Dispersion and rheological studies of Y�?�PSZ tape casting slurry

[摘要] Different solvent systems in combination with three different dispersants were tried to find out the suitable solventâ€�?�dispersant combination, which give optimum dispersion of PSZ. Based on sedimentation, viscosity and rheology characteristics, zeotropic ethanol : xylene with a ratio of 50 : 50 along with 0.5 wt% phosphate ester was found to be the best solvent and dispersant combination. Optimized tape casting slurry was prepared using PEG 600 and BBP as plasticizers and PVB as the binder. Cyclohexanone was used as the homogenizer. The optimized slurry composition with 58% solid loading exhibited shear-thinning pseudoplastic rheological behaviour. Yâ€�?�PSZ tapes of ∼ 50 𝜇m thickness free from visible defects were cast with a green tape density of 55%.

[学科分类] 材料工程

[关键词] Tape casting;dispersability;sedimentation;rheology.