Structural data from X-ray powder diffraction for new high-temperature phases (Y1-xLnx)2Si2O7 with Ln=Ce, Pr, Nd (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Structural data from X-ray powder diffraction for new high-temperature phases (Y1-xLnx)2Si2O7 with Ln=Ce, Pr, Nd (Articolo in rivista) (literal)

Anno

• 2002-01-01T00:00:00+01:00 (literal)

Alternative label

• F. Monteverde, G. celotti (2002)
  Structural data from X-ray powder diffraction for new high-temperature phases (Y1-xLnx)2Si2O7 with Ln=Ce, Pr, Nd
  in Journal of the European Ceramic Society
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• F. Monteverde, G. celotti (literal)

Pagina inizio

• 721 (literal)

Pagina fine

• 730 (literal)

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• 22 (literal)

Rivista

• Journal of the European Ceramic Society (Rivista)

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• ISTEC-CNR (literal)

Titolo

• Structural data from X-ray powder diffraction for new high-temperature phases (Y1-xLnx)2Si2O7 with Ln=Ce, Pr, Nd (literal)

Abstract

• Extending the investigation on possible mixed phases with composition (Y1?xLnx)2Si2O7 formed at high temperature under oxidizing conditions in silicon nitride samples doped with Y2O3 and Ln2O3 as sintering aids, the compounds with Ln=Ce, Pr, Nd were successfully synthesized and structurally characterized by Rietveld whole powder pattern refinement. Some fluctuations in the x values were found as well, but all the compounds are monoclinic (space group P21/c), with lattice parameters close to those of the previously studied (Y2/3La1/3)2Si2O7. Further efforts with Sm (and Dy) failed in producing the expected G-form phase, indicating that the family does not extend beyond Nd: in these cases Ln ions partially substitute Y in its already known a- and d-disilicates. Under the adopted experimental conditions (1 atm, ambient air), an explanation of the impossibility to obtain the phase in question containing lanthanides with Z higher than 62 was attempted on the basis of lattice strains introduced by foreign ions larger than Y. (literal)

Prodotto di

• Produzione, lavorazione e caratterizzazione di ceramici e compositi strutturali a progettazione funzionale (SP.P01.008.001) (Modulo)
• Institute of science and technology for ceramics (ISTEC) (Istituto)

Autore CNR

• FREDERIC TULLIO MONTEVERDE (Unità di personale interno)
• GIANCARLO CELOTTI (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Structural data from X-ray powder diffraction for new high-temperature phases (Y1-xLnx)2Si2O7 with Ln=Ce, Pr, Nd" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Produzione, lavorazione e caratterizzazione di ceramici e compositi strutturali a progettazione funzionale (SP.P01.008.001) (Modulo)

Autore CNR di

• FREDERIC TULLIO MONTEVERDE (Unità di personale interno)
• GIANCARLO CELOTTI (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of the European Ceramic Society (Rivista)

Insieme di parole chiave di

• Parole chiave di "Structural data from X-ray powder diffraction for new high-temperature phases (Y1-xLnx)2Si2O7 with Ln=Ce, Pr, Nd" (Insieme di parole chiave)