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All Journal AMPLITUDO: Journal of Science & Technology Innovation Journal of Material Science and Radiation
Kien, Chen Soo
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Materials Science & Nanotechnology Physics

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Influence of Carbon Nanotubes in Improving the Superconducting and Structural Properties of Bulk Bi-2212 Synthesis by Thermal Treatment Method Sukor, Safia Izzati Abd; Kechik, Mohd Mustafa Awang; Kamarudin, Aliah Nursyahirah; Shaari, Abdul Halim; Kien, Chen Soo; Pah, Lim Kean; Shariff, Khairul Khaizi Mohd; Shabdin, Muhammad Kashfi; Yaakob, Yazid; Karim, Muhammad Khalis Abdul; Doyan, Aris
AMPLITUDO : Journal of Science and Technology Innovation Vol. 3 No. 2 (2024): August
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/amplitudo.v3i2.224

Abstract

Bi-2212 superconductor has garnered significant interest in recent years due to its potential applications in the development of superconducting wires and tapes. The effect of introducing carbon nanotubes (CNT) into the Bi-2212 system was investigated in terms of superconducting and structural properties. The results of this study indicated that the addition of CNTs had a notable effect on the phase formation of Bi-2212,  with a substantial increase from 86.8% to 97.4% for the sample with a weight percentage of 0.8 wt.%.  This can be attributed to the improved particle orientation brought about by the introduction of CNTs.  The microstructure analysis displayed randomly distributed grains of irregular shapes, with a reduced average grain size of 1.018 μm upon the addition of 0.4 wt.% CNTs. Additionally, the inclusion of CNTs led to an increase in the Tc value, with the maximum Tc-onset recorded at 79 K for the sample containing 0.6 wt.% CNTs.  In summary CNT has enhanced the structural  and the superconducting properties of the Bi-2212 synthesised with thermal treatment method.
Comparative Study of Y123 Superconductors Synthesized Under Open Air and Oxygen Flow Conditions Kamarudin, Aliah Nursyahirah; Kechik, Mohd Mustafa Awang; Khairudin, Muhammad Azri; Kien, Chen Soo; Pah, Lim Kean; Shabdin, Muhammad Kashfi; Shaari, Abdul Halim
Journal of Material Science and Radiation Vol. 1 No. 3 (2025): December
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/jmsr.v1i3.426

Abstract

YBa₂Cu₃O₇₋δ (Y123) superconductors is a widely studied high-temperature superconductor due to its high critical temperature, Tc and strong flux pinning properties. In this study, Y123 samples were synthesized via a thermal treatment method under two sintering conditions which were open air and oxygen flow. Structural, microstructural, and superconducting properties were evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and AC susceptibility measurements. XRD analysis revealed that all Y123 samples exhibited predominantly Y123 phase with orthorhombic structure, with minor secondary phases. The Y123 sample prepared in an open-air condition exhibited larger grain size (0.698 µm), lower porosity, and fewer impurities compared to sample prepared in the oxygen flow condition. AC susceptibility showed a higher Tc-onset exhibited at 92.1 K in the open-air sample, indicating better grain connectivity. These results suggest that open-air sintering offers a simpler, cost-effective route for enhancing Y123 superconductor performance.
Co-Authors Aris Doyan Kamarudin, Aliah Nursyahirah Karim, Muhammad Khalis Abdul Kechik, Mohd Mustafa Awang Khairudin, Muhammad Azri Pah, Lim Kean Shaari, Abdul Halim Shabdin, Muhammad Kashfi Shariff, Khairul Khaizi Mohd Sukor, Safia Izzati Abd Yaakob, Yazid