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All Journal AMPLITUDO: Journal of Science & Technology Innovation Journal of Material Science and Radiation
Shaari, Abdul Halim
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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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Journal : Journal of Material Science and Radiation

 1 
Comparative Characterisation of Structural and Superconducting Properties of Y-123 and Y-247 Synthesised by Thermal Treatment at 980 °C Yap, Siew Hong; Er, Tai Pao; Kechik, Mohd Mustafa Awang; Karim, Muhammad Khalis Abdul; Baqiah, Hussien; Chen, Soo Kien; Lim, Kean Pah; Shabdin, Muhammad Kashfi; Hapipi, Nurhidayah Mohd; Kamarudin, Aliah Nursyahirah; Mohamed, Arebat Ryad Alhadei; Doyan, Aris; 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.v1i3.425

Abstract

This study presents a comparative analysis of the structural and superconducting properties of YBa₂Cu₃O₇−δ (Y-123) and Y₂Ba₄Cu₇O₁₅−δ (Y-247) superconductors synthesised via a thermal treatment method at 980 °C. Metal nitrates were used as starting precursors, with polyvinylpyrrolidone (PVP) serving as a capping agent to enhance dispersion and control microstructure. X-ray diffraction (XRD) confirmed that Y-123 and Y-247 were the dominant phases in their respective samples, although minor peaks of BaCuO₂ were detected, indicating the presence of secondary phases. Scanning electron microscopy (SEM) revealed that Y-247 exhibited larger grain morphology and higher porosity than Y-123, suggesting that the chosen sintering temperature exceeds the thermal stability range for the Y-247 phase. Electrical resistivity measurements showed a single superconducting transition for both samples, with Y-123 exhibiting a sharper transition width (ΔTc = 8.1 K) compared to Y-247, indicating better grain connectivity and phase uniformity. Energy dispersive X-ray spectroscopy (EDX) supported the elemental presence of Y, Ba, Cu, and O in both samples, though variations in stoichiometry were attributed to secondary phases. The observed expansion in the c-axis lattice of Y-247, combined with its higher porosity, points to oxygen loss during sintering, which contributes to the reduced superconducting performance. Overall, the results confirm that both Y-123 and Y-247 can be successfully synthesised using a simple and environmentally friendly thermal treatment method. However, Y-123 exhibits better structural integrity and superconducting performance at the high sintering temperature of 980 °C, making it a more promising candidate for large-scale production of bulk high-temperature superconductors.
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.
Influence of Sintering Temperatures on Pr0.7Ba0.3MnO3 Prepared Using Thermal Treatment Method Hon, Xiao Tong; Lim, Kean Pah; Lau, Lik Nguong; Kechik, Mohd Mustafa Awang; Chen, Soo Kien; Shabdin, Muhammad Kashfi; Hapipi, Nurhidayah Mohd; Rohiat, Najihah; 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.v1i3.478

Abstract

In this work, Pr0.7Ba0.3MnO3 (PBMO) was synthesised using a thermal treatment method with sintering temperature ranging from 800 °C to 1100 °C. X-ray diffraction (XRD) confirmed the formation of pure PBMO phase at 1100 °C, while lower sintering temperatures led to the presence of secondary phase, particularly Pr(Mn2O5). Microstructural analysis revealed significant grain growth with rising sintering temperatures, accompanied by enhanced crystallinity and reduced secondary phases. Magnetic measurements indicated ferromagnetic behaviour at room temperature for all samples. However, the electrical resistivity demonstrates an unexpected increase with sintering temperature, attributed to the influence of secondary phase at lower sintering temperatures and grain growth in the pure PBMO phase at higher sintering temperatures. Additionally, microstructural defects such as oxygen non-stoichiometry or porosity might further contribute to the suppression of the metal-insulator transition temperature. Overall, this study highlights the significant role of sintering temperatures in controlling the phase purity, microstructure and physical behaviour of PBMO samples, offering valuable insights for their potential applications in spintronics or magnetic sensing devices.
Co-Authors Aris Doyan Baqiah, Hussien Chen, Soo Kien Er, Tai Pao Hapipi, Nurhidayah Mohd Hon, Xiao Tong Kamarudin, Aliah Nursyahirah Karim, Muhammad Khalis Abdul Kechik, Mohd Mustafa Awang Khairudin, Muhammad Azri Kien, Chen Soo Lau, Lik Nguong Lim, Kean Pah Mohamed, Arebat Ryad Alhadei Pah, Lim Kean Rohiat, Najihah Shabdin, Muhammad Kashfi Shariff, Khairul Khaizi Mohd Sukor, Safia Izzati Abd Yaakob, Yazid Yap, Siew Hong