Synthesis and Characterization of Low Density Bi-2223 Superconductors via Co-Precipitation Method

High temperature Bi1.6Pb0.4Sr2Ca2Cu3Oδ of low density has been synthesized via co-precipitation method and its electrical and structural properties have been studied. The optimum porosity of the samples was obtained using variety amount of sucrose C12H22O11 which is used as supplementary filler. The electrical properties of superconductor such as critical temperature, Tc and critical current density, Jc were determined using the four-probe method. X-ray diffraction (XRD) was used to analyze the structural properties of the samples. The density of samples was measured using densitometer. The obtained results have revealed a significant influence of the pore presence in superconducting samples on the electrical properties. The Tc for low density Bi-2223 with 0.1g sugar sucrose is much higher compared to 0.05g, 0.15g and standard sample which is Tc zero is 98 K. The Jc for low density Bi-2223 with 0.1g sugar sucrose is 6 A/cm2 at 60 K which is higher than high density samples. The crystallographic structure remains in the tetragonal form where a=b≠c for all samples.