Solid State Science and Technology, Vol. 17, No 2 (2009) 16-23

ISSN 0128-7389

Corresponding Author: nasri@uniten.edu.my

16

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

 

ABSTRACT

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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