Wang, Xifan ; Mera, Gabriela ; Morita, Koji ; Ionescu, Emanuel (2016)
Synthesis of polymer-derived graphene/silicon nitride-based nanocomposites with tunable dielectric properties.
In: Journal of the Ceramic Society of Japan, 124 (10)
doi: 10.2109/jcersj2.16089
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Within the present work, reduced-graphene oxide (rGO)/silicon nitride (Si3N4) nanocomposites were prepared upon pyrolysis of a graphene oxide (GO)-filled polysilazane. The novel preparative approach consists in the synthesis of the polysilazane in the presence of different concentrations of GO, yielding a homogeneous GO/polysilazane composite which was subsequently thermally converted in Ar atmosphere into rGO/Si3N4 nanocomposites. Hot-pressing of the obtained nanocomposite powders delivered monolithic rGO/Si3N4. All prepared samples exhibited the presence of homogeneously dispersed rGO phase within an amorphous or crystalline silicon nitride matrix, as for the as-prepared and hot-pressed samples, respectively. An increasing amount of rGO in the nanocomposites was found to gradually suppress the crystallization of the silicon nitride matrix into α-Si3N4. Moreover, depending on the volume fraction of the graphene phase in the ceramic nanocomposites, different dielectric properties were observed, indicating a facile preparative method to produce materials with tunable electromagnetic waves (EMW) behavior.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Wang, Xifan ; Mera, Gabriela ; Morita, Koji ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Synthesis of polymer-derived graphene/silicon nitride-based nanocomposites with tunable dielectric properties |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Oktober 2016 |
| Verlag: | The Ceramic Society of Japan |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the Ceramic Society of Japan |
| Jahrgang/Volume einer Zeitschrift: | 124 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.2109/jcersj2.16089 |
| Kurzbeschreibung (Abstract): | Within the present work, reduced-graphene oxide (rGO)/silicon nitride (Si3N4) nanocomposites were prepared upon pyrolysis of a graphene oxide (GO)-filled polysilazane. The novel preparative approach consists in the synthesis of the polysilazane in the presence of different concentrations of GO, yielding a homogeneous GO/polysilazane composite which was subsequently thermally converted in Ar atmosphere into rGO/Si3N4 nanocomposites. Hot-pressing of the obtained nanocomposite powders delivered monolithic rGO/Si3N4. All prepared samples exhibited the presence of homogeneously dispersed rGO phase within an amorphous or crystalline silicon nitride matrix, as for the as-prepared and hot-pressed samples, respectively. An increasing amount of rGO in the nanocomposites was found to gradually suppress the crystallization of the silicon nitride matrix into α-Si3N4. Moreover, depending on the volume fraction of the graphene phase in the ceramic nanocomposites, different dielectric properties were observed, indicating a facile preparative method to produce materials with tunable electromagnetic waves (EMW) behavior. |
| Freie Schlagworte: | Silicon nitride, Reduced graphene oxide (rGO), rGO/Si3N4, Polymer-derived ceramic nanocomposites, Dielectric properties |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 04 Jan 2017 09:09 |
| Letzte Änderung: | 04 Jan 2019 11:54 |
| PPN: | |
| Sponsoren: | The authors acknowledge the financial support from European Commission through the Marie-Curie ITN project “ Functional Nitrides for Energy Applications, FUNEA ” (FP7-PITN-GA-2010- 264873), The authors acknowledge the financial support from the R&D Convergence Program of MSIP (Ministry of Science, ICT and Future Planning) and NST (National Research Council of Science & Technology) of Republic of Korea (Grant: CMIP-13-4-KIMS)., Also funding within the frame of a Joint Research Project between Japan (JSPS - Japan Society for the Promotion of Science) and Germany (DAAD - German Academic Exchange Service) is gratefully acknowledged. |
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