OXYGEN NONSTOICHIOMETRY OF 2223-PHASE BI-PB-SR-CA-CU-O SYSTEM SUPERCONDUCTING OXIDE

被引：62

作者：

IDEMOTO, Y

ICHIKAWA, S

FUEKI, K

机构：

[1] Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Noda-shi, Chiba, 278

来源：

PHYSICA C | 1991年 / 181卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90351-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The oxygen nonstoichiometry of Bi1.74Pb0.27Sr1.86Ca2.09Oy (2223 phase) was determined as a function of temperature and oxygen partial pressure under the condition that Ca2PbO4 was not formed. It was also found that PbO evaporated from the 2223 phase about 700-degrees-C in a low oxygen pressure range. Below about 700-degrees-C, the dependences of oxygen content on both temperature and oxygen partial pressure were weak, whereas they were strong above 700-degrees-C. The effect of PbO content on properties of the 2223 phase was studied by allowing PbO to evaporate under 500-degrees-C and 800-degrees-C in oxygen of 0.01 atm for different annealing periods. It was found that the critical temperature and the valences of copper and bismuth remained constant in spite of a loss of PbO.

引用

页码：171 / 178

页数：8

共 9 条

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