Solid State Science and Technology, Vol. 17, No 2 (2009) 16-23
Corresponding Author: email@example.com
FABRICATION OF MgO FIBERS AND THE MECHANICAL PROPERTIES
OF MgO FIBERS ADDED Bi-2212 SUPERCONDUCTOR COMPOUNDS
N.A. Hamid, N.F. Shamsudin, K.M. Chin and K.W. See
Department of Engineering Sciences & Mathematics,
College of Engineering, Universiti Tenaga Nasional,
43009 Kajang, Selangor, Malaysia
MgO fibers have been fabricated in-house using the sol-gel route. In the process,
magnesium turnings were added with methanol to produce magnesium methoxide.
Ethylene glycol was then added to the mixture and stirred continuously to form the
desired gels. The gels were extruded and heat treated to produce the cylindrical shape
MgO fibers. Small weight percentage of 3% to 8% MgO fibers were added to
Bi2Sr2CaCu2O8 (Bi-2212) superconductor powder. The Bi-2212/MgO fibers compounds
were palletized and heat treated through partial- melt process, followed by slow
cooling. The samples were characterized by x-ray diffraction patterns (XRD), emission
scanning electron microscopy (FESEM) with energy dispersive x-ray (EDAX), and dc
electrical resistance measurements at zero magnetic fields. Compression tests were
conducted to study the mechanical behavior of the samples. From the characterization
results, additions of small amount of MgO fibers improved the texture of the Bi-
2212/MgO fibers compounds. Significantly higher stiffness, strength and toughness
were observed in the compounds with 5% MgO fibers addition.
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