Investigation of mechanical properties of alumina thin film prepared by inkjet printing

In this work, a thin Al2O3 (α-alumina) film was fabricated on a graphite substrate using a lowcost thermal inkjet printing method. The film was made by multiple sequential printing ofalumina suspension (15 wt. %) as ink. The printed film was pre-sintered in 900 °C for 2 h in order to burn out graphite substrate and polymeric materials and finally was sintered in 1500 °Cfor 2 h to promote densification. The ink used in this work was well dispersed colloidalsuspension, containing alumina ceramic powder, isopropanol as a solvent, 4-hydroxybenzoic acid as a dispersant and polyvinyl butyral (PVB) as a binder. Mechanical properties of fabricated layer including final density and hardness and microstructure determined by SEM and XRD revealed that inkjet printing can be a trustworthy technique in thin film productions.

کلیدواژه ها:

inkjet printing ، alumina ، density ، colloidal suspension