Effect Of The Zr4+Ã¯ÂÂ­Oxide Additives On Raman Spectra And Superconducting Properties Of 2212-BPSCCO
The undoped BPSCCO(Bi/Pb)2Sr2Ca1Cu2O8 and the family of the general formula (Bi1+xZrxPb)2Sr2Ca2Cu3O, ( where 0.1iÂ£iÂ´iÂ£ 0.3) were prepared by both route the high temperature solid state reaction and freez dry ( solution) routes at sintering temperature 8650C under O2 stream .The superconducting measurements proved that, best Tc=74.33 K is for undoped PBSCCO, while the lowest Tc= 65.5 K is for the doped sample with x= 0.3 mole% indicating that superconductive transition temperatures Tcs decrease regulary with increasing Zr4+-dopant concentration from x=0.1 to 0.3 respectively. Also SEM analysis for micro-morphological properties was performed as preliminary tool for proving molar ratios and nature of micromorphological stucture of the prepared samples. ZrO2 additives exhibit strong interactions on different Raman spectral modes of 2212-superconducting phase.