Infiltration Growth and Crystallization Characterization of Single-Grain Y–Ba–Cu–O Bulk Superconductors
Infiltration Growth and Crystallization Characterization of Single-Grain Y–Ba–Cu–O Bulk Superconductors
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DOI：
10.1021/cg301703t
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发表时间：
2013-02
影响因子：
3.8
通讯作者：
Guo-Zheng Li;Dejun Li;Xiangyun Deng;Jian-hua Deng;Wanmin Yang
中科院分区：
文献类型：
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作者：
Guo-Zheng Li;Dejun Li;Xiangyun Deng;Jian-hua Deng;Wanmin Yang
采用改进的渗透生长（IG）技术制备了一系列单晶Y-Ba-Cu-O （YBCO）块状超导体，并详细研究了样品的形貌特征与内部结晶结构的关系。实验结果表明，随着慢冷时间的延长，YBCO单晶粒尺寸增大。在生长48 h的YBCO试样截面上观察到弯曲的A /c生长扇形边界，这是由慢冷生长过程中Ra/Rc比的变化引起的，其中Ra和Rc分别代表A轴和c轴方向的生长速率。此外，不同工艺制备的样品呈现出不同的侧表面形貌（SSM）模式，这源于YBCO单晶粒结晶结构的差异，并可分为四类。另一方面，对于一个确定的内结晶结构，样品大小的变化…
A series of single-grain Y–Ba–Cu–O (YBCO) bulk superconductors were fabricated using a modified infiltration growth (IG) technique, and the morphology feature associated with the inner crystallization structure of the samples was investigated in detail. Experimental observations indicated that YBCO single grains grew much larger with the increasing slow-cooling time. A bended a/c growth sector boundary was observed in the cross section of the YBCO sample grown for 48 h, which resulted from the variations in the Ra/Rc ratio during the slow-cooling growth process, where Ra and Rc represent the growth rate in the a axis and c axis direction, respectively. In addition, different side surface morphology (SSM) patterns were presented for the samples fabricated with different processings, which originated from the difference in the crystallization structure of the YBCO single grains and could be divided into four groups. On the other hand, for a defined inner-crystallization structure, the changes of sample size...