Preparation and physical properties of Y-Ba-Na-Cu-O high-T sub(c) superconductors

This paper studies the Y-Ba-Na-Cu-O system in detail. Sodium-doped samples corresponding to nominal composition Y sub(0.3)Ba sub(0.7-x)Na sub(x)CuO sub(7- delta ) are prepared from high purity powder reagents of Y sub(2)O sub(3), BaCaO sub(3), CuO and Na sub(2)C sub(2)O sub(4). Heating of the mixtur...

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Bibliographic Details
Published inJournal of materials science letters Vol. 15; no. 8; pp. 680 - 682
Main Authors Ramay, S M, Yousaf, M, Maqsood, M, Maqsood, A
Format Journal Article
LanguageEnglish
Published 01.01.1996
Subjects
Composition
Cooling
Doping (additives)
Electric conductivity
Heating
Lattice constants
Moisture
Physical properties
Short circuit currents
Sodium
X ray diffraction
Yttrium compounds
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Summary:This paper studies the Y-Ba-Na-Cu-O system in detail. Sodium-doped samples corresponding to nominal composition Y sub(0.3)Ba sub(0.7-x)Na sub(x)CuO sub(7- delta ) are prepared from high purity powder reagents of Y sub(2)O sub(3), BaCaO sub(3), CuO and Na sub(2)C sub(2)O sub(4). Heating of the mixture is carried out at 800 degree C for 24 h and the furnace is cooled to room temperature. To find the electrical d.c. resistivity of the samples, the usual four-probe technique is adopted.
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ISSN:0261-8028