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'Synthesis' in keywords Facet   section ZfN Section A  [X]
Facet   Publication Year 1994  [X]
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1994[X]
1Author    Paolo Ghigna, M. Arco, ScaviniRequires cookie*
 Title    Kinetics and Mechanism of Nd2C u04 Synthesis  
 Abstract    The reaction N d20 3 -I-C uO -*■ N d 2C u 0 4 was investigated on the basis of the Wagner-Schmalz-ried theory of diffusion-driven reactions between crystalline solids, with the help of monodimen­ sional chemical diffusion measurements. It was found that the kinetics of the process is governed by C u2+ diffusion, and the chemical diffusion coefficient Z)(Cu2+) in the N d 2C u 0 4 matrix was obtained (9.9 • 10-13, 1.97 • 10-12 and 1.98 • 10" 11 cm 2 s -1 at 1223, 1273 and 1323 K, respectively). The rela­ tively low value of D (C u2+) was interpreted on the basis of the crystal structures of the compound and related materials, which in addition may suggest an alternative rationale for the interpretation of neodymium immobility. 
  Reference    Z. Naturforsch. 49a, 611—616 (1994); received M arch 14 1994 
  Published    1994 
  Keywords    N d 2C u 0 4 superconductor, Synthesis, Reaction mechanism, Kinetics, Chemical diffu­ sion 
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 TEI-XML for    default:Reihe_A/49/ZNA-1994-49a-0611.pdf 
 Identifier    ZNA-1994-49a-0611 
 Volume    49