Chatterjee, Minati and Naskar, Milan Kanti and Siladitya, B and Ganguli, Dibyendu (2000) Role of organic solvents and surface-active agents in the sol-emulsion-gel synthesis of spherical alumina powders. Journal of Materials Research, 15 (1). pp. 176-185. ISSN 0884-2914

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Abstract

Spherical alumina particles were prepared following the sol-emulsion-gel method by systematic variation of (i) the concentration of the surfactant Span 80 above or below the critical micelle concentration (CMC) in different organic solvents and (ii) hydrophilic-lipophilic balance (HLB) of different surfactants in cyclohexane. The experimentally determined CMC of Span 80 was found to increase with increasing dielectric constant of the organic solvent, influencing the sol droplet and alumina particle size. With an increase in the HLB value of the surfactants, the tendency of monodispersed sphere formation among the particles increased with a decrease in the size distribution and average particle size (d(50)).

Item Type:	Article
Uncontrolled Keywords:	organic solvents, surface-active agents, sol-emulsion-gel synthesis, spherical alumina powders
Subjects:	Processing Science
Divisions:	Sol Gel
Depositing User:	Mrs Chandana Patra
Date Deposited:	10 Feb 2012 10:36
Last Modified:	26 May 2016 05:22
URI:	http://cgcri.csircentral.net/id/eprint/751

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