The effect of copolymerization of tetraethylorthosilicate and aluminum hydroxonitrates

Authors
Eliseev, AA Kalinin, SV Privalov, VI Vertegel, AA Tretyakov, YD
Citation
Aa. Eliseev et al., The effect of copolymerization of tetraethylorthosilicate and aluminum hydroxonitrates, J SOL ST CH, 147(1), 1999, pp. 304-308
Citations number
20
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF SOLID STATE CHEMISTRY
ISSN journal
00224596 → ACNP
Volume
147
Issue
1
Year of publication
1999
Pages
304 - 308
Database
ISI
SICI code
0022-4596(199910)147:1<304:TEOCOT>2.0.ZU;2-P
Abstract
Polymerization of tetraethylorthosilicate (TEOS) in the presence of aqueous solutions of aluminum hydroxonitrates (Al(OH)(x)(NO3)(3-x) (0 < x < 2.5) w as investigated by means of optical spectrophotometry and Al-27 NMR. It was shown that gelation rate increases drastically in the system with x > 2, T he effect is due to copolycondensation of aluminum hydroxocomplexes and TEO S. Aluminum species entering copolymerization reaction have proved to conta in tetrahedrally coordinated aluminum. The effect discovered might be usefu l for the preparation of certain metal oxide-silica composites or silicate materials, such as mullite.