A new method to determine the un-poled elastic properties of ferroelectric materials. Issue 1 (31st December 2017)

• Record Type: Journal Article
• Authors: Bowen, Chris. R.; Dent, Andrew C.; Stevens, Ron; Cain, Markys G.; Avent, Andrew
• Is Part Of: Science and technology of advanced materials. Volume 18:Issue 1(2017)
• Page Start: 264
• Page End: 272
• Publication Date: 2017-12-31
• Subjects: Ferroelectric -- un-poled -- poled -- piezoelectric ceramic -- elastic; 40 Optical, magnetic and electronic device materials -- 202 Dielectrics / Piezoelectrics / Insulators -- 208 Sensors and actuators -- 404 Materials informatics / Genomics; Materials -- Technological innovations -- Periodicals; 620.112
• DOI: 10.1080/14686996.2017.1302274
• Languages: English
• ISSNs: 1468-6996

Abstract

Abstract: Piezoelectric devices with complex electrode geometries often contain ferroelectric regions that experience little or no electric field and remain unpolarised. Since the un-poled and poled material properties differ it is desirable to account for these regions in a device when developing predictive models or to design piezoelectric transducers. The lack of published data on the elastic properties for un-poled ferroelectrics, specifically the numerous commercial compositions such as lead zirconate titanate, reflects the difficulty of experimental measurement. In this work, a method for predicting un-poled properties from more commonly available poled data has been developed. A new method of calculating these properties is presented which provides a rapid and practical solution to the problem of evaluating the isotropic stiffness and Poisson's ratio for an un-poled ferroelectric material. The way in which this calculation has been derived and validated is presented and detailed comparisons are made with alternative methods and experimental data. Abstract :