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Synthesis of nanocrystalline yttria through in-situ sulphated-combusion technique
University of Concepción, Chile.
National Institute ofr Interdisciplinary Science and Technology, India. (Materials and Minerals Division)
Luleå University of Technology. (Division of Engineering Materials)
Nagoya Institute of Technology.
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2009 (English)In: Journal of the Ceramic Society of Japan, ISSN 09145400, Vol. 117, no 1370, 1065-1068 p.Article in journal (Refereed) Published
Abstract [en]

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)2SO4] 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.

Place, publisher, year, edition, pages
Ceramic Soc of Japan , 2009. Vol. 117, no 1370, 1065-1068 p.
Keyword [en]
Yttria, Combustion, SO4 ions, Morphology
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-21873DOI: 10.2109/jcersj2.117.1065ISI: 000271001100003OAI: diva2:241877
Available from: 2010-02-02 Created: 2009-10-06 Last updated: 2013-10-02Bibliographically approved

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Odén, Magnus
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