  Water dispersion of nanometric yttria stabilized zirconia (YSZ) particles
synthesized by continuous hydrothermal synthesis are transferred into nanoinks
for thin film deposition. YSZ nanoparticles are synthesized in supercritical
conditions resulting in highly dispersed crystals of 10 nm in size. The
rheology of the colloid is tailored to achieve inkjet printability (Z) by using
additives for regulating viscosity and surface tension. Inks with a wide range
of properties are produced. A remarkable effect of nanoparticles on the ink
printability is registered even at solid load < 1% vol. In particular,
nanoparticles hinder the droplet formation at low values of the printability
while suitable jetting is observed at high Z values, i.e. Z ca. 20. For the
optimized inks, we achieve high quality printing with lateral and thickness
resolution of 70 um and ca. 250 nm respectively, as well as self levelling
effect with a reduction of the substrate roughness. Densification is achieved
at sintering temperatures below 1200 C.
