Abstract 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 (TC) decreased gradually from 825.8 °C for x = 0.0 to 637.0 °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.

中文翻译：

---

Bi2O3-B2O3-ZnO玻璃添加剂对BiFeO3陶瓷结构、铁电和介电性能的影响

摘要 无铅 BiFeO3 陶瓷掺杂不同量的 Bi2O3–B2O3–ZnO (BBZ) 玻璃，即 x wt% (x = 0.0、0.5、1.0、1.5 和 2.0) 通过传统的固态反应制备路线。研究了 BBZ 玻璃含量对 BiFeO3 陶瓷的相组成、微观结构、介电和铁电性能的影响。X 射线衍射结果证实 BBZ 玻璃掺杂增加了第二相（Bi2Fe4O9 和 Bi25FeO39）的形成。扫描电子显微镜图像显示，添加 BBZ 玻璃的样品显示出颗粒的不均匀尺寸分布和更多的孔隙率。随着BBZ玻璃含量的增加，Fe离子的波动减小，Bi-O的结合强度增加。与纯 BiFeO3 相比，添加 BBZ 玻璃的样品显示出更小的介电常数和更饱和的极化滞后回线。居里温度 (TC) 从 x = 0.0 的 825.8 °C 逐渐降低到 x = 2.0 的 637.0 °C。此外，漏电流密度随着BBZ玻璃的加入而降低。这些电学性质的变化与BiFeO3-xBBZ样品中晶粒的不均匀尺寸分布、第二相的生成以及Fe3+和Fe2+浓度比的增加有关。