Solid State Science and Technology, Vol. 15, No 1 (2007) 43-48


ISSN 0128-7389

Corresponding Author:




M. I. Yusofa, R. Omara A. K. Yahyaa and  Z. Awangb


aFaculty of Applied Sciences, Universiti Teknologi MARA,40450 Shah Alam, Selangor

bMicrowave Center, Faculty of Electrical Eng, Universiti Teknologi MARA, 40450 Shah Alam, Selangor.



Superconducting powder from high purity chemicals with nominal composition of Tl0.9Bi0.1Sr1.9In0.1Ca0.9Y0.1Cu2O7   were  used  to  fabricate  Tl-1212/Ag  superconducting tapes using the dip-coating (DC) method. The tapes were subjected to reannealing under different heating conditions where some of the tapes were subjected to intermediate mechanical rolling. Results showed that annealing temperature and annealing duration together with intermediate mechanical rolling (IR) could be optimized to increase Tc and 1212 phase formation and Jc of In-substituted Tl-1212/Ag tapes. The highest Jc was observed for the tape, which was reannealed at 910 °C for a total duration of 60 minutes and   subjected   to   IR.  The   increased   Jc    could   be due   to   the  densification   ofsuperconducting core and increase in 1212 phase after thermomechanical treatment.



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