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@ARTICLE{Shiratori:49227,
author = {Shiratori, Yu. and Tietz, F. and Penkalla, H.-J. and He, J.
Q. and Shiratori, Yo. and Stöver, D.},
title = {{I}nfluence of impurities on the conductivity of composites
in the system (3{YSZ})1-x-({M}g{O})x},
journal = {Journal of power sources},
volume = {148},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-49227},
pages = {32 - 42},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {(3YSZ)(1-x)-(MgO)(x) form composites above x = 0.15, which
consist of stabilized-zirconia and magnesia. Electrical
conductivities of the two-phase composites were measured by
the four-probe DC technique. Negative influences of
impurities such as SiO2 on the conductivity are discussed
with the aid of microstructural investigations using SEM and
TEM. In the investigated composites, the impurities do not
directly affect the electrical conduction as current
blockers at grain boundaries as usually observed in pure YSZ
electrolytes. Microstructural investigation using HRTEM
revealed that grain boundaries of the stabilized zirconia
are very clean because the silicon and aluminum oxide
impurities react with MgO to form discrete Mg2SiO4 and
MgAl2O4 grains in the electrolytes, respectively. A
theoretical approach taking into consideration continuous
volumes of existing phases reveals that the conductivity of
the two-phase composites depends on the phase continuity.
The reduction of the continuity of the zirconia phase is the
main reason for the decrease of conductivity in the present
system. (c) 2005 Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {IFF-IEM / IWV-1 / IWV-2},
ddc = {620},
cid = {I:(DE-Juel1)VDB321 / I:(DE-Juel1)VDB5 / I:(DE-Juel1)VDB2},
pnm = {Brennstoffzelle / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602)},
pid = {G:(DE-Juel1)FUEK246 / G:(DE-Juel1)SOFC-20140602},
shelfmark = {Electrochemistry / Energy $\&$ Fuels},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000232743600005},
doi = {10.1016/j.jpowsour.2005.01.036},
url = {https://juser.fz-juelich.de/record/49227},
}