2-2压电复合材料面板的压力放大作用

Pressure amplification effect of face plate on 2 2 piezoelectric composites

２－２压电复合材料面板的压力放大作用郑进鸿李锦元（海鹰集团公司江苏无锡·２１４０６１）２－２压电复合材料应用普遍。材料中聚合物对压电陶瓷的应力作用，使性能得到许多改善。在复合材料两电极面上复盖薄面板，由于板的应力传递作用会使接收力和辐射力产生放大效应...

2 2 type piezoelectric composites is used for many practical application. Due to the stress effect of polymer matrix on ceramic in its composite, piezoelectric performance of the composites has been improved. With the face plates on electrodes surface in its composites, its stress transfer between the plate and two constituents the ceramic and polymer matrix so that better receiving sensitivity and transmitting response of 2 2 composite transducer can be achieved. In this paper the effect of the polymer and face plate on the composites is analyzed by static condition. The stress amplification factor(s.a.f) and pressure amplification factor(p.a.f) are derived. It is also predefined confirmatively to select the polymer materials, the face plates materials and its thickness and to determine the geometry and aspect ratio for ceramic and ploymer.