Material development and rheological characterization

Material development and rheological characterization

Rheometer for the characterization of pastes and inks
© Fraunhofer IWS Dresden

Rheometer for the characterization of pastes and inks

The fabrication of stable and rheologically optimized dispersions is necessary for the synthesis of printable pastes and inks for various applications. Therefore we combine metallic, semimetallic or ceramic micro- and nanomaterials with different polymer binder systems and additives to optimize the degree of dispersion and rheological characteristics.

Important parameters, among others, are particle size, type and concentration, the choice of binder systems, manufacturing processes, and furthermore, flow properties of resulting composite pastes. To assess suitability it is often not enough to just indicate a viscosity since properties such as dilatancy, height of zero shear viscosity or thixotropic behavior have serious influence on printing processes. The Printing team has excellent experience in particle dispersion, composite paste manufacturing and characterization.