Effect of dopant on superconductor Bi1.6Pb0.4Sr2Ca2-x MxCu3Oy (M = Ce, Na, Mg) phase 2223 by solid method

Abstract

The research of effect dopant on superconductor Bi1.6Pb0.4Sr2Ca2-x MxCu3OY (M = Ce, Na, Mg) where x = 0.0, 0.05, 0.15 have been formed to reach higher critical temperature Tc. The samples were prepared using highly pure powder as Bismuth (III) Oxide (Bi2O3 99%), Lead (IV) Oxide (PbO2 97%), Strontium Carbonate (SrCO3 96%), Calcium Carbonate (CaCO3 98,5%), Copper (II) Oxide (CuO 99%), Magnesium Oxide (MgO 99%), Cerium (IV) Oxide (CeO2 99%), Sodium Carbonate (Na2CO3 98%). The samples were heated at 300 °C for 6h. All samples were crushed in agate mortar and pestle for 6h. Its sample was having diameters of 10mm and thickness of 2mm, respectively. Then sintered in the furnace at a constant temperature of 850°C for 30h. Superconductivity behavior was formed using electric resistivity four probe measurement in which the sample with addition of 0.05 MgO, the highest Tc,onset is 118.2K and Tc,zero is 113.1K. For morphology analysis based on SEM found that the increase in grain size was relatively greater in the addition of dopants Mg and Ce, structural morphology and surface analysis X-ray diffraction (XRD) and critical temperature with Cryogenic.