Effect of Compliant Layers in Piezoelectric Composite Energy Harvester for Spinal Fusion Applications

摘要

The addition of a compliant layer significantly increased the power produced by the stacks across all mechanical loading conditions and resistances while PZT volume remained constant. The new manufacturing method utilizing a PZT composite disc stack lowered the source impedance at maximum power output, while maintaining the tough mechanical properties, both necessary in spinal implant materials. Additionally, the power obtained from the composite PZT stacks was substantially higher than previously used PZT fiber composites. Further mechanical testing should be done to characterize failure of the proposed material for potential use as a generator for DC stimulation in interbody devices to improve spinal fusion outcomes.