Directional Solidification and Superconductive Transition of Bi2Sr2 CaCu2O8+δ

被引：0
|
作者：
张成
张济山
葛云龙
胡壮麒
机构：
[1] 110015.China
[2] Institute of Metal Research Academia Sinica
[3] Shenyang
来源：
Journal of Materials Science & Technology | 1992年 / 05期
基金：
中国国家自然科学基金;
关键词：
Bi-Sr-Ca-Cu-O; system; directional; solidification; superconductive transition;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
By laser heated pedestal growth method,Bi;Sr;CaCu;O;as-grown fibers with differentmorphologies were solidified in non-equilibriumcondition at the rates of 0.1～14mm/min.At lowrates,a(Sr;Ca;)CuO;phase with long andstraight strips in shape and a white Cu-rich phasehaving a morphology of globular shape were found.With the increase of solidification rates,the phase(Sr;Ca;)CuO;becomes thinner and the Cu-richphase becomes smaller and dispersive.When thesolidification rates were last.another unstablephase(Sr;Ca;)Cu;O;occurred.In fact,the tran-sition of the semiconductive as-grown fiber to thesuperconductor is a peritectoid reaction influencedby the annealing temperature and time.
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页码：353 / 358
页数：6
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