SINTER CONDITIONS AND SUPERCONDUCTING PROPERTIES OF BI-PB-SR-CA-CU-O SUPERCONDUCTORS

被引：11

作者：

ULLRICH, M

SCHAPER, W

FREYHARDT, HC

机构：

[1] Inst. fur Metallphys., Gottingen

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1990年 / 3卷 / 12期

关键词：

D O I：

10.1088/0953-2048/3/12/006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In high-T(c) Bi(Pb)SrCaCuO pellets prepared by solid state reaction, a prolonged sintering increases the fraction of the 2223 high-T(c) phase. In addition the upper critical field, B(c2)*, is enhanced due to an improved long-range order and stoichiometry. Nevertheless the critical current density becomes smaller in weak fields with sintering time because of the two-dimensional growth of the high-T(c) phase, leading to a lower mechanical density. In the high-field region the magnetic field dependence of the critical current density, J(c), becomes less pronounced with reaction time as a result of the higher B(c2)*. Thus, densification would improve J(c) in all fields for long sintering periods.

引用

页码：602 / 605

页数：4

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