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Development and characterization of inks for screen printing of glass solders for SOFCs
Author(s) -
Dittrich Svenja,
Reitz Elisabeth,
Schell Karl Günter,
Bucharsky Ethel Claudia,
Hoffmann Michael J.
Publication year - 2020
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13461
Subject(s) - materials science , rheometry , rheology , viscoelasticity , composite material , screen printing , ceramic , viscosity , impression , slurry , suspension (topology) , computer science , mathematics , homotopy , world wide web , pure mathematics
Glass ceramics are supposed to produce stable sealants between ceramic electrolyte and ferritic steel in planar SOFC stacks. The screen printing method is a suitable industrial process in order to produce layers with tailored height and width reproducibly. An appropriate suspension was developed for this application and improved by adjusting the additive composition. This study investigates the rheological behavior of screen printing inks and the corresponding topography of the printed layers. Rotary measurements were carried out to analyse the impact of shear rates on viscosity showing shear thinning behavior. In addition, oscillatory rheometry is performed to gain information about the viscoelastic properties of the slurries and to understand the internal structure of the developed inks. The viscoelasticity and the recovery behavior after shear loading are crucial for the topography of printed films. The principal investigations are executed on solvent‐based suspensions, whereby the knowledge gained is used for a transfer to water‐based systems allowing a more environmentally friendly handling.