Polymerized complex route to synthesis of pure Y2Ti2O7 at 750°C using yttrium-titanium mixed-metal citric acid complex

Masato Kakihana, Maria M. Milanova, Momoko Arima, Toru Okubo, Masatomo Yashima, Masahiro Yoshimura

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A polymerized complex technique was used to prepare high-purity pyrochlore Y2Ti2O7 powders at 750°C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and yttrium and titanium ions, with a molar ratio of CA:EG:Y:Ti = 5:20:1:1, at 130°C produced a yellowish transparent polymeric gel without any precipitation; this material was used subsequently as a precursor for Y2Ti2O7. Based on the results of 13C-NMR spectroscopy, it was suggested that a mixed-metal (Y,Ti)-CA3 chelate complex formed in a starting CA/EG solution. The formation of pure pyrochlore Y2Ti2O7 occurred when the precursor was heat-treated in a furnace set at 750°C in static air for 4 h.

Original languageEnglish
Pages (from-to)1673-1676
Number of pages4
JournalJournal of the American Ceramic Society
Issue number6
Publication statusPublished - 1996 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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