نتایج جستجو برای: the high temperature superconductor BSCCO-2223
تعداد نتایج: 16414517 فیلتر نتایج به سال:
In this research, the influence of Bi nanoparticles addition on the high temperature superconductor BSCCO-2223 was studied. For this purpose, the samples were synthesized by the conventional sol-gel method. Then, the Bi nanoparticles with x= 0.00, 0.03, 0.06, 0.12wt% was added to BSCCO-2223. The structural characterization of all the samples was done by X-ray diffraction pattern (XRD). Also, th...
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...
The EDT A gel processing route has been used to produce (2223) BSCCO superconductiong oxides. Gel - processed (2223) BSCCO material was sintered in air or oxygen to produce specimens for transition temperature determination; the same specimens were characterised by high re.'ioultion transmission electron microscopy fitted with EDAX analysis to yield information about homogeneity, microst...
Abstract The (Bi,Pb) 2 Sr Ca Cu 3 O x (BSCCO-2223) samples were prepared by conventional solid-state reaction and co-precipitation methods. crystal size, cell parameter, structure identified from X-ray diffraction (XRD). peaks drawn have higher intensities the width of narrower compared to sample method. Slight difference in value lattice parameters between also noticeable. Concentration defect...
In order to study the viability of coreless AC coupled coils, a superconductor transformer based on BSCCO-2223 PIT tapes was constructed. To achieve the minimum flux leakage, a toroidal geometry was selected. Both secondary and primary coils were wound around a glass fiber reinforced epoxy torus, obtaining a solid system. The field inside the transformer, the coupling factor, and the losses in ...
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 wit...
In this paper Sb2O3 nanoparticles are synthesized by solution method. The effect of these nanoparticles on the Bi-2223 superconductor properties has been investigated. The critical temperature, critical current density and activation energy were measured by the standard four-probe method. Magnetic properties of the samples were measured by using the AC magnetic susceptibility. The microstructur...
In this research, the effect of addition of silicon carbide (SiC) nanoparticles on the improvement of the structural, superconductivity, magnetic, and flux pinning properties of high-temperature superconductor Bi1.6Pb0.4Sr2Ca2Cu3O10+θ (Bi-2223) was investigated. The Bi-2223 ceramic superconductor was prepared using the sol-gel method, and silicon carbide nanoparticles were modified by Azobisiso...
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...
in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...
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