High strain actuator using ferroelectric single crystal
AssigneeThe Penn State Research Foundation
InventorsSeung-Eek Park, Thomas R. Shrout
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Abstract
An actuator incorporating the invention includes a body of a ferroelectric material. The material is single crystalline and incorporates solid solutions of lead zinc niobate-lead titanate or lead magnesium niobate-lead titanate, described by the formulae: Pb(Zn.sub.1/3 Nb.sub.2/3).sub.1-x Ti.sub.x O.sub.3 and Pb(Mg.sub.1/3 Nb.sub.2/3).sub.l-y Ti.sub.y O.sub.3 l where x and y are defined as 0.ltoreq.x<0.10, and 0.ltoreq.y<0.40. Electrodes enable application of an electric field across the body in a direction that is generally aligned with a <001> crystallographic axis of the ferroelectric material.
Claims6
An actuator comprising:
- a body comprising at least one single crystal of a ferroelectric material, said ferroelectric material being either lead zinc niobate-lead titanate or lead magnesium niobate-lead titanate;
- and
- means for applying an electric field across said body, said electric field oriented within approximately +/- 20.degree. of a <001>
- crystallographic axis of said at least one single crystal.
Dependencies are inferred from the claim text.