TY  - JOUR
AU  - Fedeli, Paolo
AU  - Drago, Francesca
AU  - Schulze-Küppers, Falk
AU  - Baumann, Stefan
TI  - Asymmetric LSCF Membranes Utilizing Commercial Powders
JO  - Materials
VL  - 13
IS  - 3
SN  - 1996-1944
CY  - Basel
PB  - MDPI
M1  - FZJ-2020-00712
SP  - 614
PY  - 2020
AB  - Powders of constant morphology and quality are indispensable for reproducible ceramic manufacturing. In this study, commercially available powders were characterized regarding their microstructural properties and screened for a reproducible membrane manufacturing process, which was done by sequential tape casting. Basing on this, the slurry composition and ratio of ingredients were systematically varied in order to obtain flat, crack-free green tapes suitable for upscaling of the manufacturing process. Debinding and sintering parameters were adjusted to obtain defect-free membranes with diminished bending. The crucial parameters are the heating ramp, sintering temperature, and dwell time. The microstructure of the asymmetric membranes was investigated, leading to a support porosity of approximately 35% and a membrane layer thickness of around 20 µm. Microstructure and oxygen flux are comparable to asymmetric La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) membranes manufactured from custom-made powder, showing an oxygen flux of > 1 mLcm−2min at 900 °C in air/Ar gradient. 
LB  - PUB:(DE-HGF)16
C6  - pmid:32019115
UR  - <Go to ISI:>//WOS:000515503100121
DO  - DOI:10.3390/ma13030614
UR  - https://juser.fz-juelich.de/record/873402
ER  -