Structural role of zirconium in SiO2-ZrO2 gels: evidence from 17O NMR

Structural role of zirconium in SiO2-ZrO2 gels: evidence from 17O NMR

17O MAS NMR was applied to SiO2-ZrO2 mixed alkoxide derived gels. It demonstrated unambiguously that Zr-O-Si bonds are formed during gelling and that there was almost complete solid solution of Zr into the SiO2 network. Preliminary results on a ternary SiO2-TiO2-ZrO2 gel clearly indicate that Ti and...

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Veröffentlicht in:Journal of materials chemistry 1995, Vol.5 (8), p.1261-1263
Hauptverfasser: DIRKEN, P. J, RAY DUPREE, SMITH, M. E
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
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Zusammenfassung:17O MAS NMR was applied to SiO2-ZrO2 mixed alkoxide derived gels. It demonstrated unambiguously that Zr-O-Si bonds are formed during gelling and that there was almost complete solid solution of Zr into the SiO2 network. Preliminary results on a ternary SiO2-TiO2-ZrO2 gel clearly indicate that Ti and Zr have different chemical behaviour in these systems. 16 refs.
ISSN:0959-9428
1364-5501