Effect of lithium doping in BaTiO₃ ceramics for vibration sensor application

Phase pure undoped and Lithium doped BaTiO₃ particles have been synthesized by high temperature solid-state reaction method. Substitution of Lithium at the Ba²⁺ site in BaTiO₃ lattice has been investigated. The structural, vibrational, electrical and mechanical characterization have been carried out. The poled samples were used as a sensing element for the detection of mechanical oscillations and the presence of 80 Hz pulse in the output spectrum manifest the response of the sensor element to the applied mechanical stress. In comparison with pure BaTiO₃ the sensitivity of Li doped BaTiO₃ is 14 times greater than the pure BaTiO₃. This confirms that Li doped BaTiO₃ could be an efficient candidate for the functionalization of vibration sensors in space application.