Abstract
This work was performed to investigate the effect of sintering time on superconducting properties of Bi1.7In0.3Pb0.3Sr2Ca2Cu3O10+d samples prepared by solid state reaction method. The samples properties have been investigated structurally by X-ray diffraction and morphologically by scanning electron microscopy. Structural analysis showed that two superconducting phases coexist in the samples. High temperature Bi-2223 and low-temperature phase 2212 with orthorhombic structure for all samples. Four point probe method used to study the electrical properties of the samples and the results showed that increasing sintering time yields superconductor samples. The sintering time 140 h improves the microstructure of the superconductor and produces greater size platelets as well as leading to the highest TC value of 113 K and highest oxygen content value. Scanning electron microscopy shows increasing sintering time changed morphology of samples. Moreover plate grains of the high Bi-2223 phase appeared in most micrographs of the superconducting samples.
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