Identification Method For Infrared Absorption Spectra Of Semitransparent Media By Their Emission Data Application To Lime-Aluminosilicate Glasses At High Temperatures

The infrared absorption spectra of four lime-aluminosilicate glasses have been studied at high temperatures in the spectral range 1 to 5um. The glass composition varies essentially by the FeO content. The effect of temperature is pointed out up to 1450 deg C. The emission spectrometry technique used is applied to thin slabs of semitransparent materials heated in plane-parallel platinum crucibles exposed to strong temperature gradients. A modeling of the combined conductive/radiative heat transfer is performed in a glass wall.