TU Darmstadt / ULB / TUbiblio

Thermal decomposition of carbon-rich polymer-derived silicon carbonitrides leading to ceramics with high specific surface area and tunable micro- and mesoporosity

Prasad, Ravi Mohan ; Mera, Gabriela ; Morita, Koji ; Müller, Mathis M. ; Kleebe, Hans-Joachim ; Gurlo, Aleksander ; Fasel, Claudia ; Riedel, Ralf (2012):
Thermal decomposition of carbon-rich polymer-derived silicon carbonitrides leading to ceramics with high specific surface area and tunable micro- and mesoporosity.
In: Journal of the European Ceramic Society, 32 (2), pp. 477-484. Elsevier, ISSN 0955-2219,
DOI: 10.1016/j.jeurceramsoc.2011.08.020,
[Article]

Abstract

Herein we report on the thermal decomposition of SiCN polymer-derived ceramics leading to materials with high specific surface area and defined pore sizes. The ceramics were obtained by means of pyrolysis of a carbon-rich poly(diphenylsilylcarbodiimide) precursor and by varying the thermolysis parameters, namely temperature, annealing time and using additional annealing steps. The thermal decomposition of SiCN ceramics is correlated with the carbothermal reaction of amorphous silicon nitride phase with excess carbon and this detrimental event leads to high specific surface area up to 568 m2 g−1 and micro- and mesopores formation in these materials. High-resolution TEM investigations have confirmed that the pores are embedded only in the carbon phase. Moreover, the relationship between the pore sizes and the organization of free carbon phase is discussed.

Item Type: Article
Erschienen: 2012
Creators: Prasad, Ravi Mohan ; Mera, Gabriela ; Morita, Koji ; Müller, Mathis M. ; Kleebe, Hans-Joachim ; Gurlo, Aleksander ; Fasel, Claudia ; Riedel, Ralf
Title: Thermal decomposition of carbon-rich polymer-derived silicon carbonitrides leading to ceramics with high specific surface area and tunable micro- and mesoporosity
Language: English
Abstract:

Herein we report on the thermal decomposition of SiCN polymer-derived ceramics leading to materials with high specific surface area and defined pore sizes. The ceramics were obtained by means of pyrolysis of a carbon-rich poly(diphenylsilylcarbodiimide) precursor and by varying the thermolysis parameters, namely temperature, annealing time and using additional annealing steps. The thermal decomposition of SiCN ceramics is correlated with the carbothermal reaction of amorphous silicon nitride phase with excess carbon and this detrimental event leads to high specific surface area up to 568 m2 g−1 and micro- and mesopores formation in these materials. High-resolution TEM investigations have confirmed that the pores are embedded only in the carbon phase. Moreover, the relationship between the pore sizes and the organization of free carbon phase is discussed.

Journal or Publication Title: Journal of the European Ceramic Society
Journal volume: 32
Number: 2
Publisher: Elsevier
Uncontrolled Keywords: Precursor-organic, Electron microscopy, Microstructure-final, Porosity, Carbon-rich polymer-derived SiCN ceramic
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: 02 Apr 2012 09:26
DOI: 10.1016/j.jeurceramsoc.2011.08.020
Official URL: https://www.sciencedirect.com/science/article/pii/S095522191...
Funders: DFG, priority program SPP 1299, LOEWE-Zentrum AdRIA (Adaptronik—Research, Innovation, Application), funded by the state of Hesse, Germany
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details