Viscosity of Silver Based Nano-Inks

The paper deals with the analysis and viscosity measurements of five commonly available silver based nano-inks at different temperatures. The kind of solvent, dimension of nano-particles and temperature play a key role for the viscosity of nano-inks. For the controlling of the deposition process of nano-inks by inkjet printing technology, knowledge of the rheological properties of applied nano-inks are necessary. It is really difficult to preserve the stable temperature in the printing nozzle during the deposition process, for this reason the voltage signal which is controlling the piezo-elements in the nozzle has to be modified due to the viscosity changes. For this reason, this paper offers the practical results from the viscosity measurements, which were done by rheometer MCR 502 Anton Paar. Furthermore, the paper offers the comparative study of the viscosity measurements of different kind of silver based nano-inks. The twin gap method was applied due to achieving of high accuracy of measurements. As the preliminary results show, the viscosity of silver based nano-inks has the strong dependence on the temperature.