Synthesis of Y-doped BaCeO3 nanopowders by a modified solid-state process and conductivity of dense fine-grained ceramics (Articolo in rivista)

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  • Synthesis of Y-doped BaCeO3 nanopowders by a modified solid-state process and conductivity of dense fine-grained ceramics (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.ssi.2008.12.026 (literal)
Alternative label
  • Alessio Bassano; Vincenzo Buscaglia; Massimo Viviani; Marta Bassoli; Maria Teresa Buscaglia; Mohamed Sennour; Alain Thorel; Paolo Nanni (2009)
    Synthesis of Y-doped BaCeO3 nanopowders by a modified solid-state process and conductivity of dense fine-grained ceramics
    in Solid state ionics (Print); Elsevier BV, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Alessio Bassano; Vincenzo Buscaglia; Massimo Viviani; Marta Bassoli; Maria Teresa Buscaglia; Mohamed Sennour; Alain Thorel; Paolo Nanni (literal)
Pagina inizio
  • 168 (literal)
Pagina fine
  • 174 (literal)
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  • http://puma.isti.cnr.it/linkres.php?resource=cnr.ieni/cnr.ieni.ge/2009-A0-017 (literal)
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  • 180 (literal)
Rivista
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  • In: Solid State Ionics, vol. 180 (2-3) pp. 168 - 174. Elsevier, 2009. (literal)
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  • 7 (literal)
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  • 2-3 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
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  • CNR-IENI, Genova; Mines ParisTech, CNRS, Evry, France; DICheP-UNIGE, Genova Italy (literal)
Titolo
  • Synthesis of Y-doped BaCeO3 nanopowders by a modified solid-state process and conductivity of dense fine-grained ceramics (literal)
Abstract
  • Powders of BaYxCe1-xO3-delta (x=0, 0.1 and 0.15) with specific surface area of 6-8 m(2)g(-1) (BET equivalent particle size of 130-160 nm) were prepared by a modified solid-state route using nanocrystalline BaCO3 and CeO2 raw materials. These powders showed excellent densification at relatively low temperatures. Dense (96-97% relative density) ceramics with submicron grain size (0-4-0.6 mu m) were obtained after sintering at 1250-1280 °C. Ceramics sintered at 1450 °C revealed only a moderate grain growth (grain size = 98%). The total conductivity of the submicron ceramics at 600 °C was comparable with the reference values reported in the literature, meaning that the high number of grain boundaries was not a limiting factor. On lowering temperature, the contribution of the blocking grain boundaries becomes progressively more important and the conductivity decreases in comparison to coarse-grained ceramics. Microscopic conductivities of grain interior and grain boundary are the same irrespective of grain size meaning that the different macroscopic behaviour is only determined by a geometric factor (a trivial size effect). (literal)
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