SINGLE-PHASE REGION OF THE 2212-BI-SR-CA-CU-O SUPERCONDUCTOR

被引：29

作者：

KNIZEK, K

POLLERT, E

SEDMIDUBSKY, D

HEJTMANEK, J

PRACHAROVA, J

机构：

[1] Institute of Physics, Academy of sciences of Czech republic

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1993年 / 216卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(93)90656-B

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The phase relationships and solid-solution region of the Bi2Sr2CaCu2O8+delta (2212) superconductor were investigated at 850-degrees-C under air atmosphere in a cross-section of the system Bi-Sr-Ca-Cu-(O) defined by the formula Bi2+ySr3-y-xCaCu2O8+delta. The system was studied by means of XRD and EMA and an approximate position of the 2212 single-phase region is delimited by the values of y=0.1 and 0.8 less-than-or-equal-to x less-than-or-equal-to 1.3. The single-phase region determined may be divided into two subregions, Sr-rich in the range 0.8 less-than-or-equal-to x less-than-or-equal-to 1.0 and Ca-rich in the range 1.1 less-than-or-equal-to x less-than-or-equal-to 1.3, these differing in the number and character of intergrowths. The highest superconducting transition temperature (T(c)) was found for x=0.8.

引用

页码：211 / 218

页数：8

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