Borax addition in the MgB₂ bulk system

Authors

Xyrus A. Galapia National Institute of Physics, University of the Philippines Diliman
Francesca Isabel N. de Vera National Institute of Physics, University of the Philippines Diliman
Isabel Ophelia D. Fernando National Institute of Physics, University of the Philippines Diliman
Roland V. Sarmago National Institute of Physics, University of the Philippines Diliman

Abstract

MgB₂ bulk samples with different borax additions, x = 0.0, 4.42, 13.55, 23.06 wt% were fabricated using solid state sintering. XRD measurements reveal the increasing MgO presence and broadening of the (100) MgB₂ peak as the borax concentration increased. Granular morphology was observed for all samples which are characteristic to MgB₂. Based on the SEM analysis, sintering necks appear in the pristine sample which are not present in the borax-added bulks. Diamagnetic transition was detected for samples with additions up to 13.55 wt%. Susceptibility measurements reveal the transition width is not sharp for x = 13.55 wt% addition, an indication of poor grain coupling due to large impurity volume while no diamagnetic signal was observed for x = 23.06 wt% borax addition.

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Issue

2015: Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2015-PA-11

Section

Poster Session PA

Published

2015-06-03

How to Cite

[1]

XA Galapia, FIN de Vera, IOD Fernando, and RV Sarmago, Borax addition in the MgB2 bulk system, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-PA-11 (2015). URL: https://proceedings.spp-online.org/article/view/1170.