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Phase formation of REBa2Cu3O7−δ (RE: Y0.5Gd0.5, Y0.5Nd0.5, Nd0.5Gd0.5) superconductors from nanopowders synthesised via co-precipitation


Citation

Wahid, Mohd Haniff and Zainal, Zulkarnain and Hamadneh, Imad (Moh'd Khair) Rashid and Tan, Kar Ban and Shaari, Abdul Halim and Rosli, A. M. and Al Aghbari, Elyas Sadeq Sulaiman and Nazarudin, Muhammad Farhan and Kadri, E. F. (2012) Phase formation of REBa2Cu3O7−δ (RE: Y0.5Gd0.5, Y0.5Nd0.5, Nd0.5Gd0.5) superconductors from nanopowders synthesised via co-precipitation. Ceramics International, 38 (2). pp. 1187-1193. ISSN 0272-8842; ESSN: 1873-3956

Abstract

Phase formation of REBa2Cu3O7−δ (RE: Y0.5Gd0.5, Y0.5Nd0.5, Nd0.5Gd0.5) superconductors synthesised via co-precipitation (COP) method were investigated by thermogravimetric analysis (TGA), differential thermal analysis (DTA) and X-ray diffraction (XRD) analysis. All samples showed identical thermal decomposition behaviour from the thermogram in which 5 major weight losses were observed. However, XRD of the samples at different heat treatment temperatures showed different diffraction patterns indicating different thermolytic processes. Meanwhile, transmission electron microscopy and surface area analysis revealed that the powders obtained from COP have particle sizes ranging from 7 to 12 nm with relatively large surface area. Molar ratios of prepared samples obtained were near to the theoretical values as confirmed by elemental analyses using X-ray fluorescence (XRF). The TC(R=0) for sintered YGd, YNd and NdGd were 87 K, 86 K and 90 K, respectively. Surface morphological study via scanning electron microscope showed the structures of samples were dense and non porous.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1016/j.ceramint.2011.08.048
Publisher: Elsevier and Techna Group
Keywords: Oxide; Superconductor; Powders: chemical preparation; Chemical properties
Depositing User: Nur Farahin Ramli
Date Deposited: 16 Jul 2013 02:07
Last Modified: 18 Apr 2017 03:58
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.ceramint.2011.08.048
URI: http://psasir.upm.edu.my/id/eprint/25189
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