采用柠檬酸盐自燃烧法制备Bi0.9Dy0.1FeO3粉体,溶液法合成xBi0.9Dy0.1FeO3-（1-x）CoFe2O4复合粉体,得到了同时具有铁电性能和铁磁性能的铁酸铋基多铁性材料。研究了粉体的微观结构、铁电性能和铁磁性能。结果表明：当x从0.9减少到0.4,在最佳煅烧温度合成的Bi0.9Dy0.1FeO3-CoFe2O4复合粉体的磁极化强度和剩余极化强度都随着x先增大后减少。Bi0.9Dy0.1FeO3与CoFe2O4复合使铁电性能和铁磁性能均有所提高,当x=0.5时,在700℃的煅烧温度下,获得较好的铁电和铁磁性能,其中Vc=3 268.241Oe,Ms=37.05emμ/g。
Bismuth ferrite-based material xBi0.9Dy0.1FeO3-（1-x） CoFe2O4 composites were fabricated via an aqueous method,and Bi0.9Dy0.1FeO3 powder was prepared by sol-gel auto-combustion.Microstructure,ferroelectricity and ferromagnetism of the samples were studied.It is showed that the samples exhibit both ferroelectricity and ferromagnetism.The magnetic polarization intensity and the remnant polarization vary with x.When x=0.5,the samples have the best ferroelectricity and ferromagnetism at 700℃ with Vc=3 268.241 Oe,Ms=37.05emμ/g.
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