Study of Y-cut LiNbO3 (010) crystal under oscillated vibration at high temperature for energy harvesting in hostile environment

In this study we report the energy harvesting via piezoelectric Y-cut LiNbO
₃
(010) crystal under oscillated vibration at temperature from 200°C to 500°C. The aim of the study was to investigate to the potential of LiNbO
₃
for high temperature applications rather than to optimize the design of the harvester. The conductivity, relative permittivity and loss tangent of LiNbO
₃
was assessed via impedance spectroscopy measurements by raising the temperature from 50°C to 750°C and back to 50°C. The output voltage under resonant frequency was found to be stable from 200°C to 400°C and collapsed at 500°C due to the loss in the spring stiffness of the load spring.