Speaker
Description
This article presents the synthesis and characterisation of lead free BCZT (Ba₀.₈₅Ca₀.₁₅Ti₀.₉Zr₀.₁O₃) nanopowder produced by the solid-state reaction technique, employing two grinding cycles to enhance crystallinity. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) verified that grinding the materials five times yielded a highly crystalline BCZT with a cubic perovskite structure. The BCZT powder was filled into a polydimethylsiloxane (PDMS) matrix at different weight percentages (1%, 3%, 5%, and 10%) to investigate the performance in term of piezoelectric coefficient and generated voltage. The BCZT-PDMS composites displayed an amorphous form attributable to the polymer matrix. While preserving the functional piezoelectric characteristics of the ceramic filler, the result shows 10% wt exhibit higher d33 measurement with 45 pC/N which increased approximately 50% compared to 5% wt. Furthermore, the piezoelectric performance was assessed using d₃₃ measurements and voltage production during mechanical excitation utilising a solenoid with a constant force of 20 Nm and a frequency of 10 Hz. The findings indicated that the piezoelectric generate voltage well with BCZT-PDMS composite with 5 wt%, yielding a maximum output voltage of 8 V. However, by increasing BCZT to 10%w.t, piezoelectric performance reduced 20% which generate 6 V. Finally, the capability of BCZT-PDMS composites for application in self-sustaining is verified for energy harvesting application.
