Optimization of the texture formation and characterization of large size top-seeded-melt-grown YBCO pellets

被引：43

作者：

Leblond, C ^{[1
]}

Monot, I ^{[1
]}

Provost, J ^{[1
]}

Desgardin, G ^{[1
]}

机构：

[1] Inst Sci Mat & Rayonnement, UMR CNRS 6508, Lab CRISMAT, F-14050 Caen, France

来源：

PHYSICA C | 1999年 / 311卷 / 3-4期

关键词：

Ce doping; YBaCuO; top seeding; texture;

D O I：

10.1016/S0921-4534(98)00627-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The thermal texture cycle for the top seeding of Ce doped YBCO pellets has been studied and optimised. Several quenches have proved the importance of a presintering step to have a homogeneous distribution of the Y2BaCuO5 particles in the melt. The temperature window, in which a heterogeneous nucleated grain can grow, without being hindered by homogeneous nucleated grains, has been determined. By adjusting the process rate to the crystal growth rate in this window, large well textured single domains of YBa2Cu3O7-delta have been obtained, with a high degree of reproducibility. Microstructure and texture homogeneity, as well as superconducting properties have been investigated as a function of the position in the bulk pellet. The results have shown the high quality of the textured sample, and its high homogeneity. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：211 / 222

页数：12

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