Diffusion of the hydroxide-ion in liquid CaO-Al2O3-slags by application of Fourier-Transform-lnfrared-Spectroscopy |
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Authors: | Gabriele Leekes Norbert Nowack Franz SchlegelmiIch |
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Abstract: | Water vapour is soluted in liquid CaO-Al2O3-slags as OH?-ion. To determine the diffusion coefficient a capillary technique is used. Roughly 5 cm long platinum capillaries filled with liquid slag are equilibrated at 1500 and 1600 °C and bar different times and then are quenched in liquid D2O. By dividing these capillaries into roughly 3 mm long segments enough sample substance is won to obtain FT-IR spectra of the OH-band. From measurement of the integral extinction of the OH-band and OH?-concentration profile through the capillary is obtained. FT-IR-spectroscopy is very suitable for this capillary technique because it needs only very little sample substance. |
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