Investigation of the effect of varied graphene oxide additions on Bi2223 superconductor properties

The impact of graphene oxide (GO) on the performance of high-temperature superconductors, specifically Bi2223, was examined in this study. Bi2223 samples were produced using a solid-state reaction method with different concentrations of GO. The use of GO, a two-dimensional oxide, resulted in it being a highly effective additive for Bi-based superconductors. Polyvinyl alcohol (PVA) was used to disperse the additive and as a pressing aid. The resulting samples underwent comprehensive characterization using various techniques. The results indicated that adding GO enhanced the superconducting properties of Bi2223, including increases in critical temperature, critical current density, and irreversibility field. Additionally, scanning electron microscopy images demonstrated that GO contributed to improved uniformity of the Bi2223 particles. The study incorporated varying weight percentages of GO (0.1, 0.5, 1, 1.1, and 1.5 wt%) into the Bi2223 precursor powder, with the optimal GO doping level identified as 1 wt%. Overall, this research suggests that GO can be a promising candidate to improve the performance of high-temperature superconductors, particularly Bi2223.