| Infrared Spectroscopic Method for Estimating Physical
Properties of Metaphosphate Glasses |
B. KARMAKAR, P. KUNDU AND R.N. DWIVEDI
pages : 19-22
DOI : 10.1080/0371750X.1999.10799850 |
| Abstract |
| Calcium metaphosphate glass has been dehydroxylated
under vacuum and by calcium fluoride addition. The first
overtone band of Vss(OPO) and/or combinational band of
V0,(0PO) + v.,(POP) at around 2170 em-• in the infrared
(IR) spectra of the glasses, not originally observed in high
hydroxyl (OH) containing glasses, has been found to develop
gradually with the progress of dehydroxylation. The
absorption coefficient of this band has been statistically
correlated with density, refractive index and glass transition
temperature of low OH containing glasses in the form of
equations. Each of these equations has high correlation
coefficient and low residual standard deviation. Thus, they
have been employed for the estimation of physical properties
of high OH containing glasses. The experimental values of
the properties of these glasses present a good tit with the
calculated mean values within 95o/c confidence interval. This
fact confirms the validity and utility of this IR spectroscopic
approach for the estimation of physical properties of calcium
metaphosphate glasses. |
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