Biswas, Mita and Sahoo, Aditi and Muraleedharan, K and Bandyopadhyay, Siddhartha (2021) Crystal Structure of 27R-SiAlON Synthesized Under Carbothermal Nitridation. Transactions of the Indian Ceramic Society, 80 (1). pp. 1-5. ISSN 0371-750X

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Abstract

Laboratory synthesized (carbothermal-reduction-nitridation) 27R-SiAlON is studied in terms of crystallographic and microscopic features by detailed X-ray diffraction and electron microscopy experiments. 27R- SiAlON is analyzed to possess rhombohedral R3m structure and is best represented as Si1.1Al7.9O1.9N8.1. Lattice parameters, ion positions, bond lengths, angles as well as the crystallite size and strain have been determined for the constituent phase. The R3m phase in hexagonal setting exhibits enormous anisotropy with pseudo-tetragonality ratio c/a root 6 similar to 10. The electron microscopy too offers evidence of preferential growth of platelike crystals of SiAlON due to its large c-axis.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Bidhan Chaudhuri
Date Deposited:	14 Dec 2021 07:04
Last Modified:	14 Dec 2021 07:04
URI:	http://cgcri.csircentral.net/id/eprint/5242

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