Karmakar, Basudeb and Kundu, Paritosh and Dwivedi, Ravindra Nath (2000) Infrared spectroscopic method for determination of thermal properties of fluorophosphate glasses. Journal of the American Ceramic Society, 83 (5). pp. 1305-1307. ISSN 0002-7820

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Abstract

Fluorophosphate glasses of the Ba(PO3)(2)-MgF2-CaF2-AlF3 system exhibit anomalous behavior, in regard to the glass-transition temperature (T-g) and the coefficient of thermal expansion (alpha(CTE)), at a fluoride concentration of similar to 36 mol%. A similar trend in the infrared band absorption coefficient (alpha(IR)) at 2170 cm(-1) of the overtone of 2 nu(ss)(OPO) and/or a combination of nu(as)(OPO)+nu(as)(POP) fundamental vibrations of PO4 tetrahedra also has been observed, relative to changes in the glass composition. Statistical analyses have shown that the T-g and alpha(CTE) values are correlated with alpha(IR) at 2170 cm(-1) by linear equations. The thermal properties of some of the glasses have been calculated using these equations, to test their validity and utility. The experimental property values of the glasses present a very good fit of data within a 95% confidence interval of the calculated mean values

Item Type:	Article
Subjects:	Glass
Divisions:	UNSPECIFIED
Depositing User:	Mrs Chandana Patra
Date Deposited:	09 Feb 2012 06:23
Last Modified:	06 Mar 2014 08:11
URI:	http://cgcri.csircentral.net/id/eprint/708

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