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Structure of (ZrO2)(x)(SiO2)(1-x) xerogels (x=0.1, 0.2, 0.3 and 0.4) from FTIR, Si-29 and O-17 MAS NMR and EXAFS

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UNSPECIFIED (1999) Structure of (ZrO2)(x)(SiO2)(1-x) xerogels (x=0.1, 0.2, 0.3 and 0.4) from FTIR, Si-29 and O-17 MAS NMR and EXAFS. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1 (10). pp. 2527-2533. ISSN 1463-9076.

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Abstract

A combination of Si-29 and O-17 MAS NMR, EXAFS and FTIR spectroscopy has been used to study the atomic structure of(ZrO2)(x)(SiO2)(1-x) (x = 0.1, 0.2, 0.3 and 0.4) xerogels prepared by reacting partially hydrolysed tetraethyl orthosilicate with zirconium(rv) propoxide. Results from (ZrO2)(0.1)(SiO2)(0.9) samples reveal the oxides to be atomically mixed with no evidence of phase separation. In these samples, the nearest neighbour environment of zirconium is similar to that found in cubic zirconia. In the (ZrO2)(0.4)(SiO2)(0.6) samples, phase separation occurs with a significant proportion of the zirconium present as amorphous ZrO2 with a local structure similar to that of monoclinic zirconia. O-17 MAS NMR and EXAFS have proven valuable techniques for gauging the level of atomic mixing in these materials.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Q Science > QC Physics
Journal or Publication Title: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Publisher: ROYAL SOC CHEMISTRY
ISSN: 1463-9076
Official Date: 15 May 1999
Dates:
DateEvent
15 May 1999UNSPECIFIED
Volume: 1
Number: 10
Number of Pages: 7
Page Range: pp. 2527-2533
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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