The improved superconductive properties of MgB2 bulks with minor Cu addition through reducing the MgO impurity

被引：25

作者：

Ma, Zongqing ^{[1
]}

Liu, Yongchang ^{[1
]}

Shi, Qingzhi ^{[1
]}

Zhao, Qian ^{[1
]}

Gao, Zhiming ^{[1
]}

机构：

[1] Tianjin Univ, Coll Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Tianjin 300072, Peoples R China

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2008年 / 468卷 / 22期

基金：

中国国家自然科学基金;

关键词：

MgB2; DSC; Mgo; Cu addition;

D O I：

10.1016/j.physc.2008.07.003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The minor Cu (<3 at%) addition could significantly reduce the amount of MgO impurity in the in situ sintered MgB2 samples and thus improve the critical current density (J(c)) at low field and the critical transition temperature (T-c). The formation of local Mg-Cu liquid at about 485 degrees C could wrap the neighboring Mg particles and thus protect them from the oxidation during the sintering process. Our results provide a possible route to further improve the superconductive properties of pure or doped MgB2 samples through decreasing the amount of MgO impurity with minor Cu addition. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2250 / 2253

页数：4

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