Faiza, BouaïchaMosbah, Mohamed-FayçalÖzyüzer, Lütfi2023-11-112023-11-1120230031-918X0015-3230https://doi.org/10.1134/S0031918X22601032https://hdl.handle.net/11147/14029Abstract: We study here, the effect of high content of sodium doping on structural and electrical properties of Bi(Pb)2212 superconductors. The X-ray analysis results showed that all the prepared samples mainly belong to the superconducting tetragonal phase Bi–(Pb)2212. SEM micrographs show that the grains are closely related and have a characteristic flat shape for the superconductor Bi (Pb) 2212. For the undoped sample, the grains are randomly distributed with an average size of 5 μm. For doped samples, the morphology changes with sodium concentration. Resistivity measurements show that all samples have a superconducting character. © 2023, Pleiades Publishing, Ltd.eninfo:eu-repo/semantics/closedAccessBi–Pb–Sr–Ca–Cu–O systemNormal stateResistivitySHTCSubstitutionSuperconductivityArticle2-s2.0-8517509050310.1134/S0031918X22601032