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

Toma, Liviu and Kleebe, Hans-Joachim and Müller, Mathis M. and Janssen, Enrico and Riedel, Ralf and Melz, Tobias and Hanselka, Holger and 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) pp. 1056-1061. ISSN 00027820
[Article] , (2012)

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

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.

Item Type: Article
Erschienen: 2012
Creators: Toma, Liviu and Kleebe, Hans-Joachim and Müller, Mathis M. and Janssen, Enrico and Riedel, Ralf and Melz, Tobias and Hanselka, Holger and Colombo, P.
Title: Correlation Between Intrinsic Microstructure and Piezoresistivity in a SiOC Polymer-Derived Ceramic
Language: English
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.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 95
Number: 3
Publisher: Wiley VCH, Weinheim, Germany
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
Date Deposited: 18 Dec 2018 11:33
DOI: 10.1111/j.1551-2916.2011.04944.x
Official URL: https://doi.org/10.1111/j.1551-2916.2011.04944.x
Funders: 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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