The Effective of Pressure on the Physical Proprieties of Y₂Ba₄Cu₇O₁₅ Superconductor

Abstract:

The major problems that facing sustainability is the heat production with electricity transmission. The research and engineering communities hope that superconductive materials will be employed in the power transmission, without any losses along the way. Solid-state reaction is a one of the methods for preparing compound samples. This method was used to prepare the nominal chemical formula Y₂Ba₄Cu₇O₁₅. The calcining of the mixed powder at constant temperature of 800C0, followed by compressing the mixed, under (7, 8, 9) tons/cm2 pressures, as pallets shape with diameter 1.5 cm and thickness (0.2-0.3) cm inducing. The prepared samples were encounter many sintering processes through constant temperature. The sintering processes were done in the furnace by rising and cooling temperature with Oxygen rate 0.5 L/min. The samples were measured electrically to determine the resistivity changes in different temperatures (77–300) K, using four-probe technique. The results for the samples A, B and C shows the onset superconducting transition temperatures (Tc (onset)) at 88 K, 93 K, and 99 K respectively. The XRD data illustrated a polycrystalline structure for all samples. The transition temperature, oxygen content (δ) and the lattice parameter increase with increasing the pressure.

• Periodical: Materials Science Forum (Volume 1050)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1050.3
• Online since: January 2022
• Authors: Kareem Ali Jasim, Akram Hashim Taha, Auday H. Shaban*
• Keywords: Four-Probe Technique, Solid-State Reaction, Superconductor, Yttrium

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