Accession Number:

AD0256870

Title:

COLLOIDAL VIBRATION POTENTIALS IN SILICA SUSPENSIONS

Descriptive Note:

Corporate Author:

ULTRA ELECTRIC LTD LONDON (ENGLAND)

Report Date:

1960-12-01

Pagination or Media Count:

1.0

Abstract:

Ultrasonic waves transmitted through a colloidal suspension in a liquid produce alternating potentials within the suspension colloidal vibration potentials, because the sound waves produce a periodic distortion of the diffuse ionic layer surrounding each colloidal particle. Each colloidal particle with its ionic atmosphere acts as an oscillating dipole. The effect is used to study the properties of the diffuse ionic layer surrounding each colloidal particle. Quantitative measurements of this effect were made in silica suspensions with pulse-modulated ultrasonic waves at frequencies from 200 to 1200 kc.sec. The experimental values for the colloidal vibration potentials are in reasonably good agreement with values calculated from the treatment of this effect by Enderby, particularly for suspensions of relatively high specific conducta e. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE