ceramics high dielectric loss (0.1-0.2). In contrast, Bi0.87La0.05Ca0.08FeO3 ceramics have high breakdown field strength (220 kV/cm) and low loss (tanδ~2％), and the dielectric constant is stable (about 100) in the frequency between 102 and 106 Hz. Meanwhile, Ca doping improves the ceramic coercive field and ferroelectric domains do not switch under 220 kV/cm, leading to slim ferroelectric loops.

关键词： multiferroic BiFeO3 spark plasma sintering ferroelectric

作者: Qinghui Jiang Shujin Zhao Yongxin Qi Ping Yang

作者单位: School of Materials Science and Engineering, University of Jinan, Shandong 250022, China College of Materials Science and Engineering, Jiamusi University, Heilongjiang 154007, China School of Materials Science and Engineering, Shandong University, Shandong 250014, China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 422-426

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）