Properties of Ag Doped Bi-Superconductors Prepared by Solid State and Sol-Gel Methods

Dagmar Sýkorová; Olga Smrčková; Petr Vašek

doi:10.4028/www.scientific.net/AST.47.104

Paper Titles

Mechanical Properties and Fractographical Analysis by Laser Scanning Confocal Microscopy (LSCM) of Laser Textured Bi(Pb)-2212 Superconducting Materials
p.82

Application of Laser Technique on the Formation of Superconductive Layer on the Bulk of Press Formed Bi System - Evaluation of Mechanical Properties of the Treated Bulk
p.88

Basic Characteristics of the Single Layer Type Microwave Absorber in X Band Using Superconductor Powder
p.93

Fluctuating Diamagnetism in the Critical Region of the Superconducting Transition in Lead Nanoparticles
p.98

Properties of Ag Doped Bi-Superconductors Prepared by Solid State and Sol-Gel Methods
p.104

Effect of Co Doping on the Superconducting Properties of Overdoped (Lu_0.8Ca_0.2)Ba₂Cu₃O_z
p.108

Scaling of Resistivities in MgB₂
p.113

Transport Properties over Critical Currents for Ag-Sheathed Bi₂Sr₂CaCu₂O₈ Superconductors with Different E-J Dependence
p.118

Progress of YBCO Coated Conductor in JAPN and Recent Advance of PLD and IBAD Method
p.124

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 47Properties of Ag Doped Bi-Superconductors Prepared...

Properties of Ag Doped Bi-Superconductors Prepared by Solid State and Sol-Gel Methods

Abstract:

Superconductive ceramics with nominal composition Bi3.2Pb0.8Sr4Ca5Cu7Ox were prepared by solid state synthesis with 10 wt% of nanopowdered silver and were compared with those prepared by sol-gel method. The "in situ" polymerization route with citric acid and ethylene glycol was used to enhance homogeneity of the reaction mixture. The quality of samples was characterized by X-ray analysis, scanning electronic microscopy and the measurement of porosity. The superconducting properties were investigated by the measurement of the temperature dependence of magnetic susceptibility and by current voltage characteristic. All samples have critical temperatures in the range from 109 to112 K. Addition of silver always increases the volume of Bi-2223 phase and critical current density of the samples. Sol-gel samples reveal lower porosity, higher bulk density and better connectivity of the grains, resulting in the further enhancement of critical current density.