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Effects of Solvent Mixtures on Dispersion of Lanthanum‐Modified Lead Zirconate Titanate Tape Casting Slurries
Author(s) -
Feng JianHuei,
Dogan Fatih
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01449.x
Subject(s) - dispersant , materials science , chemical engineering , solvent , dispersion (optics) , lead zirconate titanate , solubility , slurry , adsorption , mineralogy , composite material , chemistry , organic chemistry , ferroelectricity , dielectric , physics , optoelectronics , optics , engineering
The effects of xylenes/ethanol solvent mixtures on lanthanum‐modified lead zirconate titanate (PLZT) nonaqueous suspensions were investigated by measuring sediment height, viscosity, and adsorption of dispersant. Well‐dispersed colloidal suspensions were obtained in xylene‐rich solvents with a minimum amount of menhaden fish oil as a dispersant. It was also shown that adsorption of dispersant on particle surfaces strongly depends on selection of solvent(s). The ratio of solvent mixture affects PLZT solids content of unfired tapes, in which using insufficient as well as excess dispersant could decrease the packing density of particles. Solubility of other organic additives, such as binder, was also considered when selecting a xylene/ethanol ratio.