The acoustic properties of PZT/polymer composite materials were studied. PZT powder was fabricated by wet-dry ball milling process. PZT/Polyurethane composite was fabricated to apply for underwater acoustic device like SONAR. PZT/Polyester composite was fabricated to study about the filler effect on the acoustic properties of polymer composite material.
Due to the unlike of published data being available on the materials of particular interest and the scarcity of measuring facilities, it is necessary to show the acoustic properties of material with correlated acoustic data including environmental conditions.
Underwater device was used in 10-100 kHz. But acoustic properties of material were measured in different measurement range. So it is necessary to predict the acoustic properties in 10-100 kHz.
Through transmission method was used to measure the acoustic properties of Polyurethane composites in MHz range. Kramers - Kronig relation was used to predict the acoustic properties of 10-100 kHz range, and it was applied to the data obtained by through transmission method.
Acoustic properties of Polyurethane composites were obtained by measurements of dynamic modulus in 1-100 Hz, and TTSP was used to obtain the master curve of properties. Sound velocity of Polyurethane composite was calculated from the master curve and from the result obtained by the through transmission method. Attenuation and sound velocity of Polyurethane and PZT/Polyurethane were compared in the respect of attenuation mechanism. The difference of measurement method was studied and the Application of dynamic modulus measurement method for Polymer composite was studied.
Ultrasonic Pulse echo method was applied to measure the acoustic properties of PZT/Polyester composite. The filler effect on acoustic properties was studied. There is a shift of maximum attenuation with frequency and the size effect of PZT filler on the attenuation of composite material. These results compared with other researcher's simulation results. The sound velocity and modulus of composite material were predicted by CPA Model.
