NOVEL APPROACHES IN THE MELT-TEXTURING OF YBA2CU3O7-Y

被引：2

作者：

KUMAR, RV ^{[1
]}

FRAY, DJ ^{[1
]}

WILLIAMS, HW ^{[1
]}

MISSON, A ^{[1
]}

EVETTS, JE ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT MAT SCI & MET,CAMBRIDGE,ENGLAND

来源：

JOURNAL OF MATERIALS SCIENCE | 1994年 / 29卷 / 06期

关键词：

D O I：

10.1007/BF00368920

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrochemically pre-textured samples have been subjected to melt-processing in order to produce dense and highly textured bulk samples of YBa2Cu3O7-y, (YBCO). Full oxygenation of these samples has been achieved at high processing temperatures of 720 degrees C by electrochemical titration, in order to increase the superconducting transition temperature to > 89 K. These samples show a large magnetic hysteresis, and the value of J(c) calculated using the,Bean model is in the range 4000-6000 A cm(-2) at 77 K and 1 tesla magnetic field, and is independent of the applied field in that range. In another variation of the melt-processing technique - referred to as ''isothermal melt-textured growth'' - highly textured samples have been produced by the movement of the solidification front at a constant temperature in an oxygen activity gradient.

引用

页码：1527 / 1532

页数：6

共 14 条

[1] CRITICAL-CURRENT MEASUREMENTS IN EPITAXIAL-FILMS OF YBA2CU3O7-X COMPOUND [J].