Pickup, David M. and Mountjoy, Gavin and Wallidge, Graham and Newport, Robert J. and Smith, Mark E. (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. (Full text available)
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.
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group|
|Depositing User:||J.M. Smith|
|Date Deposited:||11 May 2009 11:14|
|Last Modified:||02 Jun 2014 13:11|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/15956 (The current URI for this page, for reference purposes)|