For medical imaging transducers, attention has focused on the 1-3, PZT-rod/polymer composite structure. The piezoelectric plates used i n such ultrasonic transducers consist of a polymer matrix which holds together parallel thin rods of piezoelectric ceramic oriented perpendicular to …

This process realized an array of lead zirconate titanate (PZT) rods whose cross section is 25 micron. The composite made up of circular sectional PZT rods was clarified not to have an internal lateral frequency mode and it is available over a wide frequency range.

PZT ceramic is widely used as sensors, especially in underwater applications like sound navigation and ranging (SONAR), due to its piezoelectric properties. However, single-phase PZT ceramics have poor hydrostatic piezoelectric properties, leading to the development of porous PZT and PZT-polymer composites.

2010年1月1日 · In particular, a 1-3 piezocomposite, or PZT-rod/polymer-matrix composite is considered most useful. The advantages of this composite are high coupling factors, low acoustic impedance, good matching to water or human tissue, mechanical flexibility, broad bandwidth in combination with a low mechanical quality factor and the possibility of making ...

2015年1月15日 · The piezoceramic fiber or rods play an active role for energy conversion between the mechanical and electrical energy, while the polymer phase acts as a passive medium and transfers the mechanical energy between the piezoelectric ceramic and surrounding with which the composite interacts [19].

PZT/P(VDF-TrFE) 1-3 composites were fabricated by embedding pre-sintered PZT rods in a pre-poled copolymer matrix. The rods were then poled using an electric field much lower than the coercive field of the copolymer. The electromechanical coupling factor k/sub t/, and the resonance characteristics of the composites were measured.

Piezoelectric Composite Materials for Ultrasonic Transducer Applications. Part I: Resonant Modes of Vibration of PZT Rod-Polymer Composites

These rod composites, or more formally 1-3 PZT-polymer composites, consist of parallel rods of piezoelec- tric ceramic held together by an epoxy matrix. Such structures offer improved electromechanical properties and the possibility to tailor those properties to optimize system performance. 1. Schematic.

2017年12月31日 · In particular, a 1-3 piezocomposite (PZT-rod/polymer-matrix composite) is considered most useful. The advantages of this composite are high coupling factors, low acoustic...

Composites with 3–1 connectivity for transducer applications were made by embedding extruded PZT rods in an epoxy matrix. The effects of rod diameter, volume fraction of PZT, and composite thickness on the hydrostatic properties of the composites were determined.