Role of titanium in TiO2:SiO2 sol-gels: An x-ray diffraction study

Rigden, J.S. and Newport, R.J. and Smith, M.E. and Dirken, P.J. and Bushnell-Wye, G. (1995) Role of titanium in TiO2:SiO2 sol-gels: An x-ray diffraction study. In: 2nd International Conference on Materials Chemistry (MC2), July 1995, Kent, England. (Access to this publication is restricted)

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Abstract

Transmission X-ray diffraction has been used to study a series of powdered silica:titania sol-gel glasses with titania contents ranging from a 'pure' silica sample through to high titania levels where phase separation is predicted to occur. Analysis of the data reveals a change in second- and: third-neighbour coordination numbers with increasing Ti content and confirms that for low titanium contents the sol-gels are atomically mixed. The lower titanium content sol-gels have also been studied as spun thin films using shallow-angle X-ray diffraction. Comparison with the transmission studies shows an increase in disorder in the silica network when the material is in the form of a coating rather than in the bulk. An increase in the nun;ber of Si-O-H bonds is also suggested.

Item Type: Conference or workshop item (Paper)
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: J.M. Smith
Date Deposited: 29 Apr 2009 13:59
Last Modified: 09 May 2012 09:31
Resource URI: http://kar.kent.ac.uk/id/eprint/15974 (The current URI for this page, for reference purposes)
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