Measurement of SiC Particle Size Based on Ultrasonic Attenuation Spectrum

摘要

To compare the different effects under different excitation methods during the measurement on the particle size of silicon carbide (SiC),an experimental system has been established to get different signal excitations of burst wave,continuous wave and pulsed wave.Variable sound path method is adopted during the measurement to obtain the ultrasonic attenuation spectrum of SiC suspensions with two immersion transducers at four different mass concentrations under the same experimental condition.It is found that the ultrasonic attenuation coefficients excited by three different waves increase with increasing frequency and the tendency is approaching the same.The result calculated by a normalized spectrum of the optimal regularization methods shows that SiC particle size distribution under the three excitation methods is similar,which indicate that the different excitation methods on particle size characterization have almost no influence to result.