Naskar, Milan Kanti and Kundu, Debtosh and Chatterjee, Minati (2011) Coral-like hydroxy sodalite particles from rice husk ash as silica source. Materials Letters, 65 (23-24). pp. 3408-3410. ISSN 0167-577X

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Abstract

Coral-like hydroxy sodalite (HS) particles were prepared from rice husk ash as silica source in the presence of other aqueous-based precursor materials following a simple process under hydrothermal condition at 90 degrees C for 15 h. The particles obtained at 90 degrees C for different times (6, 10 and 15 h) were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and field emission scanning electron microscopy (FESEM). The HS crystals along with a small amount of zeolite A particles were observed at 90 degrees C/6 h while phase pure HS particles were obtained at 90 degrees C for 10 and 15 h. The characteristic vibration bands of the HS particles were confirmed by FTIR spectroscopy. FESEM images showed that the HS particles obtained at 90 degrees C/15 h were coral-like morphology which were formed through the self-assembly of the smaller particles generated at the initial stage of reaction (6 and 10 h) under the same experimental conditions. A proposed mechanism for the formation of coral-like HS particles was also illustrated. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Hydroxy sodalite; Rice husk ash; Hydrothermal; Crystallization; Microstructure
Subjects:	Structural Clay Products
Divisions:	Sol Gel
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Jan 2012 12:08
Last Modified:	25 Feb 2013 08:26
URI:	http://cgcri.csircentral.net/id/eprint/304

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