STOICHIOMETRY VARIATION EFFECT ON THE SUPERCONDUCTING PROPERTIES OF POLYMER-PROCESSED (BI1-XPBX)2SR2CA2CU3O10 CERAMICS

被引：16
|
作者：
SOTELO, A [1 ]
ANGUREL, LA [1 ]
RUIZ, MT [1 ]
LARREA, A [1 ]
LERA, F [1 ]
DELAFUENTE, GF [1 ]
机构：
[1] UNIV ZARAGOZA,CSIC,INST CIENCIA MAT ARAGON,MARIA LUNA 3,E-50015 ZARAGOZA,SPAIN
来源：
SOLID STATE IONICS | 1993年 / 63-5卷
关键词：
D O I：
10.1016/0167-2738(93)90210-T
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Bismuth family high-temperature superconducting samples with varying initial Pb, Sr and Ca stoichiometries have been prepared using a polymer solution synthesis method. These samples have been characterized by powder X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy and magnetic ac susceptibility. The samples which yield the highest percentage of 2223 phase have in common an excess amount of Pb and a deficiency in Sr. The sample with best intragranular properties has a stoichiometry represented by Bi1.8Pb0.35Sr1.87Ca2.1Cu3O10+delta. It is also shown that, in contrast with the intragranular properties, the intergranular properties are irreproducible in almost all the samples studied.
引用
收藏
页码：883 / 888
页数：6
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