Improved superconducting properties in bulk MgB2 prepared by high-energy milling of Mg and B powders
Creators
- 1. Northwest Institute for Nonferrous Metal Research, PO Box 51, Xian, Shaanxi 710016 (China)
- 2. Northwestern Polytechnical University, Xi'an 710012 (China)
- 3. School of Material Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450002 (China)
Description
MgB2 bulks were prepared by high-energy milling of Mg and B powders. The correlations between milling times, microstructure and superconducting properties were investigated in MgB2 bulks. The samples were characterized by x-ray diffraction (XRD), energy dispersive spectrometry (EDX) and scanning electron microscopy (SEM), and the magnetization properties were examined with a superconducting quantum interference device (SQUID) magnetometer. The investigations showed that high-energy milling is an effective approach for obtaining fine crystalline (40-100 nm) bulk MgB2 with good grain connectivity and high Jc performance. The critical current density reaches 2.0 x 106 A cm-2 at 15 K and 0.59 T, 5.7 x 105 A cm-2 at 2 T and 3.0 x 104 A cm-2 at 5 T
Availability note (English)
Available online at http://stacks.iop.org/0953-2048/19/1215/sust6_11_021.pdf or at the Web site for the journal Superconductor Science and Technology (ISSN 1361-6668) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-2048/19/1215/sust6_11_021.pdf; http://www.iop.org/;
- DOI
- 10.1088/0953-2048/19/11/021;
- PII
- S0953-2048(06)28509-9;
Publishing Information
- Journal Title
- Superconductor Science and Technology
- Journal Volume
- 19
- Journal Issue
- 11
- Journal Page Range
- p. 1215-1218
- ISSN
- 0953-2048
- CODEN
- SUSTEF
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38012202
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CRITICAL CURRENT; CURRENT DENSITY; MAGNESIUM BORIDES; MAGNETIZATION; MAGNETOMETERS; MICROSTRUCTURE; PERFORMANCE; POWDERS; SCANNING ELECTRON MICROSCOPY; SPECTROSCOPY; SQUID DEVICES; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BORIDES; BORON COMPOUNDS; COHERENT SCATTERING; CURRENTS; DIFFRACTION; ELECTRIC CURRENTS; ELECTRON MICROSCOPY; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; MAGNESIUM COMPOUNDS; MEASURING INSTRUMENTS; MICROSCOPY; MICROWAVE EQUIPMENT; SCATTERING; SUPERCONDUCTING DEVICES