%0 Journal Article
%T THE FORMATION MECHANISM OF HIGH-Tc PHASE IN Bi-BASED SUPERCONDUCTOR<br>Bi系超导体高Tc相的形成机制
%A QIU XIN-LIANG
%A LI CHENG-REN
%A XIN MIAN-RONG
%A LUO CHANG-XUN
%A <br>裘新良
%A 辛绵荣
%A 罗长勋
%A 李成仁
%J 物理学报
%D 1992
%I 
%X In this paper, the formation process of high-Tc phase in Bi-based supercondutor is investigated by X-ray diffraction etc. The high-Tc phase might be formed in the following manner. At first, the nuclei of hig-Tc (2223) phase are formed by the reaction of Sr-Ca-Cu oxide with low-Tc (2212) phase; Then the nuclei of 2223 phase grows, following the manner of ordinary crystal growth. There are two ways to form Sr-Ca-Cu oxide. One is accomplished by solid state reaction between Ca2CuO3 and Ca3(1-x)Sr3xCu5O8, and the other by liquid-state reaction of Ca2PbO4, 2212 phase and CuO. The liquid-state reaction rate is much quicker than that of solid state reaction. So, the rate of formation of 2223 nuclei can be accderated in liquid-state reaction. Based on this mechanism, we propose that Pb can only accelerate the nucleation of 2223 phase and exert no significant influence on the growth of 2223 phase.
%K 铋
%K 超导体
%K 高Tc
%K 相
%K 形成
%K 机制
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1150A4EB01A57B3770360D0B1C140C52&yid=F53A2717BDB04D52&vid=2001E0D53B7B80EC&iid=E158A972A605785F&sid=95F0D0DE8CD6F434&eid=BBA8B1249CDAA6CE&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=2