Dispersion and rheological studies of Y-PSZ tape casting slurry

Dispersion and rheological studies of Y-PSZ tape casting slurry

Different solvent systems in combination with three different dispersants were tried to find out the suitable solvent-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...

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Veröffentlicht in:Bulletin of materials science 2005-04, Vol.28 (2), p.103-108
Hauptverfasser: Kumari, K. G. Vasantha, Sasidharan, K., Sapna, M., Natarajan, Raghu
Format: Artikel
Sprache:eng
Schlagworte:
Casting
Cyclohexanone
Dispersants
Dispersion
Dispersions
Ethanol
Ethyl alcohol
Partially stabilized zirconia
Phosphate esters
Pseudoplasticity
Rheological properties
Rheology
Shear thinning (liquids)
Slurries
Solvents
Tape casting
Xylene
Zirconium dioxide
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Zusammenfassung:Different solvent systems in combination with three different dispersants were tried to find out the suitable solvent-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. Y-PSZ tapes of ∼ 50 Μm thickness free from visible defects were cast with a green tape density of 55%.
ISSN:0250-4707
0973-7669
DOI:10.1007/BF02704227