Synthesis of nanocrystalline yttria through in-situ sulphated-combustion technique

Ramalinga Viswanathan Mangalaraja, Solaiappan Ananthakumar, Johanne Mouzon, Kasimayan Uma, Marta Lopéz, Carlos Porro Camurri, Magnus Odén

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An in-situ sulphated-combustion reaction was conducted on the precursor mixture consisting of yttrium nitrate, organic fuels (urea, citric acid and glycine) and 10 mol% ammonium sulphate [(NH4)2SO 4] at 500°C. Effect of sulphate addition on yttria particles morphology has been analyzed with respect to the types of fuels. In un-sulphated combustion, the calcined yttria powders showed rectangular particle morphology and low specific surface area. Whereas in sulphated-combustion spherical shaped yttria particles were achieved for glycine fuel. In the case of citric acid fuel, yttria powders with high specific surface area [26 m2/g] were obtained. For all the fuels, the sulphated-combustion reaction produced nanocrystalline yttria powders and they also had primary crystallite size below 4 nm in the as prepared conditions. Upon calcination at 1100°C, these powders attained mean particle size of 50 nm which was confirmed by TEM.

Original languageEnglish
Pages (from-to)1065-1068
Number of pages4
JournalJournal of the Ceramic Society of Japan
Issue number1370
StatePublished - Oct 2009
Externally publishedYes


  • Combustion
  • Morphology
  • SO ions
  • Yttria


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