Xie, Fangtong ; Gonzalo-Juan, Isabel ; Breitzke, Hergen ; Fasel, Claudia ; Trapp, Maximilian ; Buntkowsky, Gerd ; Kleebe, Hans-Joachim ; Riedel, Ralf ; Boccaccini, Aldo R. ; Ionescu, Emanuel (2019)
Effect of Ca and B incorporation into silicon oxycarbide on its microstructure and phase composition.
In: Journal of the American Ceramic Society, 102 (12)
doi: 10.1111/jace.16620
Article, Bibliographie
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”: (i) firstly, 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; (ii) secondly, 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. By using these two different effects, the network connectivity in silicon oxycarbides can be finely tuned.
| Item Type: | Article |
|---|---|
| Erschienen: | 2019 |
| Creators: | Xie, Fangtong ; Gonzalo-Juan, Isabel ; Breitzke, Hergen ; Fasel, Claudia ; Trapp, Maximilian ; Buntkowsky, Gerd ; Kleebe, Hans-Joachim ; Riedel, Ralf ; Boccaccini, Aldo R. ; Ionescu, Emanuel |
| Type of entry: | Bibliographie |
| Title: | Effect of Ca and B incorporation into silicon oxycarbide on its microstructure and phase composition |
| Language: | English |
| Date: | December 2019 |
| Publisher: | Wiley-VCH |
| Journal or Publication Title: | Journal of the American Ceramic Society |
| Volume of the journal: | 102 |
| Issue Number: | 12 |
| DOI: | 10.1111/jace.16620 |
| URL / URN: | https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.16... |
| 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”: (i) firstly, 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; (ii) secondly, 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. By using these two different effects, the network connectivity in silicon oxycarbides can be finely tuned. |
| Uncontrolled Keywords: | Network connectivity, silicon oxycarbides, SiOC |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Earth Science 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids 07 Department of Chemistry 07 Department of Chemistry > Eduard Zintl-Institut > Physical Chemistry |
| Date Deposited: | 12 Jun 2019 05:43 |
| Last Modified: | 18 Aug 2021 11:28 |
| PPN: | |
| Projects: | German Science Foundation (DFG), project number 317658328, EU COST Action Smart Inorganic Polymers (CM 1302), German Science Foundation (DFG), IO 64/14-1 |
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