This work present the properties of ceramic slurries based on Yttrium III Oxide fabricated by new ecological method based on water soluble binders. Those produced slurries were used to manufacturing ceramic shell moulds for turbine parts. Due to the high purity, lack of alloys reactivity with high contains of Hf, Yttria was applied. Ceramic slurries were prepared in reactor using mechanical mixer. Main binder was substance with nanoparticles of aluminium oxide. Main powder was added as a mix two different granulation (200 mesh, and 325 mesh)in 50%-50% ratio. Additionally for better rheological parameters three binders in amount of 6, 10 and 15 wt.% were added as a 30 wt.% water solution. State phase was 77 wt.%. To better liquidation first test was after 24 hours of mixing. To thoroughly describe the rheological and technological properties of ceramic slurries density, pH, Zhan Cup 4#, viscosity, dynamic viscosity and plate weight test were characterized. Morphology of Yttrium III Oxide powder were researched by: SEM, XRF and XRD. Also grain size was analyzed. Obtained results of investigated ceramic slurries based on Y2O3 were meet the standard industrial requirements. In this context Yttria slurries present very promising properties for new materials for shell moulds coatings preparation in investment casting process.