The Influence of Milling Time and ZrB2 Addition on the Superconducting Properties of MgB2

被引：8
|
作者：
Da Silva, Lucas B. S. [1 ]
Hellstrom, Eric E. [2 ]
Rodrigues, Durval, Jr. [1 ]
机构：
[1] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP, Brazil
[2] Florida State Univ, Ctr Appl Superconduct, Tallahassee, FL 32306 USA
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2015年 / 25卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
Characterization; MgB2; superconductor; milling time; ZrB2; addition; CRITICAL-CURRENT DENSITIES; UPPER CRITICAL-FIELD; CARBON; TAPES; ENHANCEMENT; GRAPHITE;
D O I：
10.1109/TASC.2014.2364779
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
High-energy ball milling is generally used in granular materials to increase grain connectivity and densification. In this study, different high-energy ball milling times were investigated to optimize the MgB2 superconducting properties in samples with added ZrB2. The objectives of this addition were to modify the Mg planes and to create crystalline defects in the superconducting matrix that can act as pinning centers. We observed the behavior of the dopant on the superconducting properties, and found the optimal ball milling time of 300 min improved J(c) in high magnetic field and H-irr from 7.2 to 10.0 T at 4.2 K.
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页数：4
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