A surface treating method for ceramic particles to improve the compatibility with PVDF polymer in 0-3 piezoelectric composites

摘要

Piezoelectric ceramic-polymer composites with 0-3 connectivity are considered to be important materials for underwater acoustic transducer and medical diagnostic applications since they can be fabricated in suitable thin and flexible forms to provide enhanced hydrostatic piezoelectric properties and improved acoustic impedance. Among the composites studied so far, attention has been paid to many aspects that affect the properties of the composites, such as the size of the ceramic particles [1], the utilization of different ceramics [2], and the manufacturing and poling process of the composites [3], etc. There is another important factor to decide the electromechanical behaviour of the composites: the compatibility of the ceramic particles with the polymer matrix. The great difference of the physical and chemical properties between organic polymers and inorganic ceramics often causes poor affinity of these two components, which makes the composites fragile, porous and not uniform. Usually, these composites are not well polarized and so have less utility.