Dielectric Loss Reduction of Ferroelectric Lead Magnesium Niobate-Lead Titanate Sound Projector Drivers

Abstract

Improvement of the large signal dielectric loss of a commercial ferroelectirc lead magnesium niobate-lead titanate (PMN-PT) sound projector driver has been achieved without sacrificing other electromechanical properties. Length extensional resonators fabricated from the modified composition have been characterized for dielectric losses, 33-mode electromechanical coupling, and acoustic energy density under uniaxial compressive stress and large signal drive requirements for sound projectors. Selective doping and microstructural control have been used to achieve the desired properties.

Keywords:

• Lead magnesium niobate
• lead titanate
• sound projector drivers
• dielectric loss
• ferroelectric

Acknowledgement

This work is sponsored by the office of Naval Research. Contract No: N0001401WX20115.