Fabrication and Characterization of Porous and Non-Porous Y₂CaBa₄Cu₇O_δ Superconductor

Abstract:

These study unveils the comparative properties of Y123 and YCa₂Ba₄Cu₇Oy in terms of their porous and non-porous structure. The materials are optimized and improved by determining the balance factor between calcium doped substance and critical temperature (T_c). Solid state reaction method was used to fabricate the ceramic materials through a series of heating and grinding. The electrical properties of superconductor via to critical temperature, T_c and critical current density, J_c was determined using Resistivity Measurement System (RMS). The structural properties and morphology of particular material was analyzed by using X-Ray Diffraction (XRD) and Scanning Electron Microscopy respectively. The orthorhombicity parameters were reduced due to substitution of Y ³⁺ ion by Ca²⁺ ion. The critical temperature for porous structure was less than non porous structure for Ca doped Y247 system. The highest critical current density (J_c) was porous YBa₂Cu₃O_y which is 1.79A/cm² instead 0.48 A/cm² for porous Y₂CaBa₄Cu₇O_y. SEM micrograph showed the J_c is induced significantly by continuity of grain formation via grain size. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}

• Periodical: Advanced Materials Research (Volume 895)
• Pages: 95-98
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.895.95
• Online since: February 2014
• Authors: S.A. Senawi, H. Azhan, M.S.M. Yusof, W.A.W. Razali, Abd Wahab Norazidah, Hassan Nurul Hidayah, J.S. Hawa, H.J.M. Ridzwan
• Keywords: Critical Temperature, Current Density, Superconductor, YBCO

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