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@ARTICLE{Fantin:862888,
author = {Fantin, Andrea and Scherb, Tobias and Seeger, Janka and
Schumacher, Gerhard and Gerhards, Uta and Ivanova, Mariya E.
and Meulenberg, Wilhelm A. and Dittmeyer, Roland and
Banhart, John},
title = {{R}elation between composition and vacant oxygen sites in
the mixed ionic-electronic conductors {L}a 5.4 {W} 1−y {M}
y {O} 12−δ ( {M} = {M}o, {R}e; 0 ≤ y ≤ 0.2) and their
mother compound {L}a 6−x {WO} 12−δ (0.4 ≤ x ≤ 0.8)},
journal = {Solid state ionics},
volume = {306},
issn = {0167-2738},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2019-03071},
pages = {104 - 111},
year = {2017},
abstract = {A detailed analysis of specimen composition, water uptake
and their interrelationship in the systems
La6-xWO12-δ(0.4≤x≤0.8) and
La6-xW1-yMyO12-δ(0≤y≤0.2;M= Mo, Re) is presented. The
three specimen series wereinvestigated in dry and wet (D2O)
conditions. A systematic trend in mass loss and onset
temperature variationwas observed in
La6-xWO12-δ(0.4≤x≤0.8). Even very small amounts (< 1
$wt\%)$ of secondary phases werefound to notably modify the
specimen's water uptake and onset temperature of mass loss.
The theoretical modelfor vacancy concentration available was
used to calculate the vacant oxygen sites starting from mass
loss valuesdetermined by thermogravimetry. A discrepancy
between the calculated and observed concentration of
vacantoxygen sites is observed for all three systems. The
effect of substitution of W by Re or Mo on the vacancy
amountis explained taking into account diffraction
measurements and information on the oxidation state of
thesubstituting elements Mo and Re.},
cin = {IEK-1},
ddc = {530},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000406736300016},
doi = {10.1016/j.ssi.2017.04.005},
url = {https://juser.fz-juelich.de/record/862888},
}