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Superconductor YBa 2-x Ag x Cu 3 O 7- δ in a bulk form has been developed through modified sol-gel processing. The preparation involved dissolving metal organic precursor in a mixture of propanoic acid and propylamine which then undergo for annealing at 900 °C for 5 hours and sintering at 950 °C for 5 hours. The bulk samples were characterized using X-ray diffractogram (XRD), resistivity measurement technique and Scanning Electron Microscope (SEM). The highest T C value was found at 84 K for x=0.05. The value decrease as the Ag concentration increase. The highest J C value measured for x =0.05 were 5.977 A/cm 2 at 50 K and 4.748 A/cm 2 a 60 K. 123 phase remains as orthorhombic for all samples. SEM micrograph showed the clear grains for the pure samples and it became not visible as the Ag concentration increase.

Microstructure and superconducting properties of Ag-substituted YBa2-xAgxCu3O7- δ ceramics prepared by sol-gel method