Abstract
If ultrasonic waves are introduced into a colloidal suspension, alternating potentials of the same frequency are developed within the suspension between points separated by one-half wavelength. This phenomenon is associated with the distortion of the diffuse layer of ions surrounding each colloidal particle. The effect has been measured with pulse-modulated ultrasonic waves at carrier frequencies of 200 and 1000 kc/sec for several aqueous colloidal systems. For a 25-percent silical suspension with a specific conductance of 150 micromhos, the amplitude of the effect at 200 kc/sec has been found to be approximately 0.02 volt per atmos or −155 db re.: one volt per dyne/cm2. For such suspensions the alternating potentials appear to be directly dependent on the ratio of the colloid concentration to the specific conductance of the system. This effect offers an interesting method for the investigation of the physical properties of colloidal suspensions, particularly with respect to the electrokinetic characteristics.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
