BaTiO3 piezoelectric microfiber composites for mechanical energy harvesting

In this paper, green microfibers of barium titanate precursor were prepared by the combination of Sol-Gel processing and Gel-spinning technique. The piezoelectric microfibers of ceramic BaTiO₃ were sintered, with diameter of 15μm and length of 20mm, respectively. Interdigitated electrodes were printed on an epoxy resin substrate. BaTiO₃ microfibers were then aligned on the interdigitated electrodes and covered with the solution of epoxy resin, so as to obtain Inter-Digitated Electrodes Piezoelectric Fiber/polymer Composites, IDEPFC. The periodic output voltages with maximum value of 0.86V were obtained under harmonic excitation, by using a finger to apply a dynamic load on the top of the IDEPFC.