Chatterjee, Minati and Naskar, Milan Kanti and Ganguli, Dibyendu (2002) Emulsion-ion extraction technique for synthesis of hollow bicomponent oxide microspheres. British Ceramic Transactions, 101 (5). pp. 221-224. ISSN 0967-9782

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Hollow oxide microspheres in the bicomponent systems Al2O3-28 wt-%SiO2 (AS) (mullite), Al2O3-13wt-%TiO2 (AT), and ZrO2-10wt-%Y2O3 (ZY) were prepared by the emulsion-ion extraction technique. Monodisperse microsphere formation was found to depend on the experimental parameters adopted during ion extraction and the surfactant concentration present in the emulsion system. Powder characteristics were investigated using X-ray diffraction, optical and scanning electron microscopy, and particle size analysis. The gel microspheres in the AS, AT, and ZY systems started crystallising at about 900,. 800, and 400degreesC respectively. The oxide microspheres were mostly spherical in morphology and the sphericity was retained even after calcination at 1300degreesC for 1 h. Formation of hollow microspheres with a single spherical cavity was identified by SEM. All oxide microspheres calcined at 1300degreesC for 1 h exhibited a particle size distribution within the range 5-60 mum, the average size (d(50)) varying from 19 to 22 mum. (C) 2002 IoM Communications Ltd. Published by Maney for the Institute of Materials, Minerals and Mining.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sol Gel
Depositing User: Bidhan Chaudhuri
Date Deposited: 22 Mar 2012 12:32
Last Modified: 26 May 2016 05:20

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