The microstructure of ordered Ba(Mg1/3Ta2/3)O3
The microstructure of ordered Ba(Mg1/3Ta2/3)O3
复制标题
有序Ba(Mg1/3Ta2/3)O3的显微组织
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
S. Amelinckx
中科院分区：
文献类型：
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作者：
C. Lei;G. Vantendeloo;S. Amelinckx
摘要利用直接成像、高分辨电子显微镜和选区电子衍射研究了有序钙钛矿结构Ba（Mg_（1/3）Ta_（2/3））O_3的微观结构。“单晶”被证明是在不同的结构水平破碎。立方BaO 3骨架中含有大量的孪晶和堆垛层错。该框架的单域进一步被可能发生的四个取向变体和在每个取向变体的超结构中的三个翻译变体分割。的意见是一致的假设，即在接近熔点的温度下，有序-无序转变的B-阳离子亚晶格内发生已经形成的BaO 3框架。
Abstract The microstructure of the ordered perovskite Ba(Mg1/3Ta2/3)O3 was studied by means of direct imaging, using high-resolution electron microscopy, and by means of selected-area electron diffraction. ′Single′ crystals are shown to be fragmented at different structural levels. The cubic BaO3 framework contains numerous twins and stacking faults. Single domains of this framework are further fragmented by the potential occurrence of four orientation variants and of three translation variants in each orientation variant of the superstructure. The observations are consistent with the assumption that, at a temperature close to the melting point, an order-disorder transition of the B-cation sublattice occurs within the already-formed BaO3 framework.