3203HD, a piezoelectric ceramic material manufactured by CTS, was developed in the 1980s to meet the requirements for medical ultrasound. This high dielectric constant, high electromechanical coupling coefficient material, which is known for its consistency and reproducibility, became the reference material for medical ultrasound imaging and is still used in many transducers today.However, material requirements for ultrasonic imaging have evolved leading to the need for new materials. In particular there has been a demand for higher dielectric constant materials and materials that offer good mechanical strength and performance at dimensions less than 50 microns. There are often property trade-offs to be considered when developing new materials. Substitution of various lanthanide ions into an existing piezoelectric material formulation shows that the dielectric constant decreases and the Curie point increases with increasing atomic number for the lanthanide ion. Dielectric properties are often less than predicted as the material cross-section decreases. Polished cross sections of a 2-2 composite structure reveal surface damage that is one grain deep on the ground and diced surfaces. An empirical model suggests that the effective dielectric constant of the damaged surface is lower than the bulk material, which causes the measured capacitance to be lower than expected.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.