Effect of Aluminum Oxide (Al₂O₃) Addition on the Structural and Electrical Properties of Bi-2223 High-Temperature Superconductors (Bi₂Ca₂Ba₂) ₁₋ₓAl₂O₃Cu₃O₁₀₊δ

Khalid Jamal Salih; Sabah Jalal  Fathi

doi:10.17605/cajmns.v6i4.2873

Khalid Jamal Salih Department of Physics-College of Education for Pure Sciences-University of Kirkuk-Kirkuk-Iraq.
Sabah Jalal Fathi Department of Physic-College of Education for Pure Sciences-University of Kirkuk-Kirkuk-Iraq

DOI: https://doi.org/10.17605/cajmns.v6i4.2873

Keywords: High-temperature superconductivity, Aluminum oxide (Al₂O₃), Structural Properties, Electrical Properties, X-ray Diffraction (XRD), Critical temperature (Tc)

Abstract

This research aims to study the effect of adding aluminum oxide (Al₂O₃) on the structural and electrical properties of the compound (Bi₂Ca₂Ba₂) ₁₋ₓAl₂O₃Cu₃O₁₀₊_δ. The samples were prepared using the solid-state reaction technique with varying ratios of Al₂O₃, followed by sintering and annealing processes under controlled conditions. The structure was analyzed using X-ray diffraction (XRD) to determine the phases and lattice constants, in addition to electrical resistivity measurements to determine the superconducting transition temperature (Tc). The results showed that adding Al₂O₃ affects the phase purity and improves the magnetic flux pinning centers, with a slight modification in the lattice constants, while the optimal concentrations contributed to improving the transition sharpness without a significant reduction in Tc. These results confirm the importance of precise control of the structural composition to improve the functional performance of high-temperature superconductors.

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