The Effect of Ca or Ba Substitution on the Properties in Bi0.87La0.05B0.08FeO3 (B＝Ca, Ba) Ceramics

Qing Hui Jiang; Shu Jin Zhao; Yong Xin Qi; Ping Yang

doi:10.4028/www.scientific.net/MSF.687.422

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HomeMaterials Science ForumMaterials Science Forum Vol. 687The Effect of Ca or Ba Substitution on the...

The Effect of Caor Ba Substitution on the Properties in Bi_0.87La_0.05B_0.08FeO₃ (B＝Ca, Ba) Ceramics

Abstract:

Multiferroic Bi_0.87La_0.05B_0.08FeO₃ (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, Bi_0.87La_0.05Ca_0.08FeO₃ ceramics have high breakdown field strength (220 kV/cm) and low loss (tand~2%), and the dielectric constant is stable (about 100) in the frequency between 10²and 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.

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Materials Science Forum (Volume 687)

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422-426

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https://doi.org/10.4028/www.scientific.net/MSF.687.422

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Online since:

June 2011

Authors:

Qing Hui Jiang, Shu Jin Zhao, Yong Xin Qi, Ping Yang

Keywords:

BiFeO₃, Ferroelectric, Multiferroic, Spark Plasma Sintering (SPS)

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