Cambridge 7th to 9th September
Presenting Author:
Faiz Mohd-Noor
<F.Mohd-Noor@warwick.ac.uk>
article posted 15 Mar 2015
FaizMohd-Noor
Faiz is a PhD student at the University of Warwick, working with Dr Diane Holland, Dr Emma Barney (Nottingham), and Professor Alex Hannon(ISIS STFC). He received his Bachelor's Degree in Health Physics and Master's Degree in Laser Physics from Universiti Teknologi Malaysia.
Isotope Substitution Neutron Diffraction Study of the
Lithium and Tellurium Environments in Binary Li2O-TeO2 Glasses
F. Mohd-Noor1*, D. Holland1*, A. C. Hannon2, E. R. Barney3
Isotope substitution neutron diffraction has been used to study binary TeO2
glasses modified with 10 to 30 mol% of Li2O. Use of the null-scattering
isotope composition of lithium combined with difference experiments using
the natural lithium isotope allowed determination of the tellurium-oxygen
and lithium-oxygen coordinations, nTeO and nLiO,
as a function of glass
composition. The value of nLiO remains constant at approximately 4.0 over
the entire composition range whilst the average value of nTeO remains
constant at 3.66(7) until x = 15 mol% before decreasing linearly as more
modifier is added. This is in accord with the recent model of alkali tellurite
glasses in which the Te coordination change is explained by the presence
of terminal oxygens in amorphous TeO2.
Institutions:
1 Physics Department, University of Warwick, Coventry CV4 7AL, United Kingdom.
2 ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom.
3 Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom.