TY  - JOUR
AU  - Deibert, Wendelin
AU  - Stournari, Vasiliki
AU  - Ivanova, Mariya E.
AU  - Escolástico, Sonia
AU  - Serra, José M.
AU  - Malzbender, Jürgen
AU  - Beck, Tilmann
AU  - Singheiser, Lorenz
AU  - Guillon, Olivier
AU  - Meulenberg, Wilhelm A.
TI  - Effect of microstructure on electrical and mechanical properties of La 5.4 WO 12-δ proton conductor
JO  - Journal of the European Ceramic Society
VL  - 38
IS  - 10
SN  - 0955-2219
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2018-03787
SP  - 3527 - 3538
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000432768900016
DO  - DOI:10.1016/j.jeurceramsoc.2018.04.009
UR  - https://juser.fz-juelich.de/record/849646
ER  -