Preparation and characterization of perovskite-type Ln′Ln″1-xCoO3 for electroceramic applications

Yoshihiko Sadaoka*, Enrico Traversa, Masatomi Sakamoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Heteronuclear complexes of the type Ln′Ln″1-x[Co(CN)6]·nH2O have been synthesized for potential applications in solid oxide fuel cells. SmxE1-xCo and SmxYb1-xCo complexes crystallize in the orthorhombic system, as do LaxSm1-xCo complexes for x = 0-0.6. A plot of the lattice parameters of the orthorhombic structures of the complexes as a function of reff [= xrLn′ + (1-x)rLn″] shows linear behaviour similar to that observed for the LnCo complexes. For the decomposed products, perovskite-type Ln′xLn″1-xCoO3 oxides are obtained. The crystal structure of Ln′xLn″.1-xCoO3 is orthorhombic for 0.1080<reff/nm<0.1199 and hexagonal for reff>0.1199 nm, while for reff<0.1080 nm no perovskite-type oxide was formed. We suggest that the orthorhombic distortion parameter is greater than ca. 0.267 for reff< 0.1080 nm and therefore no perovskite-type oxide is formed.

Original languageEnglish (US)
Pages (from-to)1355-1360
Number of pages6
JournalJournal of Materials Chemistry
Volume6
Issue number8
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

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