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Correlation Between Intrinsic Microstructure and Piezoresistivity in a SiOC Polymer-Derived Ceramic

Toma, Liviu ; Kleebe, Hans-Joachim ; Müller, Mathis M. ; Janssen, Enrico ; Riedel, Ralf ; Melz, Tobias ; Hanselka, Holger ; Colombo, P. :
Correlation Between Intrinsic Microstructure and Piezoresistivity in a SiOC Polymer-Derived Ceramic.
[Online-Edition: https://doi.org/10.1111/j.1551-2916.2011.04944.x]
In: Journal of the American Ceramic Society, 95 (3) S. 1056-1061. ISSN 00027820
[Artikel] , (2012)

Offizielle URL: https://doi.org/10.1111/j.1551-2916.2011.04944.x

Kurzbeschreibung (Abstract)

Transmission electron microscopy was performed on a carbon‐containing SiOC material derived from a polymer precursor pyrolyzed at 1100°C and subsequently annealed at 1400°C. The TEM study focused on the correlation between micro/nanostructure evolution and the piezoresistivity monitored on the annealed sample. Upon pyrolysis, the material was completely amorphous with no local crystallization of the thermodynamically stable phases. Upon annealing, however, the formation of turbostratic carbon and SiC was observed. Unexpectedly, crystallization only occurred within intrinsic pores while the bulk of the sample remained amorphous. As the nanopores formed a percolation network throughout the entire material, the piezoresistive effect is predominantly a consequence of turbostratic carbon formation inside the residual porosity.

Typ des Eintrags: Artikel
Erschienen: 2012
Autor(en): Toma, Liviu ; Kleebe, Hans-Joachim ; Müller, Mathis M. ; Janssen, Enrico ; Riedel, Ralf ; Melz, Tobias ; Hanselka, Holger ; Colombo, P.
Titel: Correlation Between Intrinsic Microstructure and Piezoresistivity in a SiOC Polymer-Derived Ceramic
Sprache: Englisch
Kurzbeschreibung (Abstract):

Transmission electron microscopy was performed on a carbon‐containing SiOC material derived from a polymer precursor pyrolyzed at 1100°C and subsequently annealed at 1400°C. The TEM study focused on the correlation between micro/nanostructure evolution and the piezoresistivity monitored on the annealed sample. Upon pyrolysis, the material was completely amorphous with no local crystallization of the thermodynamically stable phases. Upon annealing, however, the formation of turbostratic carbon and SiC was observed. Unexpectedly, crystallization only occurred within intrinsic pores while the bulk of the sample remained amorphous. As the nanopores formed a percolation network throughout the entire material, the piezoresistive effect is predominantly a consequence of turbostratic carbon formation inside the residual porosity.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the American Ceramic Society
Band: 95
(Heft-)Nummer: 3
Verlag: Wiley VCH, Weinheim, Germany
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe
Hinterlegungsdatum: 18 Dez 2018 11:33
DOI: 10.1111/j.1551-2916.2011.04944.x
Offizielle URL: https://doi.org/10.1111/j.1551-2916.2011.04944.x
Sponsoren: The work reported here is part of the Priority Program “Nanoscaled Inorganic Materials by Molecular Design: New Materials for Advanced Technologies” (DFG‐SPP 1181) funded by the Deutsche Forschungsgemeinschaft, Bonn, Germany., R. R. also thanks the Fonds der Chemischen Industrie, Frankfurt, Germany, for financial support.
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