Synthesis and characterisation of nanoscale magnesium oxide powders and their application in thick films of Bi2Sr2CaCu2O8

被引：114

作者：

Bhargava, A ^{[1
]}

Alarco, JA ^{[1
]}

Mackinnon, IDR ^{[1
]}

Page, D ^{[1
]}

Ilyushechkin, A ^{[1
]}

机构：

[1] Univ Queensland, UniQuest Ltd ACD, St Lucia, Qld 4072, Australia

来源：

MATERIALS LETTERS | 1998年 / 34卷 / 3-6期

关键词：

synthesis; nanoscale; magnesium oxide; magnesite; high temperature superconductors; Bi2Sr2CaCu2O8; critical current;

D O I：

10.1016/S0167-577X(97)00148-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoscale MgO powder was synthesized from magnesite ore by a wet chemical method. Acid dissolution was used to obtain a solution from which magnesium containing complexes were precipitated by either oxalic acid or ammonium hydroxide, The transformation of precipitates to the oxide was monitored by thermal analysis and XRD and the transformed powders were studied by electron microscopy. The MgO powders were added as dopants to Bi2SrCa2CuO8 powders and high temperature superconductor thick films were deposited on silver. Addition of suitable MgO powder resulted in increase of critical current density, J(c), from 8900 A cm(-2) to 13 900 A cm(-2) measured at 77 K and 0 T. The effect of MgO addition was evaluated by XRD, electron microscopy and critical current density measurements. (C) 1998 Elsevier Science B.V.

引用

页码：133 / 142

页数：10

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