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Medientyp:
E-Artikel
Titel:
Influence of Solids Concentration on the Isoelectric Point of Aqueous Barium Titanate
Beteiligte:
Paik, Ungyu;
Hackley, Vincent A.
Erschienen:
Wiley, 2000
Erschienen in:
Journal of the American Ceramic Society, 83 (2000) 10, Seite 2381-2384
Sprache:
Englisch
DOI:
10.1111/j.1151-2916.2000.tb01565.x
ISSN:
0002-7820;
1551-2916
Entstehung:
Anmerkungen:
Beschreibung:
We report on findings that the particle surface charge is influenced by solids concentration in aqueous suspensions of BaTiO3. Three decades in solids concentration were analyzed by combining results from two different electrokinetic methods. Combined results demonstrate a systematic acidic shift in the isoelectric pH with decreasing solids concentration. The shift is attributed to the development of a Ba‐depleted, TiO2‐rich surface layer. Using kinetic arguments, it is shown that the thickness of this layer will be proportional to the surface‐to‐volume ratio.