The structural characteristics of Bi-based 2212 phase whiskers
โ Scribed by Shi Lei; Li Fanqing; Jia Yunbo; Zhou Guien; Ge Yunlong; Zhang Yuheng
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 529 KB
- Volume
- 203
- Category
- Article
- ISSN
- 0921-4534
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โฆ Synopsis
We have succeeded in studying the structural characteristics of a single thread of Bi-based 22 12-phase whisker by X-ray diffraction. It is found that the structural characteristics of a single thread of whisker coincide with those of a 2212-phase single crystal. The single thread of whisker is a 2212 plate-like single crystal and is stacked in a layered structure. There are a number of lowangle boundaries in the BC-plane, but few in the AB-plane of the whisker.
๐ SIMILAR VOLUMES
The crystal structure of Bi-2212 phase was studied by transmission electron microscopy. Two Bi-2212 specimens with different Sr/Ca ratios have the same displacive incommensurate Bi modulation vector q---0.21 b\*+ c\* but exhibit different superconducting critical temperatures T c. Typical structural
A single phase of Bi-rich Bi2.o6Sr2.o3Cao.98Cul.98Oy was prepared, and the oxygen nonstoichiometry Ay, critical temperature Tc and low-and high-temperature conductivities or were determined. The results were compared to those of the Cu-rich 2212 phase. Bi-rich oxide has shown a narrower Ay than Cu-r