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Amorphous SiBCO ceramics derived from novel polymeric precursors

Liebau, Verena and Hauser, Ralf and Riedel, Ralf (2004):
Amorphous SiBCO ceramics derived from novel polymeric precursors.
7, In: Comptes Rendus Chimie, (5), Elsevier Science Publishing, pp. 463-469, ISSN 16310748, DOI: 10.1016/j.crci.2003.11.012,
[Online-Edition: https://doi.org/10.1016/j.crci.2003.11.012],
[Article]

Abstract

New polymeric precursors suitable to form boron containing silicon oxycarbide glass were synthesized by the hydroboration reaction of 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane with borane dimethylsulphide. The obtained polymers denoted as poly(organoborosiloxanes) were characterized by elemental analysis, thermal gravimetric analysis in combination with in situ mass spectrometry (TG/MS), FT-IR and Raman spectroscopy. The polymer-to-ceramic transformation was achieved at 1100 °C in inert argon atmosphere yielding black and X-ray amorphous SiBCO ceramics thermally stable up to 1200 °C. At temperatures exceeding 1300 °C crystallization forming β-SiC was found along with decomposition of the SiBCO matrix. Crystalline silica phases were not formed during annealing of SiBCO up to 1500 °C. To cite this article: V. Liebau et al., C. R. Chimie 7 (2004).

Item Type: Article
Erschienen: 2004
Creators: Liebau, Verena and Hauser, Ralf and Riedel, Ralf
Title: Amorphous SiBCO ceramics derived from novel polymeric precursors
Language: English
Abstract:

New polymeric precursors suitable to form boron containing silicon oxycarbide glass were synthesized by the hydroboration reaction of 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane with borane dimethylsulphide. The obtained polymers denoted as poly(organoborosiloxanes) were characterized by elemental analysis, thermal gravimetric analysis in combination with in situ mass spectrometry (TG/MS), FT-IR and Raman spectroscopy. The polymer-to-ceramic transformation was achieved at 1100 °C in inert argon atmosphere yielding black and X-ray amorphous SiBCO ceramics thermally stable up to 1200 °C. At temperatures exceeding 1300 °C crystallization forming β-SiC was found along with decomposition of the SiBCO matrix. Crystalline silica phases were not formed during annealing of SiBCO up to 1500 °C. To cite this article: V. Liebau et al., C. R. Chimie 7 (2004).

Journal or Publication Title: Comptes Rendus Chimie
Volume: 7
Number: 5
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Hydroboration, Poly(borosiloxane), SiBCO ceramic
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 17 Dec 2018 11:58
DOI: 10.1016/j.crci.2003.11.012
Official URL: https://doi.org/10.1016/j.crci.2003.11.012
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