بررسی خواص مغناطیسی ابررسانای سرامیکی Yba2Cu3O7-x/Ag

بررسی خواص ساختاری و مغناطیسی الیاف ابررسانای YBa2Cu3O7- ساخته شده به‌روش الکتروریسندگی

Electrospinning is one of the most feasible techniques for producing nanoceramic fibers. In this paper, YBa2Cu3O7-δ (YBCO) superconductor nanofibers synthesized using electrospinning. The first step was preparation of a composite that is formed by mixing yttrium, barium, and copper acetates with different percent of polyvinyl alcohol (PVA). Then, the composite polymer has been electrospun to pr...

اثرآلایش نقره بر خواص ابررسانای سرامیکی B‏i1/6Pb0/4Sr2Ca2Cu3Oδ

In this research, the effect of silver doping on 2223 phase of ceramic superconductor Bi1.6Pb0.4Sr2Ca2Cu3Oδ (BSCCO) has been investigated. To synthesis the samples, we used solid-state reaction method and two different doping methods, namely, doping samples during making processes (batches No.1) and doping samples after making superconductor (batch No.2). With doping Ag to BSCCO, the criti...

خواص مغناطیسی و ساختار ابررسانای (BI2223) آلاییده به سرب آنتیموان

  In a systematic approach, we have investigated the effect of the presence of Pb and Sb in the Bi site in a BSCCO (2223 phase) superconductor. There are some contradictory reports in substitution of Sb in the Bi site. Some researchers report an increase in the Tc of these materials. So, we have made an accurate stoichiometry of these superconductors and selected extra pure starting materials w...

ساختار و خواص ابررسانای YBa2Cu3O7-δ آلاییده با کادمیوم اکسید توده

In this paper, the Y1-xCdxBa2Cu3O7-δ superconductor with x=0, 0.05, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5 are prepared using the solid state method and the structure, electrical resistance, critical current density and critical temperature of it, have been studied. The results show that these doping do not affect so much on the structure and lattice parameters. The electrical resistance of samples incr...

خواص مغناطیسی و ساختاری ابررسانای 2223- Bi آلاییده با کادمیوم

In this paper, Bi1.64-xPb0.36CdxSr2Ca2Cu3Oy (BPCSCCO) superconductor with x = 0.0, 0.02, 0.04 and 0.06 is made by the solid state reaction method. The magnetic susceptibility measurements were performed using AC susceptometer. The microstructure and morphology of the samples have been studied by X-ray diffraction, scanning electron microscope and energy dispersive X-ray. The results show that t...

بررسی تاثیر سرب و زمان پخت برروی خواص ابررسانای سرامیکی Bi-Sr-Ca-Cu-O