Sol-gel derived silicon nitride powders

The sol-gel synthesis of silicon nitride powders has been studied. The precursor gels were prepared from a colloidal dispersion of silicon dioxide and sucrose, with mole ratios of reactants, C/SiO sub 2 , ranging from 2 to 4. The carboreduction and nitridation processes were performed at temperature...

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Published in:Journal of the Serbian Chemical Society 1999-01, Vol.64 (4), p.285-295
Main Authors: Cerovic, L, Milonjic, S K, Zec, S, Bahloul-Hourlier, D
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creator Cerovic, L
Milonjic, S K
Zec, S
Bahloul-Hourlier, D
description The sol-gel synthesis of silicon nitride powders has been studied. The precursor gels were prepared from a colloidal dispersion of silicon dioxide and sucrose, with mole ratios of reactants, C/SiO sub 2 , ranging from 2 to 4. The carboreduction and nitridation processes were performed at temperatures between 1400-1550 deg C under a dynamic nitrogen atmosphere, with a 4 h hold. The optimum C/SiO sub 2 ratio and temperature for preparation of the Si sub 3 N sub 4 powders were selected. For the SiO sub 2 -C-N sub 2 system examined, the boundary temperature between Si sub 3 N sub 4 and SiC formation was established, in relation to the amount of carbon introduced.
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title Sol-gel derived silicon nitride powders
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