Aspect Ratio Optimization of Piezoceramic Piezoelements for Maximizing Energy Conversion in Energy Harvesting Applications
摘要
In this work, the dependences of complex electromechanical parameters of rectangle-shaped piezoceramic elements on the aspect ratio, that is the ratio between length (W2) and width (W1) were studied and analyzed. Rectangle-shaped samples of the PZT type dense and porous piezoceramics with the aspect ratio G = W2/W1 in the range from 1 to 6 and equal thickness were prepared and studied. Dependences of complex piezoelectric (d31), electromechanical (k31), elastic (S11E) and dielectric (ε33T) coefficients on the aspect ratio G were measured and analyzed on the length-thickness extensional mode of rectangular piezoelements oscillations using the piezoelectric resonance analysis program (PRAP).