Open AccessSynthesis and characterization of Ln-123 superconductors
Author(s) -
Artūras Žalga,
Juskenas Remigijus,
Algirdas Selskis,
Darius Jasaitis,
Aivaras Kareiva
Publication year - 2008
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0804479z
Subject(s) - lanthanide , stoichiometry , scanning electron microscope , superconductivity , materials science , characterization (materials science) , nuclear chemistry , diffraction , analytical chemistry (journal) , crystallography , x ray crystallography , chemistry , nanotechnology , ion , chromatography , physics , organic chemistry , optics , composite material , quantum mechanics
A sol-gel method was applied to prepare precursors for NdBa2Cu3O7-x (Nd-123) and SmBa2Cu3O7-x (Sm-123) superconducting compounds. The sin- tered products were examined by X-ray diffraction analysis (XRD) and scan- ning electron microscopy (SEM). The powders sintered at 950 and 1000 °C showed the formation of monophasic Nd-123 and Sm-123 superconductors. The formation of Nd-123 and Sm-123 phases from the sol-gel derived pre- cursors at higher temperatures (1050 and 1100 °C), however, did not proceed due to the melting process. The correlation between the TC for different lan- thanides (Ln - Ho, Nd and Sm) in the Ln-123 compound and orthorhombicity and oxygen stoichiometry were also estimated.
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