| Abstrakt: |
One of our major interests in the past few years has been in the development of diphasic transducer materials made from polymers and lead zirconate titanate (PZT) ceramics with high hydrostatic pressure sensitivity. The concept of phase connectivity, the manner in which the individual phases are interconnected, has been used to optimize the electric flux pattern and mechanical stress distributions in attaining remarkable improvements in the hydrostatic strain coefficient (dh) and the hydrostatic voltage coefficient (gh) over the corresponding values of solid PZT ceramics. Recent results on 0-3, 1-3, 1-3-2, 2-2, 3-1, 3-2, and 3-3 composites will be presented, and a comparison made with polyvinylidene fluoride and other hydrophone materials. When driven at high frequency the composite transducers exhibit a number of interesting modes of motions in which the component materials sometimes vibrate out of phase. Some of the proposed applications for composite transducers will be described. [ABSTRACT FROM AUTHOR] |
