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@ARTICLE{Zhang:454441,
author = {Zhang, Zhaoming and Spiers, Kathryn and Vance, Eric R. and
Davis, Joel},
title = {{P}artitioning of {C}e, as a simulant for {P}u, in a
multiphase ceramic nuclear waste form},
journal = {Journal of the American Ceramic Society},
volume = {103},
number = {10},
issn = {1551-2916},
address = {Westerville, Ohio},
publisher = {Soc.},
reportid = {PUBDB-2021-00515},
pages = {5515 - 5524},
year = {2020},
note = {Waiting for fulltext},
abstract = {A pyrochlore‐rich multiphase ceramic waste form was
prepared by the alkoxide‐route and consolidated by
sintering in air. Cerium (Ce) was used as a surrogate for
plutonium (Pu), which was found in both the major pyrochlore
and minor perovskite phases, but not the minor rutile phase.
A synchrotron‐based fluorescence X‐ray absorption
near‐edge spectroscopy (XANES) imaging technique was
employed to determine the Ce oxidation state in each of the
two Ce‐containing phases. It was shown that the major
pyrochlore phase contains only tetravalent Ce, whereas the
minor perovskite phase incorporates exclusively trivalent
Ce. The effect of sintering atmosphere was also
investigated, which revealed a very different phase
assemblage when sintered in argon (Ar). A major perovskite
phase was produced under Ar with a minor zirconolite‐4M
phase, both containing trivalent Ce. The composition of the
minor rutile phase remained the same whether it was sintered
in air or Ar. The results demonstrate the importance of
controlling the oxidation state of multivalent waste ions in
the design of ceramic waste forms.},
cin = {FS-PET-S},
ddc = {660},
cid = {I:(DE-H253)FS-PET-S-20190712},
pnm = {6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621)},
pid = {G:(DE-HGF)POF3-6213},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000538886700001},
doi = {10.1111/jace.17277},
url = {https://bib-pubdb1.desy.de/record/454441},
}