Effect of Ca and B incorporation into silicon oxycarbide on its microstructure and phase composition
Xie F, Gonzalo-Juan I, Breitzke H, Fasel C, Trapp M, Buntkowsky G, Kleebe HJ, Riedel R, Boccaccini AR, Ionescu E (2019)
Publication Type: Journal article
Publication year: 2019
Journal
DOI: 10.1111/jace.16620
Abstract
Ca- and/or B-modified silicon oxycarbides were synthesized via pyrolysis of suitable polysilsesquioxane-based single-source precursors. Their polymer-to-ceramic transformation was investigated with thermogravimetric analysis, coupled with in situ evolved gas analysis. The prepared silicon oxycarbides were investigated with respect to their crystallization behavior, network architecture, and chemical compositions. The network connectivity in silicon oxycarbides can be affected/tuned upon using two different “tools”: (a) first, the use of network modifiers, such as Ca in our study, leads to a slight depolymerization of the network via generation of a small amount of Q3 sites; (b) second, the modification of silicon oxycarbide with B/Ca leads to a decrease of the carbon content in the network and thus to a significant decrease of its connectivity. Using these two different effects, the network connectivity in silicon oxycarbides can be finely tuned.
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Germany (DE)How to cite
APA:
Xie, F., Gonzalo-Juan, I., Breitzke, H., Fasel, C., Trapp, M., Buntkowsky, G.,... Ionescu, E. (2019). Effect of Ca and B incorporation into silicon oxycarbide on its microstructure and phase composition. Journal of the American Ceramic Society. https://dx.doi.org/10.1111/jace.16620
MLA:
Xie, Fangtong, et al. "Effect of Ca and B incorporation into silicon oxycarbide on its microstructure and phase composition." Journal of the American Ceramic Society (2019).
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