Boron environments and irradiation stability of iron borophosphate glasses analysed by EELS

BINGHAM, Paul, YANG, G., HAND, R.J. and MÖBUS, G. (2008). Boron environments and irradiation stability of iron borophosphate glasses analysed by EELS. Solid State Sciences, 10 (9), 1194-1199.

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Link to published version:: 10.1016/j.solidstatesciences.2007.11.024

Abstract

The coordination and stability under electron irradiation of boron in glasses with nominal molar composition 60P2O5 − (40 − x)Fe2O3 − xB2O3, for which x = 0, 5, 10, 15 and 20, have been investigated for the first time by electron energy loss spectroscopy (EELS) with transmission electron microscopy (TEM). Analyses confirm that boron is present in un-irradiated samples as tetrahedral BO4 units; there is no evidence of any trigonal BO3 units. TEM analysis reveals no tendency for sub-micron phase separation of the as-annealed glass. Ironborophosphateglasses exhibit high resistance to structural damage by electron beam irradiation by comparison with literature values for a range of other silicate and phosphate glasses. Large doses of highly intense irradiation result in the conversion of BO4 to BO3 units. The high irradiation resistance of these glasses could be related to the absence of mobile classical network modifiers such as alkalis and their associated non-bridging oxygens.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1016/j.solidstatesciences.2007.11.024
Depositing User: Helen Garner
Date Deposited: 11 Apr 2012 15:53
Last Modified: 11 Apr 2012 15:53
URI: http://shura.shu.ac.uk/id/eprint/4963

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