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采用固相合成法分别制备了尖晶石结构Co Fe_2O_4和钙钛矿结构Ba Ti O_3粉末,烧结得到x Co Fe_2O_4/(1―x)Ba Ti O_3(x=0.2,0.4,0.6,0.8)复相多铁材料,对材料的成分、介电性能、铁电性、磁性能进行了表征。结果表明:当x=0.2时所得的复相多铁材料两相共存,无杂相,而其他组分均不同程度地存在杂相。复相多铁材料x Co Fe_2O_4/(1―x)Ba Ti O_3具有铁电性和铁磁性,且性能受铁磁相含量影响明显。随铁磁相组分增加,材料介电常数变小,漏电流增大,铁电性能变差;同时,铁磁相间颗粒接触面积增大,磁化作用得到加强,材料磁性能得到提升。
The spinel structure Co Fe 2 O 4 and the perovskite structure Ba Ti O 3 powder were prepared by the solid phase synthesis method respectively and sintered to form x Co Fe 2 O 4 / (1-x) Ba Ti O 3 (x = 0.2,0.4,0.6,0.8) complex Phase iron material, the composition of the material, dielectric properties, ferroelectric, magnetic properties were characterized. The results show that when x = 0.2, the two phases of the multi-phase multiferroic material coexist without heterogeneous phase, while the other components all have heterogeneous phases to some extent. The multiphase multiferroic x Co Fe 2 O 4 / (1-x) Ba Ti O 3 has ferroelectric and ferromagnetic properties, and its properties are obviously affected by the content of ferromagnetic phase. With the increase of the composition of the ferromagnetic phase, the material dielectric constant becomes smaller, the leakage current increases, the ferroelectric properties become worse; at the same time, the contact area between the ferromagnetic phase particles increases, the magnetization is strengthened, and the magnetic properties of the material are improved.