Influences of heat treatment and doping on microstructure and superconducting properties of MgB2 superconductor

被引：2
作者：
Yan, G.
Feng, Y.
Lu, Y. F.
Zhou, L.
Jing, W. X.
Wen, H. H.
机构：
[1] NW Inst Nonferrous Met Res, Xian 710016, Peoples R China
[2] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
[3] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2006年 / 445卷
基金：
中国国家自然科学基金;
关键词：
MgB2; heat treatment; doping; microstructure; critical current;
D O I：
10.1016/j.physc.2006.04.038
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The microstructure and superconducting properties of pure, Ti and Zr doped MgB2, which synthesized by solid reaction method. The heat treatment temperature are varied from 650 to 800 degrees C at ambient pressure. It is found that heat treatment temperature have obvious effect on grain size and MgB2 grains are greatly refined at 750 degrees C. Besides, Zr does not occupy the atomic site in the MgB2 crystal structure, but forms ZrB2 particles in the MgB2 matrix. The results of superconducting properties show that Mg0.9Zr0.1B2 have the highest J(c) value sintered at 800 degrees C. It is argued that the microstructure features with good grain connectivity of the Zr doped MgB2 fabricated at optimize heat treatment temperature may take the responsibility for the enhancement of J(c) in Zr-doped MgB2 bulk superconductor. The results show a good potential to fabricate high performance MgB2 bulks and wires at ambient pressure on an industrial scale. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：466 / 470
页数：5
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