Performance enhancement of functionally graded piezoelectric tile by tailoring poling orientation

Abstract

Improving the operating efficiency of piezoelectric tiles is currently a significant subject of scientific study. The current work proposes a viable solution for enhancing the efficiency of existing piezoelectric tiles by incorporating the synergistic effect of various piezoelectric modes of operation with the material grading index. In this article, energy harvesting of the functionally graded piezoelectric tile has been introduced by utilizing poling-oriented material. The vibration response of the piezoelectric tile is modeled using the finite element method. Five different piezoelectric materials are investigated for poling tuning phenomenon. PMN-0.35 PT shows the largest improvement in piezoelectric properties measured in terms of the Figure of merit and piezoelectric strain coefficient values. Functionally graded piezoelectric tile of Pb(Mg_1/3 Nb _2/3)O₃-0.35PbTiO₃ (PMN-0.35 PT) and -(C₂H₂F₂)_n- (PVDF) is analyzed for performance evaluation in terms of voltage and power density. The functionally graded tile shows an improvement of 1741% and 333.5% in power density and voltage, respectively compared to the original material at optimized values of grading index and poling orientation.

Keywords:

• Energy harvesting
• finite element modeling
• piezoelectric material
• functionally graded material
• performance enhancement