采用传统固相反应法与两步合成法制备了PrBi4Fe0.5Co0.5Ti3O15陶瓷, 研究了Pr与Co共掺杂对Bi5FeTi3O15陶瓷的结构、磁性能以及介电性能的影响.X射线衍射分析显示, 传统固相反应法制备的样品比两步法制备的样品更容易形成单相结构.铁电和磁性测量证明样品具有多铁性, 并且Pr与Co共掺杂能大幅提高材料的磁性能, 固相反应法与两步合成法制备的样品在室温下的剩余磁化强度(2Mr)分别为0.315, 0.576 Am2/kg,比文献报道的Bi5FeTi3O15陶瓷的2Mr( 2.7×10-6 Am2/kg )高5个数量级,比掺Co的Bi5Fe0.5Co0.5Ti3O15陶瓷2Mr( 7.8×10-3 Am2/kg )高2个数量级.
PrBi4Fe0.5Co0.5Ti3O15 compounds were prepared either by conventional solid-state reaction method or by two-step method. X-ray diffraction analyses indicate that the PrBi4Fe0.5Co0.5Ti3O15samples which were synthesized by the conventional solid-state reaction method favors the formation of single phase four-layer Aurivillius phase more easily than the samples prepared by the two-step method. The multiferroic properties of the samples at room tempera-ture were demonstrated by ferroelectric and magnetic measurements. The samples exhibit significantly enhanced magnetic properties by Pr/Co co-substitution. The remnant magnetization (2Mr) of the samples prepared by the con-ventional solid-state reaction and two-step methods are 0.315 and 0.576 Am2/kg, respectively, approximately five or-ders larger than that of the reported Bi5FeTi3O15 ceramics (2.7×10-6 Am2/kg) and two orders of the reported Co-doped Bi5FeTi3O15 ceramics (7.8×10-3 Am2/kg).
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