Sr_3Cu_5O_(8+x)和CaSrCu_5O_(5+x)的结构和电学性质  

THE STRUCTRUE AND ELECTRIC PROPERTY OF Sr_3Cu_5O_(8+x)AND CaSrCu_3O_(5+x)

作　　者：孟建[1] 曾左韬[1] 任玉芳[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》1990年第4期86-89,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金

摘　　要：继Y-Ba-Cu-O之后,具有更高T_5的Bi-Sr-Ca-Cu-O(简称BSCCO)体系的发现引起了人们对高温超导研究的兴趣。研究表明,在BSCCO中存在110K和80K2个超导相。由于在制备BSCCO过程中存在复杂的Ca、Sr和Cu复合氧化物。The compounds with the compositions of Sr_3Cu_5O_8 +x and CaSrCu_3O_5+x have been syn-thesized by solid phase reaction method. The crystal structures of both compounds are or-thorhombic with a = 3. 950A, b = 11.479A and c = 13.420A for Sr_3Cu_5O_8 +x and a = 6.489A,b = 11. 280 A and c = 12. 240A for CaSrCu_3O_(5 + x), respectively. The oxygen content and oxida-ation state of copper ion were analysized by the iodometric titration. The electric propertymeasurement indicates that both compounds are p-type semiconductor and have lower resis-tivity. They decomposes at around 936℃.

关 键 词：超导体 Sr3Cu5O8+x CaSrCu5O5+x 

分 类 号：TM262[一般工业技术—材料科学与工程]