Please use this identifier to cite or link to this item: doi:10.22028/D291-24497
Title: Chemical routes to nanostructured ceramics and composites
Author(s): Schmidt, Helmut K.
Language: English
Year of Publication: 1995
OPUS Source: Applications of organometallic chemistry in the preparation and processing of advanced materials / ed. by John F. Harrod ... - Dordrecht [u.a.] : Kluwer, 1995. — (NATO ASI series / E ; 297), S. 47-67
SWD key words: Nanostruktur
Keramik
Sol-Gel-Verfahren
Chemische Synthese
Glas
Kolloidchemie
Ausgangsmaterial
Hydrolyse
Kondensation
DDC notations: 620 Engineering and machine engineering
Publikation type: Part of Conference Proceedings
Abstract: The sol-gel process represents a chemical synthesis route to fabricate oxidic materials like glasses and ceramics. It is characterized that molecular, oligomeric or colloidal systems can be used as precursors. The synthesis reaction is mainly based on a hydrolysis and condensation reaction. Through the condensation reaction metal oxygen metal bonds are formed leading to a three-dimensional network. While in silica systems in the majority of the cases under acid catalysis a more or less polymeric type of network is built up, in most other cases like alumina, titania, zirconia the first condensation step leads to colloidal systems which may be amorphous or partially crystalline like in titania. The gel formation takes place by aggregation of colloidal particles or further growth of polymer networks.
Link to this record: urn:nbn:de:bsz:291-scidok-28075
hdl:20.500.11880/24553
http://dx.doi.org/10.22028/D291-24497
ISBN: 0-7923-3677-1
Date of registration: 24-Mar-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
Collections:INM
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