Kayed, Tarek SaidKayed, TSDepartment of Electrical & Electronics Engineering2024-07-052024-07-05200370025-540810.1016/S0025-5408(02)01053-X2-s2.0-0037456543https://doi.org/10.1016/S0025-5408(02)01053-Xhttps://hdl.handle.net/20.500.14411/1147Kayed, Tarek/0000-0003-3482-4166The effects of boron doping on the formation and properties of the Tl-based superconductors have been studied. Up to 10 wt.% boron has been added to the oxides having the nominal composition, Tl1.8Ba2Ca2.2Cu3Ox, by the usual solid-state reaction method. Boron additions in the range 0.8-1.0% increase the fraction of the Tl-2223 phase and significantly improve the critical temperature of the samples. Higher amounts of boron additions eliminate the Tl-2223 phase, reduce the fraction of Tl-2212 phase and cause separate non-superconducting phases to be formed. The formation of non-superconducting phases does not allow us to obtain pure Tl-2212 phase. (C) 2002 Elsevier Science Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccesssuperconductorsX-ray diffractioncrystal structureelectrical propertiesArticleQ2383533538WOS:000181654000018