Pb(Zr0.54Ti0.46)O3+ 0.2 wt% Cr2O3+ 1.0 wt% Nb2O5조성의 압전 후막을 이용한 유니몰프형 캔틸레버 발전기(UCG)의 최적화

Abstract

We fabricated piezoelectric unimorph cantilever generators (UCG) using + 0.2 wt% + 1.0 wt% (PZCN) piezoelectric thick films, which were produced by a tape casting method. The PZCN thick films were tailored with same width and thickness but different lengths from 7.7 to 57.7 mm in order to evaluate optimized UCG for energy harvesting device applications. When the length of PZCN film was increased, the resonance frequency of UCG was slightly increased from 7 Hz to 8 Hz, which could be due to enlarged area of the highly stiff piezo-ceramic film. However, the output power was proportionally increased with the length of PZCT film and it reached 4.68 mW (1.221 ) when the film`s length was 57.7 mm under 25 g of tip mass at 8 Hz, which is sufficient for micro-scale device applications.