High electromechanical coupling piezoelectrics: relaxer and normal ferroelectric solid solutions

摘要

A new category of piezoelectric ceramics with very high electromechanical coupling was discovered in a lead zinc niobate-lead titanate solid solution in a single crystal form. The maximum coupling factor k(33) reaches 95%, which corresponds to the energy conversion rate twice as high as the conventional lead zirconate titanate ceramics. This paper reviews the previous studies on superior piezoelectricity in relaxer ferroelectric: lead titanate solid solutions and on the possible mechanisms of this high electromechanical coupling. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 21]