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@ARTICLE{Deibert:849646,
author = {Deibert, Wendelin and Stournari, Vasiliki and Ivanova,
Mariya E. and Escolástico, Sonia and Serra, José M. and
Malzbender, Jürgen and Beck, Tilmann and Singheiser, Lorenz
and Guillon, Olivier and Meulenberg, Wilhelm A.},
title = {{E}ffect of microstructure on electrical and mechanical
properties of {L}a 5.4 {WO} 12-δ proton conductor},
journal = {Journal of the European Ceramic Society},
volume = {38},
number = {10},
issn = {0955-2219},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2018-03787},
pages = {3527 - 3538},
year = {2018},
abstract = {The relationships between microstructural characteristics
and electrical as well as mechanical properties of
La5.4WO12-δ (LWO54) materials were studied. Polycrystalline
LWO54 samples revealed identical transport mechanisms
regardless of the sample microstructure. The studied samples
show predominately proton conductor behaviour below
800 °C and become predominant n-type and oxygen ion
conductors above this temperature. The magnitude of the
total conductivity is enhanced with larger grain size and
lower porosity. Young’s modulus decreased by $20\%$ with
increasing temperature up to 1000 °C regardless of grain
size and atmosphere. Fracture strength was determined via
ring-on-ring bending tests, yielding values that strongly
depended on microstructural characteristics and homogeneity
of the microstructure. Elevated temperature deformation
studies revealed that creep is governed by cation diffusion
mechanism.},
cin = {IEK-1 / IEK-2},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IEK-2-20101013},
pnm = {111 - Efficient and Flexible Power Plants (POF3-111)},
pid = {G:(DE-HGF)POF3-111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000432768900016},
doi = {10.1016/j.jeurceramsoc.2018.04.009},
url = {https://juser.fz-juelich.de/record/849646},
}