Bismuth based superconductors are among the materials that have been extensively appreciated in terms of their application. Since their discovery in 1986, many researches have been focused on them in order to improve their structure, superconducting properties and flux pining. The Bi based superconductors are very sensitive to the preparation conditions and the effect of synthesis process on electrical, magnetic and their superconducting properties. The samples were prepared by means of both solid state and sol-gel methods together with some appropriate modifications in the synthesis procedures with respect to their preparation conditions. Among these modifications, the samples of pellets were made by Spark Plasma Sintering () technique to reduce the calcination and sintering time of the samples. The stoichiometric formula Bi 1.84 Pb 0.34 Sr 1.91 Ca 2.03 Cu 3.06 O 10+X was used for sample preparation. In both of the preparation routes, two different methods of Cold Press (CP) and were used to compress the samples after the completion of their calcination and grinding. The prepared sol-gel and solid-state samples in cold press were labeled as SG-CP and SO-CP respectively, and also the samples obtained by process were labeled as SG- and SO- respectively. In the next step, the samples put through the thermal process of sintering with different temperatures with respect to their preparation process. The sol-gel samples were sintered at three temperatures of 825, 830 and 835 o C and the solid-state samples at 830, 835 and 845 o C for 40 hours. In order to study the phase formation of samples, the X-ray diffraction, magnetic susceptibility, electrical resistivity, SEM micrography and critical current density measurements. The results of these measurements indicate better superconducting properties in CP samples wilt respect to the samples prepared by method. Also by comparing best samples obtained from sol-gel method with the ones from solid-state, it is evident that the sol-gel samples which have been obtained from either or CP processes, have better superconducting properties. The comparison of the critical current densities of sol-gel and the solid-state samples show an improvement of the sol-gel structure, which is evident from the V-J measurements.
