<報文>発光分光法による溶融Na珪酸塩の赤外線反射スペクトル

概要

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The infrared reflection spectra of a series of molten sodium silicates-Na_2O・xSiO_2 (x=4,3,2,1)-were measured over the frequency interval from 250 to 4000 cm^<-1> by means of emission spectrometry at temperature about 50℃ higher than liquidus. The reflection spectra obtained by emittance measurement are similar to the available data measured by reflection spectrometry. In order to obtain optical and dielectric constants, comparisons were carried out on the applicability of the Kramers-Kronig relation and the classical dispersion theory to the present results. After some preliminary calculations, it was concluded that the classical dispersion theory seemed to give better results than the Kramers-Kronig relation in the present case. The optical and dielectric constants, k (absorption coefficient), n (refractive index), ε' and ε" (real and imaginary parts of dielectric constant), were determined from the appropriate dispersion parameters which are able to reproduce the observed spectra.
東北大学の論文
1979-09-22