Abstract The ferroelectric domain structures were analyzed in strained multiferroic BiFeO3 ceramics via X-ray diffraction (XRD), scanning electron microscope (SEM) and electron backscatter diffraction (EBSD). XRD refinements indicate that the SPS method introduced the large strain into the ceramic samples even though ~50% strain reduction could be conducted through annealing process. The large strain increased the contents of unusual 71° ± 1° grain boundaries and deformed 71° domain walls (~89° twin boundaries) both in the as-sintered sample and the annealed sample, which could accommodate the grain boundary energy and the large thermal strain. The large strain was more conducive to form typical curved and bridge-like 180° domain morphologies. And the domain topographies heavily relied on the grain orientations.

中文翻译：

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放电等离子烧结法合成的应变 BiFeO3 陶瓷中的铁电畴结构

摘要 通过X 射线衍射(XRD)、扫描电子显微镜(SEM) 和电子背散射衍射(EBSD) 分析了应变多铁性BiFeO3 陶瓷中的铁电畴结构。XRD 改进表明 SPS 方法将大应变引入陶瓷样品，即使通过退火过程可以进行约 50% 的应变减少。大应变增加了烧结样品和退火样品中异常 71°±1° 晶界和变形 71°畴壁（~89°孪晶界）的含量，这可以容纳晶界能量和大热应变。大应变更有利于形成典型的弯曲和桥状180°畴形态。域拓扑结构严重依赖于晶粒取向。