Influences of K Substitution on Bi (Pb)-2223 Superconductors
Muna Moussa Abbas1, Huda Deia Dehi2
1Muna Moussa Abbass, Physics Department, University of Baghdad, Iraq.
2Huda Deia Dehi, Physics Department, University of Baghdad, Iraq.
Manuscript received on November 28, 2014. | Revised Manuscript received on December 11, 2014. | Manuscript published on December 30, 2014. | PP: 177-179 | Volume-4 Issue-2, December 2014. | Retrieval Number:  B3655124214/2013©BEIESP

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Abstract: Solid state thermodynamically reaction method were used to prepare a high temperature superconductor (HTSC) with a nominal composition Bi2-xKxPb0.3Sr2Ca2Cu3O10+δ with x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5. The phase identification /gross structural characteristics of synthesized HTSC compounds explored through X-ray diffractions. The results reveal that all samples are polycrystalline and both (Bi, Pb)-2223 and -2212 phases coexist in the samples having orthorhombic crystal structure. The volume fraction was estimated from the intensities of Bi-(2223) and Bi-(2212) phases. The lattice constants of samples were determined from the XRD analysis by indexing the peaks observed for (Bi, Pb)-2223 phase. The electrical resistivity results showed a significant influence of the K substitution on Bi (Pb)-2223 superconductors and the highest TC at 128K with x=0.5.
Keywords: Bi-based superconductors, K substitution, Phase formation, Solid state reaction.