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The superconducting properties of MgB2 synthesized by reaction of Mg and higher boride phase


Tan, Kim Lee and Tan, Kwee Yong and Chen, Soo Kien and Shaari, Abdul Halim and Lim, Kean Pah (2010) The superconducting properties of MgB2 synthesized by reaction of Mg and higher boride phase. In: Regional Annual Fundamental Science Symposium 2010 (RAFSS 2010), 8-9 June 2010, Grand Season Hotel, Kuala Lumpur. (pp. 161-167).


In this work, the synthesis of MgB2 by reaction between MgB4 and Mg has been investigated. The MgB4 powders were initially acid-washed in order to eliminate mainly as well as other impurities. Later, an appropriate amount of Mg was added for reaction at temperature range from 650°C to 950°C for 4 hours. The samples were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and SQUID magnetometer (MPMS). Results from XRD showed the dominant phase of MgB2 with some impurities of MgB4 and MgO in all samples. The scanning electron micrographs showed denser microstructures compared to samples obtained by direct in-situ reaction of Mg and B. However, the measured physical density was decreased upon increasing the sintering temperature attributed to the loss of Mg. The superconducting transition temperature, Tc at 37.2K was found to improve at lower sintering temperature.

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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Science
Publisher: Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia
Keywords: MgB4; MgB2; Porosity; Phase formation; Superconducting properties; Density; Microstructures
Depositing User: Nabilah Mustapa
Date Deposited: 03 Sep 2018 04:16
Last Modified: 03 Sep 2018 04:16
URI: http://psasir.upm.edu.my/id/eprint/64970
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