INVESTIGATIONS OF (BI/PB)-SR-CA-CU-O-BASED SUPERCONDUCTORS BY EDS ANALYSIS

被引：5

作者：

BERNIK, S

HROVAT, M

SEVER, A

CEH, M

KOLAR, D

机构：

[1] ‘Jožef Stefan’ Institute, University of Ljubljana, Ljubljana, 61000

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1994年 / 7卷 / 01期

关键词：

D O I：

10.1088/0953-2048/7/1/005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconducting ceramic materials with a nominal composition Bi1.75Pb0.25Sr2Ca2.05Cu3.05Ox were synthesized. T-c (R = 0) was 60 K (extrapolated), 105 K and 110 K for samples fired at 800 degrees C, 845 degrees C and 855 degrees C respectively. Fractured and polished surfaces were investigated by energy dispersive x-ray spectroscopy (Eos) using a standardless ZAF method and a ZAF method with standards. The volume fraction of the superconducting phase increased with increasing firing temperature. The non-superconducting phases identified in samples fired at 800 degrees G were Ca2CuO3, (Sr, Ca)Cu2O3, Ca2PbO4 and unreacted CuO. After higher firing temperatures only Ca2CuO3 and (Sr, Ca)Cu2O3 remained. The EDS results showed that the composition of the high-T-c phase differed from the 'ideal' 2223 (Bi0.66Sr0.66Ca0.66CuOx) composition which was attributed to the formation of solid solutions between the low-T-c and the high-T-c phases.

引用

页码：19 / 23

页数：5

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