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Structure,energetics and bioactivity of silicon oxycarbide-based amorphous ceramics with highly connected networks |
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| Authors: | Emanuel Ionescu Sabyasachi Sen Gabriela Mera Alexandra Navrotsky |
| Affiliation: | 1. Institute for Materials Science, Technische Universität Darmstadt, Jovanka-Bontschits-Strasse 2, D-64287 Darmstadt, Germany;2. Department of Chemical Engineering and Materials Science, University of California, Davis, USA;3. Peter A Rock Thermochemistry Laboratory and NEAT ORU, University of California, Davis, CA 95616, USA |
| Abstract: | Mg and Ca substituted silicon oxycarbides are investigated with respect to their network architecture, enthalpy of formation and bioactivity. The synthesized materials have highly connected structural network with an open architecture and a minor but critical fraction of depolymerized Q-species. This combination of structural features allows for providing bioactivity at the same time with enhanced thermo-mechanical robustness and crystallization resistance. It is argued that silicon oxycarbide amorphous ceramics may consequently serve as model compounds for developing rational design concepts for advanced bioactive glasses. |
| Keywords: | Bioactive glasses Polymer-derived ceramics Silicon oxycarbides Network architecture Network connectivity |
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