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Dispersion and Rheological Characterization of TiO 2 Tape Casting Slurry
Author(s) -
Arunkumar Konjhiparambil V.,
Panicker Rani N.,
Vasanthakumari Kalarickal G.,
Satheesh Mathew,
Raghu Natarajan,
Unnikrishnan Nelliparampil V.
Publication year - 2010
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2009.02386.x
Subject(s) - materials science , dispersant , tape casting , dispersion (optics) , plasticizer , composite material , rheology , slurry , polyvinylpyrrolidone , homogenizer , casting , solvent , polyethylene glycol , chemical engineering , polymer chemistry , chromatography , organic chemistry , chemistry , physics , optics , engineering
Dispersion behavior of TiO 2 in different solvent systems in combination with two different dispersants was studied and optimized for the dispersion of TiO 2 . Based on sedimentation, viscosity, and rheological characteristics, zeotropic ethanol: xylene with a ratio of 50:50 along with 1 wt% menhaden fish oil is found to be the best solvent–dispersant combination for TiO 2 . Tape casting slurry was optimized using polyethylene glycol 400 and benzyl butyl phthalate as plasticizers and polyvinyl buyral as the binder. Cyclohexanone was used as homogenizer. TiO 2 tapes were obtained by double doctor blade tape casting process. As cast tapes were dried in air at room temperature. The results show that it is possible to obtain homogenous defect‐free green tapes of 58.7% solid loading and green density of 55% having thickness of ∼90 μm.