The rheological behaviours of CaMgSi2O6 with Al2O3 slurries prepared by a tape casting process were investigated as a function of the amount and composition of organic additives. The slurry formulations were optimised with the solvent type, dispersant content, total binder and plasticiser content and the ratio of binder to plasticiser. The tape casting slurries exhibited a typical shear-thinning behaviour. The density and tensile strength of the green tapes were affected by the rheological properties of the tape casting slurries. The thermal conductivity of the sintered sheets was dependent on the sintering temperature. This result is thought to be attributed to the increase of crystallite size of sintered sheets. Additionally, the thermal diffusivity and specific heat capacity of the sintered sheets were discussed with the relation to the sintering temperature.

Keywords: Rheological behaviour, CaMgSi2O6, Tape casting method