COMMENTS ON THE PREDICTION OF THE ACOUSTIC IMPEDANCE IN PARTICLE/POLYMER COMPOSITES

摘要

A comparative analysis of some basic experimental and theoretical data on the acoustic impedance of particle/polymer composites for transducer backing applications has been carried out. In the low filler fraction range, the experimental results converge and agree with existing theoretical niodels. At high filler fractions, necessary to obtain the PZT impedance, the results appear unpredictable. Physical reasons for this unfavourable side of composite technology, and possible ways out are discussed.