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Weakly Flocculated Aqueous Alumina Suspensions Prepared by the Addition of Mg(II) Ions
Author(s) -
Dakskobler Aleš,
Kosma[cbreve] Tomaž
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.tb01253.x
Subject(s) - dispersant , suspension (topology) , aqueous solution , chemical engineering , magnesium , particle (ecology) , aqueous suspension , ion , flocculation , slurry , surface charge , materials science , layer (electronics) , chemistry , inorganic chemistry , dispersion (optics) , organic chemistry , composite material , physics , oceanography , mathematics , homotopy , geology , pure mathematics , optics , engineering
Well‐dispersed aqueous alumina suspensions were prepared at an inherent pH via the addition of an anionic dispersant. With the addition of an appropriate amount of magnesium acetate to such a suspension, the surface charge of the particles was neutralized, which was reflected in the destabilization of the slurry. Because of the formation of coordinative bonds between the Mg ion and the two dissociated carboxylic groups of the dispersant, a thin neutral layer was formed on the surface of the particles, which established a nontouching particle network and resulted in a weakly flocculated suspension.