FORMATION MECHANISM OF 110-K HIGH-TC SUPERCONDUCTING PHASE IN THE CA-RICH AND CU-RICH BI-PB-SR-CA-CU-O SYSTEM

被引:43
作者
HUANG, YT [1 ]
SHEI, CY [1 ]
WANG, WN [1 ]
CHIANG, CK [1 ]
LEE, WH [1 ]
机构
[1] CHUNG SHAN INST SCI & TECHNOL, TAOYUAN 32526, TAIWAN
来源
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1990年 / 169卷 / 1-2期
关键词
D O I
10.1016/0921-4534(90)90291-L
中图分类号
O59 [应用物理学];
学科分类号
摘要
The starting compositions of Bi1.7Pb0.4Sr2-xCa2+xCu3.6Oy (x≥0) have been studied to illustrate the formation mechanism of 110 K superconducting phase. It was proposed that a reactive liquid-phase-aided sintering process is responsible for the promotion of 110 K phase in the Pb-doped Bi-Sr-Ca-Cu-O system. The Ca-rich stoichiometry containing more Ca2PbO4 in calcined powder would result in more reactive liquid phase during the sintering period. The acceleration of the formation of 110 K phase and large grain growth were observed. A nearly monophasic 110 K superconducting phase can be easily obtained within 20 h when appropriate stoichiometry and sintering conditions were met. © 1990.
引用
收藏
页码:76 / 80
页数:5
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