Solid State Science and Technology, Vol. 19, No 1 (2011) 69-77

ISSN 0128-7389

69

 

MECHANICAL BEHAVIOR AND SUPERCONDUCTING PROPERTIES OF

NANOSIZE MgO ADDED DIP-COATED Bi2Sr2CaCu2O8

SUPERCONDUCTING TAPE

 

N.A. Hamid*, N.F. Shamsudin, K.M. Chin and F. Tarlochan

College of Engineering, Universiti Tenaga Nasional

43009 Kajang, Selangor, Malaysia

*Corresponding Author: nasri@uniten.edu.my

 

ABSTRACT

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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