نانو فیلامانها(cnt & cnf) و ترکیب ابررسانای ۱۲۳

نانو فیلامانها(CNT & CNF) و ترکیب ابررسانای 123

  The effects of carbon nano filaments on the superconducting properties of Y-123 compound were studied. Samples were synthesized using standard solid-state reaction technique by adding CNT up to 1 wt %. The XRD data confirm the single phase orthorhombic structure for all the samples. The SEM of samples shows existence of CNTs which can powered the weak links that increase the . We obtained cha...

مدهای فونونی در ترکیب ابررسانای Gd1-xCexBa2Cu3O7-δ

 XRD and Raman analyses were performed to probe the phase formation and the variation of the normal phonon frequencies of the high temperature superconductor GdBa2Cu3O7-δ upon Ce doping. It was found that in addition to the orthorhombic 123 phase, some nonsuperconducting peaks, which are mainly due to the BaCeO3 secondary phase, are also formed that suppress the superconducting transition tempe...

CNF Application in Discrete

تأثیر نانوذرات PbO بر خواص ساختاری و ریزساختاری ترکیب ابررسانای Bi2-xPbxSr2Ca2Cu4Oy

In this paper, β-PbO nanoparticles were prepared by microwave irradiation. Then, the PbO nanoparticles with size of 32 nm were doped in the Bi2-xPbxSr2Ca2Cu4Oy superconductor with x = 0.0, 0.2, 0.4 and 0.6. The samples were synthesized by the standard solid state reaction method. The structural properties, microstructure and morphology of the samples have been studied by XRD and SEM. After synt...

اثر آلایش Ni و Fe در ترکیب ابررسانای YBCO ساخته شده به روش سل ـ ژل

 We fabricated YBa2Cu3-xMxO7- d (M=Ni, Fe) bulk samples, with stochiometric amount 0≤x≤0.045 by sol-gel method. The phase analysis and microstructure of specimens were examined by XRD and SEM. The electrical resistivity was measured using standard four probe technique for 77-300K. Investigation of XRD spectrum by MAUD shows Ni and Fe ions substitute in Cu(2) and Cu(1) site, respectively. Transi...

Microfluidic Mixing CNF Project

Microfluidic systems present advantages and challenges relative to larger systems for performing chemical processes. They facilitate manipulation and analysis of small sample volumes and process parallelization within a small footprint. However, they generally suffer from inefficient mixing and low rates of interfacial mass transfer, due to the laminar flow and the long diffusive mixing times c...