EFFECT OF HEAT TREATMENT ON THE PROPERTIES OF HIGH-TC BIBASED SUPERCONDUCTORS

Increase in critical temperature of superconductors is a major area of research. We have used ceramic technique in order to synthesize high Tc conductors. We have also studied the temperature dependence of the electrical resistivity of high-Tc Bismuth based superconductors. These superconductors have been prepared from the materials Bismuth Oxide (Bi_2O_3), Lead Oxide (PbO), Strontium Carbonate (SrCO_3), Calcium Carbonate (CaCO_3), Barium Oxide (BaO) and Copper Oxide (CuO) with conventional solid state reaction using general formula Bi_2Sr_2Ca_n-1CunO_2n+4+δ. The structural properties of the samples were investigated through X-ray diffraction analysis performed at room temperature. Electrical resistivity has been measured using four probe method. The critical temperature of the Bi-based superconductors has been found to be 100 K.