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首页> 外文期刊>Physica, C. Superconductivity and its applications >Relationship among synthesis, microstructure and properties in sinter-forged Bi-2212 ceramics
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Relationship among synthesis, microstructure and properties in sinter-forged Bi-2212 ceramics

机译：烧结锻造Bi-2212陶瓷的合成，微观结构与性能之间的关系

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摘要

High quality Bi-2212 powders were prepared using three different synthetic methods (solid state, sol-gel and polymer matrix), showing that the polymer matrix method is very promising from the point of view of the synthesis time and grain size. The Bi-2212 sintered pellets were then submitted to sinter-forging process to obtain textured ceramic discs. The discs were characterized by XRD, pole figures and SEM to determine the phase purity, the texture degree and the microstructure, respectively. Following characterization, the discs were cut into bars and annealed for 12 h at different temperatures ranging between 845 and 873 degree C to determine the best thermal treatment, whereafter they were characterized using resistivity and transport J sub(c) measurements. It has been found that most of the bars had a T sub(c) around 92 K and that transport properties can be correlated to the samples' microstructure.
机译：使用三种不同的合成方法（固态，溶胶-凝胶和聚合物基质）制备了高质量的Bi-2212粉末，从合成时间和粒度的角度来看，表明聚合物基质方法非常有前途。然后将Bi-2212烧结颗粒进行烧结锻造工艺，以获得网纹陶瓷盘。通过XRD，极图和SEM对圆盘进行表征，分别测定相纯度，织构度和显微组织。表征后，将圆盘切成条，并在845至873摄氏度之间的不同温度下退火12小时，以确定最佳热处理，然后使用电阻率和传输J sub（c）测量来表征。已经发现，大多数条具有大约92 K的T sub（c），并且传输特性可以与样品的微观结构相关。

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