Borax addition in the MgB₂ bulk system

Authors

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