Growth and structural characterization of needlelike crystals in the Y-Ba-Cu-O system (Articolo in rivista)

Type
Label
  • Growth and structural characterization of needlelike crystals in the Y-Ba-Cu-O system (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/cg050519c (literal)
Alternative label
  • Mele, P; Ubaldini, A; Carnasciali, MM; Costa, GA; Scavini, M (2006)
    Growth and structural characterization of needlelike crystals in the Y-Ba-Cu-O system
    in Crystal growth & design; American Chemical Society, Washington (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mele, P; Ubaldini, A; Carnasciali, MM; Costa, GA; Scavini, M (literal)
Pagina inizio
  • 1761 (literal)
Pagina fine
  • 1765 (literal)
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  • 6 (literal)
Rivista
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  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Milan, Dipartimento Chim Fis & Elettrochim, I-20133 Milan, Italy; Univ Genoa, INFM, LAMIA, I-16146 Genoa, Italy; Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy (literal)
Titolo
  • Growth and structural characterization of needlelike crystals in the Y-Ba-Cu-O system (literal)
Abstract
  • A system formed by a bar of Y2BaCuO5 (Y211) phase supported on two YBa2Cu3Ox (Y123) pellets was processed by thermal treatment at high temperature. The first effect was a change in chemical composition inside the bar, yielding new phases: mostly Y123 and BaCuO2. Their concentrations were higher near the bar ends. A second, very interesting result was the growth of two kinds of acicular crystals underneath the whole bar: green, transparent Y211 needles and needles with a green core of Y211, covered by a Y123 layer. Micro Raman and SEM analyses clearly identified the two different phases. XRD inspection has confirmed that Y211 crystals are high-quality single crystals. The preferential growth direction for Y211 needles is along the crystallographic b axis. A possible explanation, based on the VLS mechanism, for their growth is suggested. (literal)
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