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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Superconducting properties of polycrystalline YBa
2
Cu
3
O
7 - D
prepared by sintering of ball-milled precursor powder
Ceramics International, Volume 40, No. 1 PART B, Year 2014
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Description
The effect of ball milling on the superconducting properties of polycrystalline YBa2Cu3Oy compounds has ben studied. The samples were synthesized by a solid state reaction by considering a thermal cycle with two stages of sintering at 950 C separated by intermediate crushing; a traditional crushing (in a mortar) and another energetic (in a planetary crusher). The correlations between milling parameters, microstructure and superconducting properties have been investigated. The samples were characterized by X-ray diffraction, energy dispersive spectrometry and scanning electron microscopy. The critical current density of the samples was examined using current-voltage, ac-susceptibility and magnetization measurements. The temperature dependence of the resistivity under magnetic field has been studied to evaluate the upper critical and the irreversibility magnetic fields of these samples. It is demonstrated that ball milling is an effective approach for obtaining fine particles with size about 15 nm gathered into coral-like agglomerates and embedded in the matrix. Such decorated finer structure contributes to the enhancement of the inter-grains and intra-grains critical current density of the material under an applied magnetic field. © 2013 Elsevier Ltd and Techna Group S.r.l.
Authors & Co-Authors
Hamrita, A.
Tunisia, Tunis
University of Carthage
Slimani, Yassine Abdelhamid
Tunisia, Tunis
University of Carthage
Ben Salem, M. K.
Tunisia, Tunis
University of Carthage
Hannachi, Essia
Tunisia, Tunis
University of Carthage
Bessais, Lotfi
France, Thiais
Institut de Chimie et Des Matériaux de Paris Est Icmpe - Umr7182
Ben Azzouz, F.
Tunisia, Tunis
University of Carthage
Ben Salem, Mohamed K.
Tunisia, Tunis
University of Carthage
Statistics
Citations: 75
Authors: 7
Affiliations: 2
Identifiers
Doi:
10.1016/j.ceramint.2013.07.030
ISSN:
02728842