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首页> 外文期刊>Ferroelectrics >Effects of Bi2O3-B2O3-ZnO glass additive on structure, ferroelectric and dielectric properties of BiFeO3 ceramics
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Effects of Bi2O3-B2O3-ZnO glass additive on structure, ferroelectric and dielectric properties of BiFeO3 ceramics

机译：BiFeo3陶瓷结构，铁电和介电性能Bi2O3-B2O3-ZnO玻璃添加剂的影响

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摘要

Lead-free BiFeO3 ceramics doped with varying amounts of Bi2O3-B2O3-ZnO (BBZ) glass, that is, x wt% (x = 0.0, 0.5, 1.0, 1.5, and 2.0) were prepared via the traditional solid-state reaction route. The effects of BBZ glass content on the phase composition, microstructure, dielectric, and ferroelectric properties of BiFeO3 ceramics were investigated. X-ray diffraction results confirmed that BBZ glass doping increased the formation of secondary phases (Bi2Fe4O9 and Bi25FeO39). Scanning electron microscopy images showed that the samples with the addition of BBZ glass showed a heterogeneous size distribution of grains and more porosity. With the increase of the BBZ glass content, the fluctuation of Fe-ions was decreased and the bond strength of the Bi-O was increased. The samples with BBZ glass addition showed smaller dielectric constant and more saturated polarization hysteresis loops compared with pure BiFeO3. The Curie temperature (T-C) decreased gradually from 825.8 degrees C for x = 0.0 to 637.0 degrees C for x = 2.0. In addition, leakage current density decreased with the addition of BBZ glass. These changes of the electric properties were related to the heterogeneous size distribution of grains, the generation of secondary phases and the increase of the concentration ratios of Fe3+ and Fe2+ in BiFeO3-xBBZ samples.
机译：通过传统的固态反应途径制备掺杂有不同量的Bi2O3-B2O3-ZnO（BBZ）玻璃的无铅BifeO3陶瓷，即xwt％（x = 0.0,0.5,1.0,1.5和2.0） 。研究了BBZBZ玻璃含量对BIFEO3陶瓷的相组成，微观结构，电介质和铁电性能的影响。 X射线衍射结果证实，BBZ玻璃掺杂增加了二次相的形成（Bi2Fe4O9和Bi25FeO 39）。扫描电子显微镜图像显示，添加BBZ玻璃的样品显示出颗粒和更高孔隙率的异质尺寸分布。随着BBZ玻璃含量的增加，Fe离子的波动降低，Bi-O的键强度增加。与纯BIFEO3相比，具有BBZ玻璃添加的样品显示出较小的介电常数和更饱和的偏振磁滞回路。对于X = 2.0，居里温度（T-C）从825.8℃逐渐降低x = 0.0至637.0℃。此外，随着BBZ玻璃的添加，漏电流密度降低。电性能的这些变化与谷物的异质尺寸分布，二次相的产生和BIFEO3-XBBZ样品中Fe3 +和Fe2 +的浓度比的增加。

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