Low temperature synthesis of Y3NbO7 by polymerizable complex method: Utilization of a methanol-citric acid solution of NbCl5 as a novel niobium precursor

Toru Okubo, Masato Kakihana

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35 Citations (Scopus)


A modified polymerizable complex method was used to prepare pure Y3NbO7 powders at reduced temperature. To acquire a niobium-containing solution stable enough for the polymerizable complex processing, methanol was chosen to solvate NbCl5. Dissolution of NbCl5 in methanol gave a colorless transparent solution, to which citric acid (CA), yttrium carbonate and ethylene glycol (EG) were added successively to produce a transparent solution containing yttrium-CA complexes and niobium-CA complexes. The solution was heated at ∼130°C to remove excess methanol and promote esterification between CA and EG to yield a transparent polymeric resin without precipitation; this material was used subsequently as a precursor for Y3NbO7. The formation of Y3NbO7 occurred when the resin precursor was heat-treated at 500°C for 2 h in static air.

Original languageEnglish
Pages (from-to)151-154
Number of pages4
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 1997 Jul 5
Externally publishedYes


  • Niobium precursor
  • Polymerizable complex method
  • YNbO

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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