The Dynamic Mobility and Dielectric Response of Kaolinite Particles

A new electroacoustic instrument (AcoustoSizer, Matec Applied Sciences) has been used to measure the dynamic mobility of Nakaolinite and γ-aluminium hydroxide (gibbsite) suspensions at MHz frequencies. In both suspensions the particles consist of thin, approximately hexagonal plates. Information abo...

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Veröffentlicht in:	Journal of colloid and interface science 1995-10, Vol.175 (1), p.190-200
Hauptverfasser:	Rowlands, William Neil, O'Brien, Richard Wyndham
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Colloidal state and disperse state dielectric response dynamic mobility electroacoustics Exact sciences and technology General and physical chemistry gibbsite kaolinite oblate spheroids particle size Physical and chemical studies. Granulometry. Electrokinetic phenomena surface conductance zeta potential
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Zusammenfassung:	A new electroacoustic instrument (AcoustoSizer, Matec Applied Sciences) has been used to measure the dynamic mobility of Nakaolinite and γ-aluminium hydroxide (gibbsite) suspensions at MHz frequencies. In both suspensions the particles consist of thin, approximately hexagonal plates. Information about the particle size and the electrokinetic charge or ζ potential can be obtained from the dynamic mobility spectrum. For kaolinite particles, the interpretation of the dynamic mobility spectrum is complicated by the presence of anomalously high surface conductance. This profoundly affects the shape of the dynamic mobility spectrum at low (
ISSN:	0021-9797 1095-7103
DOI:	10.1006/jcis.1995.1445