Zhang Fuzeng, Zeng Xiangjun, Bi Daoguang, Guo Kailong, Yao Yingbang, Lu Shengguo
Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510080, China.
School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Materials (Basel). 2018 Nov 7;11(11):2208. doi: 10.3390/ma11112208.
Sm-doped BiFeO₃ (BFO) material was prepared using a modified solid-state-reaction method, which used fast heating and cooling during the sintering process. The Sm doping level varied between 1 mol % to 8 mol %. Processing parameters, such as sintering temperature and annealing temperature, were optimized to obtain high-quality samples. Based on their dielectric properties, the optimum sintering and annealing temperatures were found to be 300 °C and 825 °C, respectively. Leakage-free square-shaped ferroelectric hysteresis loops were observed in all samples. The remnant polarization was maximized in the 5 mol %-doped sample (~35 μC/cm. Furthermore, remnant magnetization was increased after the Sm doping and the 8 mol%-doped sample possessed the largest remnant magnetization of 0.007 emu/g. Our results demonstrated how the modified solid-state-reaction method proved to be an effective method for preparing high-quality BiFeO₃ ceramics, as well as how the Sm dopant can efficiently improve ferroelectric and magnetic properties.
采用改进的固态反应法制备了掺钐的铋铁氧体（BFO）材料，该方法在烧结过程中采用快速加热和冷却。钐的掺杂水平在1摩尔%至8摩尔%之间变化。优化了烧结温度和退火温度等工艺参数以获得高质量的样品。基于其介电性能，发现最佳烧结温度和退火温度分别为300℃和825℃。在所有样品中均观察到无漏电流的方形铁电滞回环。在5摩尔%掺杂的样品中剩余极化达到最大值（约35μC/cm²）。此外，掺钐后剩余磁化强度增加，8摩尔%掺杂的样品具有最大剩余磁化强度0.007emu/g。我们的结果表明改进的固态反应法如何被证明是制备高质量铋铁氧体陶瓷的有效方法，以及钐掺杂剂如何有效地改善铁电和磁性能。
