Inversely Prepolarized Piezoceramic Cantilever

Abstract

A nonuniform piezoelectric cantilever with enhanced amplitude of vibration at resonances is proposed. The cantilever made of lead zirconate titanate (type of PZT-5H) containing inversely poled piezoelectric domains shows an advantageous increase in vibration amplitude when compared to a single domain device. The amplitude of vibrations is enhanced when the domain boundaries are located at the nodes of vibration displacement. The vibration amplitude of a cantilever with 2 or 3 periodically inverted domains is mostly affected at the 2nd or 3rd resonance frequency, respectively. The amplitudes are calculated using the Finite Element method (FEM).