LIQUID-PHASE ASSISTED SYNTHESIS OF SINGLE THALLIUM LAYER SUPERCONDUCTORS

被引：10

作者：

LI, YF

SHENG, ZZ

CHEN, N

机构：

[1] ILLINOIS SUPERCOND CORP,EVANSTON,IL 60201

[2] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

MATERIALS RESEARCH BULLETIN | 1994年 / 29卷 / 10期

关键词：

OXIDE; THALLIUM; CUPRATE; SUPERCONDUCTOR;

D O I：

10.1016/0025-5408(94)90087-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TlBa2Ca2Cu3Ox (Tl-1223) powder was synthesized in O2 from a mixture of Tl2O3 and Ba2Ca2Cu3Ox. The peritectic melting point of TI-1223 in O2 is 905-degrees-C. It was found that the maximum phase conversion to the Tl-1223 phase occurred at 895-900-degrees-C. A small concentration of liquid was present at that temperature. Because of the rapid kinetics of Tl-1223 formation, CaO and BaCuO2 phases became isolated from the Tl2O3 and thus remained in the final microstructure. In samples heated at 895-degrees-C, the CaO and BaCuO2 proved to be sufficiently small to act as flux-pinning sites.

引用

页码：1057 / 1064

页数：8

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