TY  - JOUR
AU  - Scheepers, Fabian
AU  - Burdzik, Andrea
AU  - Stähler, Markus
AU  - Carmo, Marcelo
AU  - Lehnert, Werner
AU  - Stolten, Detlef
TI  - A New Setup for the Quantitive Analysis of Drying by the Use of Gas-phase FTIR-Spectroscopy
JO  - Review of scientific instruments
VL  - 89
IS  - 8
SN  - 0034-6748
CY  - [S.l.]
PB  - American Institute of Physics
M1  - FZJ-2018-02635
SP  - 083102 -
PY  - 2018
AB  - Drying rates are important for the manufacture of thin films and in specific for the production of electrodes used in electrochemical devices such as fuel cells and electrolyzers. The known procedures to investigate time-dependent sample compositions and selective evaporation rates are insufficient to obtain mean information about the full area instead of a single point analysis. Therefore, a new setup is presented using gas-phase Fourier-transform infrared spectroscopy. This method analyzes the gas-phase composition to recalculate the layer composition in electrode fabrication at any time during drying. According to the golden rule of measurement technology, manufacturer specifications are often overestimated. Therefore, our alternative procedures were used to evaluate the precision of devices used. The calculated measurement precision is confirmed by validation. The expected deviation is quantified to be less than 2% for the common application. Further on, the relative test-retest standard deviation is determined to be 0.3%–0.4%. As a result of the error propagation, the measurement precision is limited by the background gas flow rate precision for common application. At low volume fractions, the influence of the substance flow rate deviations becomes significant. However, further studies will focus on increasing the gas flow rate precision
LB  - PUB:(DE-HGF)16
C6  - pmid:30184627
UR  - <Go to ISI:>//WOS:000443720400003
DO  - DOI:10.1063/1.5036817
UR  - https://juser.fz-juelich.de/record/845361
ER  -