Boron environments and irradiation stability of iron borophosphate glasses analysed by EELS
The coordination and stability under electron irradiation of boron in glasses with nominal molar composition 60P 2O 5 − (40 − x)Fe 2O 3 − xB 2O 3, 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 micro...
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Published in | Solid state sciences Vol. 10; no. 9; pp. 1194 - 1199 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Paris
Elsevier Masson SAS
01.09.2008
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The coordination and stability under electron irradiation of boron in glasses with nominal molar composition 60P
2O
5
−
(40
−
x)Fe
2O
3
−
xB
2O
3, 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 BO
4 units; there is no evidence of any trigonal BO
3 units. TEM analysis reveals no tendency for sub-micron phase separation of the as-annealed glass. Iron borophosphate glasses 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 BO
4 to BO
3 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.
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1293-2558 1873-3085 |
DOI: | 10.1016/j.solidstatesciences.2007.11.024 |