中文摘要：

以TiO2、Fe2O3和Bi2O3为原料,采用固相反应法分别在975、1 000、1 025、1 050℃下烧结制备Bi5Ti3FeO15（BTFO）多铁陶瓷.X线衍射结果显示,不同烧结温度制备的BFTO陶瓷均为单一的层状钙钛矿相.随着烧结温度的升高,BTFO陶瓷的晶粒尺寸增大,致密度提高.扫描电镜的结果表明1 050℃烧结的陶瓷样品,晶粒尺寸约为15μm,具有最大的剩余极化Pr值18.6μC/cm^2.BTFO陶瓷在室温下为顺磁性,同时具有一定的磁电耦合特性,磁场为725 Oe、频率50Hz下测得的磁电耦合系数达到3.7 m V/cm Oe.

英文摘要：

Bi5Ti3FeO15（BTFO） multiferroic ceramics were prepared by solid state reaction method using TiO2,Fe2O3 and Bi2O3 powders as raw materials. The sintering temperatures were 975 ℃ 、1 000 ℃ 、1 025 ℃ 、1 050 ℃,respectively. The results of X-ray diffraction indicate all samples at different sintering temperatures are single-phase bismuth layered perovskites. With the increase of sintering temperature,the BTFO ceramics exhibit high density and large grain size. Scanning electron microscopy result shows that the grain size of BTFO ceramic sintered at 1 050 ℃ is approximately 15 μm. The largest remnant polarization of these prepared ceramics is about 18. 6 μC/cm~2. BTFO ceramics show a paramagnetic feature at room temperature. The magnetoelectric coupling coefficient were measured to be 3. 7 m V/cm Oe at 50 Hz and H = 800 Oe for the BTFO ceramics sintered at 1 050 ℃.