HOU Huaishu1,2 SU Mingxu1 CAI Xiaoshu1

(1　　Institute of Particle and Two Phase Flow Measurement, University of Shanghai for Science and Technology Shanghai 20093)

(2　　College of Mechanical Engineering, Shanghai Institute of Technology Shanghai 201418)

Received Oct. 29, 2009

Revised Oct. 27, 2010

Abstract  Through varying the ultrasonic path length, the ultrasonic attenuation spectrum of the nanometer particle suspensions is measured. Based on the McClements and BLBL model, the Optimum Regularization Technique is employed to inverse the distribution of particle size for nanometer particles. Experiments are carried out to measure the distribution of particle size of aqueous nanometer titanium dioxide suspension with volume fraction of 1%. The ultrasonic measurement results show good consistence with those from TEM(Transmission Electron Microscope) and centrifugal sedimentation particle size analyzers, which indicate that measuring distribution of the particle size of nanometer particles with the ultrasonic attenuation spectrum is feasible and reliable .

PACS numbers:43.58