Cover Image

Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg

Instead of reacting B and Mg powders, MgB4 was used as precursor to react with Mg to obtain the polycrystalline samples of nominal composition MgxB2 (x = 1.2, 1.5, and 1.7). Upon increasing the sintering temperature to 750 °C, the reaction between MgB4 and Mg was thermodynamically intensified leadin...

Full description

Saved in:
Bibliographic Details
Main Authors: Tan, K. L., Lim, Kean Pah, Shaari, Abdul Halim, Chen, Soo Kien
Format: Article
Language:English
English
Published: Wiley-VCH Verlag 2013
Online Access:http://psasir.upm.edu.my/id/eprint/30205/1/Enhanced%20critical%20current%20density%20in%20MgB2%20prepared%20by%20reaction%20of%20MgB4%20and%20Mg.pdf
http://psasir.upm.edu.my/id/eprint/30205/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.30205
record_format eprints
spelling my.upm.eprints.302052015-12-29T02:50:08Z http://psasir.upm.edu.my/id/eprint/30205/ Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg Tan, K. L. Lim, Kean Pah Shaari, Abdul Halim Chen, Soo Kien Instead of reacting B and Mg powders, MgB4 was used as precursor to react with Mg to obtain the polycrystalline samples of nominal composition MgxB2 (x = 1.2, 1.5, and 1.7). Upon increasing the sintering temperature to 750 °C, the reaction between MgB4 and Mg was thermodynamically intensified leading to the formation of larger MgB2 weight fraction as estimated from X-ray diffraction (XRD) data using the Rietveld method. Despite no further improvement to the weight fraction of this phase by increasing the excess nominal Mg, it was shown that the critical current density (Jc) was enhanced by almost one order of magnitude. At 5 K, 2 T, Jc for the sample Mg1.5B2 is estimated to be 4.5 × 105 A cm−2. The enhancement of Jc is attributed to the collective effect of improved grain connectivity and flux pinning by unreacted Mg. Incorporation of nano-SiC for reaction resulted in a more gradual drop of Jc with applied magnetic field. Hence, Jc can be tailored to meet the range of fields intended for various applications via optimization of excess nominal Mg and dopant additions. Wiley-VCH Verlag 2013-03 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30205/1/Enhanced%20critical%20current%20density%20in%20MgB2%20prepared%20by%20reaction%20of%20MgB4%20and%20Mg.pdf Tan, K. L. and Lim, Kean Pah and Shaari, Abdul Halim and Chen, Soo Kien (2013) Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg. Physica Status Solidi (A) Applications and Materials Science, 20 (3). pp. 616-622. ISSN 1862-6300; ESSN: 1862-6319 10.1002/pssa.201228752 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Instead of reacting B and Mg powders, MgB4 was used as precursor to react with Mg to obtain the polycrystalline samples of nominal composition MgxB2 (x = 1.2, 1.5, and 1.7). Upon increasing the sintering temperature to 750 °C, the reaction between MgB4 and Mg was thermodynamically intensified leading to the formation of larger MgB2 weight fraction as estimated from X-ray diffraction (XRD) data using the Rietveld method. Despite no further improvement to the weight fraction of this phase by increasing the excess nominal Mg, it was shown that the critical current density (Jc) was enhanced by almost one order of magnitude. At 5 K, 2 T, Jc for the sample Mg1.5B2 is estimated to be 4.5 × 105 A cm−2. The enhancement of Jc is attributed to the collective effect of improved grain connectivity and flux pinning by unreacted Mg. Incorporation of nano-SiC for reaction resulted in a more gradual drop of Jc with applied magnetic field. Hence, Jc can be tailored to meet the range of fields intended for various applications via optimization of excess nominal Mg and dopant additions.
format Article
author Tan, K. L.
Lim, Kean Pah
Shaari, Abdul Halim
Chen, Soo Kien
spellingShingle Tan, K. L.
Lim, Kean Pah
Shaari, Abdul Halim
Chen, Soo Kien
Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg
author_facet Tan, K. L.
Lim, Kean Pah
Shaari, Abdul Halim
Chen, Soo Kien
author_sort Tan, K. L.
title Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg
title_short Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg
title_full Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg
title_fullStr Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg
title_full_unstemmed Enhanced critical current density in MgB2 prepared by reaction of MgB4 and Mg
title_sort enhanced critical current density in mgb2 prepared by reaction of mgb4 and mg
publisher Wiley-VCH Verlag
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/30205/1/Enhanced%20critical%20current%20density%20in%20MgB2%20prepared%20by%20reaction%20of%20MgB4%20and%20Mg.pdf
http://psasir.upm.edu.my/id/eprint/30205/
_version_ 1643829988782243840
score 13.211869

Similar Items