INFLUENCE OF GRANULARITY ON THE CRITICAL-CURRENT DENSITY IN MELT-CAST PROCESSED BI2SR2CACU2OX

被引：36

作者：

ELSCHNER, S ^{[1
]}

BOCK, J ^{[1
]}

BESTGEN, H ^{[1
]}

机构：

[1] HOECHST AG,DIV CHEM,W-5030 HURTH,GERMANY

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1993年 / 6卷 / 06期

关键词：

D O I：

10.1088/0953-2048/6/6/005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microstructural analysis of melt-cast processed Bi2Sr2CaCu2Ox reveals the existence of grain boundaries on two different length scales. Plate-shaped crystal grains of approximately 10 mum length are textured along the c direction on a scale of 200-300 mum, forming bundles of arbitrary orientation. To investigate the impact of the grain boundaries within and between bundles on the critical current density we have analysed the variation of the magnetic hysteresis with the sample size using different powder fractions and bulk material. It could be shown that the boundaries between the platelets within a bundle limit the overall transport current density in bulk material, whereas the boundaries between bundles do not further reduce its value. The results are in agreement with a TEM analysis of the grain boundaries.

引用

页码：413 / 420

页数：8

共 25 条

[1] HIGH-TEMPERATURE SUPERCONDUCTORS FROM THE GRAIN-BOUNDARY PERSPECTIVE [J].