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Raman spectroscopic characterization of binder systems for carbon-bonded filtersWednesday (07.10.2020) 13:20 - 13:40
A contribution to the production of zero-defect materials is the development of carbon-bonded alumina foam filters for removing nonmetallic inclusion from molten metals. In this work environmentfriendly binder systems for these filters based on a mixture of lactose and tannin with and without CarboresP were investigated by Raman spectroscopy. The size of sp2 carbon clusters was estimated using the intensity ratio of the D- and G-bands determined from Raman spectroscopy measurements.
Raman spectra of the pure substances lactose, tannin, CarboresP and mixtures thereof were recorded. Both in-situ measurements with the samples in a heating chamber and measurements on pre-annealed samples were performed. The carbon cluster sizes varying due to the heat treatment were obtained by the Raman measurements and then compared.
The Raman spectroscopy at high-temperatures was complemented by high-temperature X-ray diffraction.