Solid State Science and Technology, Vol. 19, No 1 (2011) 69-77
MECHANICAL BEHAVIOR AND SUPERCONDUCTING PROPERTIES OF
NANOSIZE MgO ADDED DIP-COATED Bi2Sr2CaCu2O8
N.A. Hamid*, N.F. Shamsudin, K.M. Chin and F. Tarlochan
College of Engineering, Universiti Tenaga Nasional
43009 Kajang, Selangor, Malaysia
*Corresponding Author: email@example.com
In this study, 3 to 8 weight percent of nanosize MgO particles was added to
Bi2Sr2CaCu2O8 (Bi-2212) high-temperature superconductor to fabricate Bi-2212
superconductor elements with superior mechanical properties. The mechanical
strength of the samples was studied by conducting the compression test at room
temperature, and the addition of 5% nanosize MgO particles produced the highest
strength when compared with other samples. The sample with 5wt% MgO addition
also exhibited superior superconducting properties. The Bi-2212 powder with 5%
nanosize MgO addition was used to fabricate Bi-2212 tapes through the dip-coatingthen-
stacking method. The fully processed tapes were investigated via dc electrical
resistance measurements, XRD patterns, SEM micrographs, transport critical current
density and tensile tests. The tensile tests were conducted at room and 77 K. Results of
tensile tests and Young’s modulus for the tapes showed that the Bi-2212 tapes with
nanosize MgO addition recorded better mechanical property when compared to the
non-added samples both at room and77 K. The double-core tape with 5% MgO
addition recorded the highest failure point at 160 MPa. Beside the strengthening effect
that was observed in the nanosize MgO added Bi-2212 superconductor tapes, superior
superconducting properties were also observed in the tapes.
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