Effects of Ball Milling on the Sintering Process and Superconducting Properties of (MgB2)0.96Ni0.04 Bulks

被引：1

作者：

Cai, Qi ^{[1
]}

Ma, Zongqing ^{[1
]}

Liu, Yongchang ^{[1
]}

Zhao, Qian ^{[1
]}

Gao, Zhiming ^{[1
]}

机构：

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

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2012年 / 22卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Ball milling; MgB2; superconductor; Ni-doping; stable magnetic property; CRITICAL-CURRENT DENSITY; MGB2;

D O I：

10.1109/TASC.2012.2190600

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：

Samples of (MgB2)(0.96) Ni-0.04 prepared by mechanical alloying were sintered at 750 degrees C for 30 min. The reactive process and generating temperature of the second phase were investigated by employing differential thermal analysis, X-ray diffraction, and scanning electronic microscopy. Corresponding microstructures and superconducting properties have also been analyzed. It is found that two-step milling is effective in refining the structure and in eliminating flux jumps, although the corresponding J(c) is slightly lowered due to the existence of excessive MgO. This observation indicates that the bulk samples prepared by two-step milling possess stable properties of magnetism and heat compared with the sample prepared by manual milling.

引用

页数：5

共 26 条

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