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Dissolution and Dispersion Behavior of Barium Carbonate in Aqueous Suspensions
Author(s) -
Li ChiaChen,
Jean JauHo
Publication year - 2002
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.1151-2916.2002.tb00566.x
Subject(s) - dissolution , dispersion (optics) , chemistry , aqueous solution , isoelectric point , suspension (topology) , barium , inorganic chemistry , barium carbonate , leaching (pedology) , carbonate , organic chemistry , soil water , optics , raw material , physics , mathematics , homotopy , pure mathematics , enzyme , environmental science , soil science
Dissolution of BaCO 3 and its effect on the dispersion behavior of aqueous BaCO 3 suspensions at various pH values have been investigated. The amount of leached Ba 2+ decreases with increasing pH value, which agrees with thermodynamically calculated results. The dissolution of BaCO 3 also causes an increase in pH value of the suspension, but the change decreases with increasing initial pH value. The isoelectric point (IEP) of leached BaCO 3 powder is at a pH of ∼10–10.5 and remains unchanged with increasing solids loading. The IEP of BaCO 3 shows no significant change with added KCl or K 2 CO 3 , but shifts to a higher pH with increasing concentration of added BaCl 2 .