The Influence of Sintering Time in High and Low Density Bi-2223 Superconductor

Abstract:

The effects of sintering time in high and low density Bi-2223 phase formation have been investigated. The samples were prepared by the solid-state reaction method at various sintering times ranging from 24, 48, 72 and 96 hours. Sucrose was added during palletization and after heated at 400°C for two hours the sucrose was removed and hence low density sample was created. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and critical current density. The transition temperature varies between 102 K and 96 K with increasing of sintering times. The optimal sintering time of the samples Bi-2223 system was found at 850°C for 72 hours. The critical current density, J_C of high density and low density Bi-2223 was measured to be 7.547 A/cm² and 8.333 A/cm² respectively at 77 K under zero magnetic field. The critical current density, J_C and superconductivity transition temperature, T_C of low density were found to be higher than the pure samples. The critical transition temperature increased with a short gap between T_{C onset} and T_{C zero}. The most intense peak in the XRD pattern of sample at sintering time 72 hours belong to the high-T_C phase which also indicates an increase in the volume fraction of the high-T_C phase with optimum sintering time.

• Periodical: Advanced Materials Research (Volume 1107)
• Pages: 616-621
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1107.616
• Online since: June 2015
• Authors: M. Robaiah*, H. Azhan, K. Azman, I.N. Syuhaida, C.M.N. Azura, M.M. Mustaqim
• Keywords: Critical Current Density, Low Density Bi-2223 Superconductor, Sintering Time

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