110K铋基超导相形成的组成条件  

COMPOSITION AND FORMATION OF 110K PHASE IN Bi-Sr-Ca-Cu-O SYSTEM

作　　者：任玉芳[1] 曾左韬[1] 孟建[1] 何平[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》1991年第3期83-85,共3页Chinese Journal of Applied Chemistry

摘　　要：Bi-Sr-Ca-Cu-O超导材料中存在110K和80K2个超导相。其组成是Bi_2Sr_2Ca_2Cu_3O_y和Bi_2Sr_2CaCu_2O。但迄今为止,在按2223组成比合成的未掺杂Bi系超导材料中从未得到过纯的110K相,也未见过组成为2223,零电阻温度在100K以上材料的报道。为了探索形成110K相的最佳条件,本文以2223组成比为参考,合成了5个系列材料:Bi_xSr_2Ca_2Cu_3O_y,Bi_2Sr_xCa_2Cu_3O_y,Bi_2Sr_2Ca_xCu_3O_y,Bi_2Sr_2Ca_2Cu_xO_y,Bi_i Sr_uCa_yCu_wO_s。The effects of the composition on the formation of 110K phase, electrical and magnc-tic properties of Bi-Sr-Ca-Cu-O system (2223) have been studied. Only few 110K phasewere found in the sample with nominal 2223 composition and its superconductivity wasvery poor. Appropriatoly change of the nominal composition was in favour of the forma-tion of 110K phase. The T_c of Bi_2Sr_(1.8)Ca_(2·2)Cu_(3·2)O, was 112K.

关 键 词：超导体 BISRCACUO 超导相 铋基 

分 类 号：TM262[一般工业技术—材料科学与工程]