利用SEM时BPSCC超导片的形貌的研究

Morphologic Study on BPSSC Superconductor Disk by SEM

本文首次报道利用扫描电子显微镜对Bi系超导片的原始材料和在810℃下预烧20小时,再在840℃下分别进行12小时,30小时,48小时的退火处理后的超导体片的显微结构观察结果。可以直观地看到烧结后超导片的表面形态以及经过不同的退火时间后的超导片的晶粒形成过程。实验发现,其材料表面在形成超导过程中其形态发生很大变化,通过XRD证实其超导相形成也不同,其结构为片状结构。同时也发现,烧结温度和退火时间对超导相形成多少影响很大。

In this paper, the obsered results, of micro structure of Bi-based superconductor is first given at 810℃, 840℃ temperature and different time of sintering by SEM. We can diretview that the change of surface appearance of supercomductor' is obvious. In the experiment, the difference of caused superconductor phase can be confirmed by X -ray diffractograms. The structure of superconductor is flake.