Spray dried Pt-doped Nd-Ba-Cu-O precursor powder for seeded peritectic processing of large superconducting grains

被引：11

作者：

Lo, W ^{[1
]}

Cardwell, DA ^{[1
]}

Shi, YH ^{[1
]}

机构：

[1] Univ Cambridge, Irc Superconduct, Cambridge CB3 0HE, England

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1999年 / 65卷 / 01期

关键词：

crystal matrix; interface; pseudo-crystals;

D O I：

10.1016/S0921-5107(99)00190-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Large grain Nd-Ba-Cu-O has significant potential for application in bulk superconducting 'permanent magnet' engineering devices. This study describes the preparation of Nd-Ba-Cu-O precursor powder by spray drying and subsequent calcination for the growth of large grains using a seeded peritectic solidification technique. Precursor powder prepared by this method has been used to fabricate large Nd-Ba-Cu-O grains which exhibit good growth morphologies. Surface roughening associated with a continuous phase transformation that occurs in the precursor bodies prior to and during melt processing has been identified as a source of inhomogeneity in the grain growth morphology. This may be avoided by calcining the precursor powders at high temperature for a short period of time to yield only the desired crystalline and structural phases. (C) 1999 Published by Elsevier Science S.A. All rights reserved.

引用

页码：1 / 10

页数：10

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