ELECTROMECHANICAL TRANSDUCERS USING COUPLED FERROELECTRIC-FERROELASTIC CRYSTALS

摘要

The coupled ferroelectric-ferroelastic properties of crystals such as gadolinium molybdate are used to provide an effectively high-compliance mechanical-electrical transducer whereby mechanical displacement of the crystal results in displacement of a zigzag domain wall. Charge proportional to the displacement flows between electrodes on the two surfaces of the crystal intersected by the wall through an electrical impedance analogous to the mechanical function. Appropriate voltage is developed or supplied across the impedance to measure or develop the mechanical function.