ABSTRACT

‘Aligned-type’ piezoelectric rubber is a composite of piezoelectric ceramic, lead zirconate titanate (PZT) particles, which are aligned in a silicone rubber matrix. The aligned-type piezoelectric rubber has both elasticity and piezoelectricity. PZT, a piezoelectric ceramic, does not have elasticity. Also, piezoelectric polymers such as polyvinylidene difluoride (PVDF) have elasticity but can only form a thin film. The conventional aligned-type piezoelectric rubber (CAT) is as thin as about 2 mm, has a high spring constant. Therefore, a thick aligned-type piezoelectric rubber (TAT), having a thickness of 10 mm was fabricated by a new method, the “inversion method”. The TAT was possible to reduce the spring constant to less than 1/5 of that of the CAT while maintaining the piezoelectricity (d33) equivalent to the CAT. Also, the d33 of the TAT is more than twice that of PVDF, and it is Young’s modulus is less than 1/200 that of PVDF.

摘要

“排列型”压电橡胶是压电陶瓷、锆钛酸铅 (PZT) 颗粒的复合材料，它们排列在硅橡胶基质中。取向型压电橡胶兼具弹性和压电性。PZT是一种压电陶瓷，没有弹性。此外，压电聚合物如聚偏二氟乙烯 (PVDF) 具有弹性，但只能形成薄膜。传统的排列型压电橡胶 (CAT) 薄至约 2 毫米，具有高弹簧常数。因此，通过“反转法”这一新方法制造了厚度为 10 mm 的厚取向型压电橡胶 (TAT)。TAT 可以将弹簧常数降低到 CAT 的 1/5 以下，同时保持与 CAT 等效的压电性 (d33)。还，