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A Novel Route to Aluminum Nitride Ceramics Using a Polyaminoalane Precursor

Published online by Cambridge University Press:  25 February 2011

M. Seibold
Affiliation:
now with: MAN Technologie GmbH, D- 8000 München, Federal Republik of Germany
C. Rüssel
Affiliation:
Institut für Werkstoffwissenschaften III (Glas und Keramik), Universität Erlangen-Nürnberg, Martensstrasse 5, D-8520 Erlangen, Federal Republik of Germany
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Abstract

Metallic Aluminum is dissolved anodically in an electrolyte, containing a primary amine, an aprotic solvent and a tetraalkylammonium salt. Removal of the solvent and subsequent heating lead to a polymer network. Initial drying causes a more viscous liquid, further drying up to 150°C accelerates the polymerization process and a gel-like consistency is obtained. Pyrolysis is carried out under NH3 or inert gas atmosphere. X-ray diffraction data show amorphous products up to 800°C, treatment above 800°C leads to the desired ceramic product aluminum nitride. Peak broadening indicates extremely small crystallite sizes. Pressureless sintering without additives gives a compact product, having densities up to nearly 100% of the theoretical density.

Type
Research Article
Copyright
Copyright © Materials Research Society 1988

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References

LITERATURE

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