Abstract
In this study is presented the partial replacement of copper with nickel TlBa2Ca2 Cu3xNix O9-δ superconductor with (x=0,0.2,0.4,0.6,0.8,1.0). The samples were prepared in a solid state reaction method with a 850 Co sintering temperature for 24 hours. Structural of the samples were studied by using X-ray powder. The XRD analysis showed that a tetragonal diagram and polycrystalline structures with a majority phase 1223 and changes in nickel concentrations resulted in a change in the parameters of lattice parameters a, b, c axis c / a, mass density and Volume fraction. Four prop technique were used to test the electrical resistivity to determine the critical temperature at zero resistance Tc(offset). The best transfer temperature was obtained from the TlBa2Ca2Cu2.4Ni0.6O9-δ sample, which is equal to 134.6 Kelvin.
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