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

ISSN 0128-7389

Corresponding Author:




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.



[1]. G. Kordas, (2000). Sol-gel preparation of MgO fibers, J. Mater. Chem. 10,


[2]. Y.J. Chen, J.B. Li, Y.S. Han, X.Z. Yang and J.H. Dai (2003). Fabrication of

decorated MgO crystalline fibers, Mat. Res. Bulletin 38, 445-452.

[3]. M. Chen, D.M. Glowacka, B. Soylu, B., D.R. Watson, J.K.S Christiansen, R.P.

Baranowski, B.A. Glowacki and J.E. Evetts (1995). Texture and critical current

anisotropy in composite reaction textured MgO whisker/Bi-2212 multilayer

structures, IEEE Trans. Appl. Supercond. 5, 1467-1470.

[4]. M.J. Naylor and C.R.M. Grovenor (1999). Melt processing of Bi-2212 on MgO

buffered substrates, IEEE Trans. Appl. Supercond. 9, 1860-1863.

[5]. D.F. Watson, M. Chen and J.E. Evetts (1995). The fabrication of composite

reaction textured Bi2Sr2CaCu2O8+y superconductors, Supercond. Sci. Technol. 8:

311-[6]. H. Suhara, T. Nabatame, O.-B. Hyun, S. Koike, and I. Hirabayashi (1995).

Grain boundary properties of TlBa2Ca2Cu3Ox and Tl2Ba2CaCu2Ox thin films.

Supercond. Sci. Technol. 8, 443-447.

[7]. D.J. Miller, T.G. Holesinger, J.D. Hettinger, K.C. Goretta and K.E. Gray (1993).

Enhanced superconducting properties in Bi2Sr2CaCu2Oy by thermal and

mechanical processing, IEEE Trans. Appl. Supercond. 3, 1182-1185.

[8]. H. Sitepua, H.J. Praska and M.D. Vaudinb (2001). Texture characterization in xray

and neutron powder diffraction data using the generalized sphericalharmonic,

Advances in X-ray Analysis 44, 241-246.

[9]. L. Chen, L. Wang, Z. Zeng and T. Xu (2006). Influence of pulse frequency on

the microstructure and wear resistance of electrodeposited Ni-Al2O3 composite

coatings, Surf. Coat. Technol. 201, 599-605.

[10]. H. Tamura, T. Mito, A. Iwamoto, Y. Yamada and K. Tachikawa (2002).

Mechanical properties and reinforcement of Bi-2212 tubular bulk

superconductor for current lead, IEEE Trans. Appl. Supercond. 12(1), 1319-


[11]. A. Miyase, A., Y.S. Yuan, M.S. Wong, J. Schön and S.S. Wang (1995).

Cyrogenic and room temperature mechanical behavior of an Al2O3 fibre

reinforced high-temperature superconducting (Bi,Pb)2Sr2Ca2Cu3Ox ceramic

matrix composite, Supercond. Sci. Technol. 8, 626-637

[12]. Y.S. Yuan, M.S. Wong and S.S. Wang (1996). Mechanical behavior of MgOwhisker

reinforced (Bi,Pb)2Sr2Ca2Cu3Oy high-temperature superconducting

composite, J. Mater. Res. 11(7), 1645-1652316.