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Optimum heat treatment to enhance the weak-linkresponse of Y123 nanowires prepared by SolutionBlow Spinning
Superconductor Science and Technology ( IF 3.6 ) Pub Date : 2021-01-12 , DOI: 10.1088/1361-6668/abc8d2
Ana M Caffer 1 , Davi A D Chaves 2 , Alexsander L Pessoa 1 , Claudio L Carvalho 1 , Wilson A Ortiz 2 , Rafael Zadorosny 1 , Maycon Motta 2
Affiliation  

Although the production of YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ (Y123) has been extensively reported, there is still a lack of information on the ideal heat treatment to produce this material in the form of one dimension nanostructures. Thus, by means of the Solution Blow Spinning technique, metals embedded in polymer fibers were prepared. These polymer composite fibers were fired and then investigated by thermogravimetric analysis. The maximum sintering temperatures of heat treatment were chosen in the interval \SI{850}{\celsius}-\SI{925}{\celsius} for one hour under oxygen flux. SEM images allowed us to determine the wire diameter as approximately 350~nm for all samples, as well as to map the evolution of the entangled wire morphology with the sintering temperature. XRD analysis indicated the presence of Y123 and secondary phases in all samples. Ac magnetic susceptibility and dc magnetization measurements demonstrated that the sample sintered at \SI{925}{\celsius}/1h is the one with the highest weak-link critical temperature and the largest diamagnetic response.

中文翻译:

提高SolutionBlow Spinning制备的Y123纳米线弱连接响应的最佳热处理

尽管 YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ (Y123) 的生产已被广泛报道,但仍然缺乏关于生产的理想热处理的信息这种材料以一维纳米结构的形式存在。因此,通过溶液吹塑技术,制备了嵌入聚合物纤维中的金属。这些聚合物复合纤维被烧制,然后通过热重分析进行研究。热处理的最高烧结温度在\SI{850}{\celsius}-\SI{925}{\celsius}区间内选择,在氧通量下加热1小时。SEM 图像使我们能够确定所有样品的线直径约为 350 纳米,并绘制出缠结线形态随烧结温度的演变。XRD 分析表明所有样品中都存在 Y123 和第二相。
更新日期:2021-01-12
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