The demand for materials with multifunctional qualities has skyrocketed with the quickening pace of designing and engineering smart and effective electronic devices like piezoelectric sensors. Herein, high-temperature piezoelectric bismuth layer-structured ferroelectrics material has been incorporated by MnO2 to form Bi3TiTaO9:xwt%MnO2 with x=0-0.3, (BTTO:xMn) to investigate the influence of MnO2 on the ferroelectric, energy storage efficiency and piezoelectric properties. Despite the intercalation of Mn-ions at the lattice location, the structure of all ceramics are preserved. At x=0.2, the addition of MnO2 into BTTO lattices has enhanced the material’s multifunctional properties. At room temperature, it has shown a high remnant polarization (Pr) of 11.04 µC/cm2, recoverable energy density ( Wrec ) of ~ 0.98 J/cm3, energy conversion efficiency (η) of ~ 63 %, high piezoelectric co-efficient (d33) of 20 pC/N and dielectric constant (ɛr) of 133 with very low dialectic loss, which are much improved than pure BTTO ceramics. Furthermore, even after annealing at 600 °C, the BTTO:0.2Mn ceramic has shown excellent piezoelectric thermal stability, retaining 80 % (16pC/N) of its initial value. Achieved results clearly indicate, BTTO:0.2Mn ceramic is a promising candidate for future wide-temperature pulse power applications and high-temperature piezoelectric devices.

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