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Synthesis of nanocrystalline yttria through in-situ sulphated-combustion technique
Universidad de Concepción.
NIIST, Materials & Minerals Division, Kerala.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0003-4582-0902
Nagoya Institute of Technology.
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2009 (English)In: Ceramic Society of Japan. Journal, ISSN 1882-0743, Vol. 117, no 1370, p. 1065-1068Article 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)(2)SO4] at 500 degrees 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 m(2)/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 degrees C, these powders attained mean particle size of 50 nm which was confirmed by TEM.

Place, publisher, year, edition, pages
2009. Vol. 117, no 1370, p. 1065-1068
National Category
Chemical Process Engineering Other Materials Engineering
Research subject
Chemical Technology; Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-3242Local ID: 10abd5a0-c7ad-11de-b769-000ea68e967bOAI: oai:DiVA.org:ltu-3242DiVA: diva2:976098
Note
Validerad; 2009; 20091102 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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