An Ultrasound Transducer by Lead Zirconate Titanate (PZT) Nanofibers

2011 ◽  
Author(s):  
Guitao Zhang ◽  
Yong Shi
Keyword(s):  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Average Diameter ◽  
Lead Zirconate ◽  
Ultrasound Transducer ◽  
Resonant Frequencies ◽  
Pulse Delay ◽  
Zirconate Titanate ◽  
Electrospinning Method ◽  
Assumed Mode

In this paper, we demonstrate Lead zirconate titanate (PZT) nanofibers as a transducer to generate and detect ultrasound acoustic waves. PZT nanofibers with average diameter of 102nm were fabricated by the electrospinning method. The as-fabricated nanofibers were collected and aligned across a 10 μm silicon trench with Au electrodes. After annealing, the device was tested with the pulse/delay method. Two resonant frequencies, 8 MHz and 13MHz, were detected respectively. By using the Hamilton’s principle for coupled electromechanical systems with properly assumed mode shape, the resonant frequency was caudated. Base on the current testing result, a broadband ultrasound transducer was envisioned.

scholarly journals Arrangement of Live Human Cells through Acoustic Waves Generated by Piezoelectric Actuators for Tissue Engineering Applications

2020 ◽  
Vol 10 (10) ◽  
pp. 3477
Author(s):  
Marialaura Serzanti ◽  
Marco Baù ◽  
Marco Demori ◽  
Serena Calamaio ◽  
Manuela Cominelli ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Piezoelectric Actuators ◽  
Lead Zirconate ◽  
Fibrin Clot ◽  
Human Cells ◽  
Al2o3 Substrate ◽  
Resonant Frequencies ◽  
Plate Waves ◽  
Interdigital Transducer

In this paper, the possibility to steer and confine live human cells by means of acoustic waves, such as flexural plate waves (FPWs), generated by piezoelectric actuators applied to non-piezoelectric substrates, has been explored. A device with two lead zirconate titanate (PZT) actuators with an interdigital transducer (IDT) screen-printed on an alumina (Al2O3) substrate has been fabricated and tested. The experimental results show that, by exciting the actuators at their resonant frequencies, FPW modes are generated in the substrate. By exploiting the device, arrangements of cells on lines at frequency-dependent distances have been obtained. To maintain the alignment after switching off the actuator, cells were entrapped in a fibrin clot that was cultured for several days, enabling the formation of cellular patterns.

Lead Zirconate Titanate Nanotube Composite for Ultrasound Transducer Application

2013 ◽  
Author(s):  
Guitao Zhang ◽  
Weihe Xu ◽  
Yong Shi
Keyword(s):  
Lead Zirconate Titanate ◽  
Wave Length ◽  
Sol Gel ◽  
Active Material ◽  
Hysteresis Loops ◽  
Lead Zirconate ◽  
Anodic Process ◽  
Ultrasound Transducer ◽  
Aao Template ◽  
Zirconate Titanate

Lead Zirconate Titanate (PbZr1−xTixO3, PZT) is a high performance piezoelectric material which is widely used for making ultrasound transducers. However, pure PZT suffered from high acoustic impedance and crosstalk effect, which deteriorate their performances. To solve these problems, people developed micro fiber PZT composite. As restricted by the fabrication method, like dicing, the size of PZT micro fibers are usually on the order of 10s micros. In this paper, we are going to introduce a PZT nanotube composite, in which the size of active material is on the order of nanometers. To fabricate the PZT nanotube composite, we used a template assistant method. First an anodic aluminum oxide (AAO) template was made by two step anodic process. Then PZT nanotube composite was made by wetting the AAO template with PZT sol-gel. Following, top and bottom electrodes were made by silver paste. After fabrication, hysteresis loops were measured to verify the piezoelectricity property of this nanotube composite. Then the impedance of the composite transducer was measured by a network analyzer. Resonant frequency of the transducer was found by the impedance data. This nanotube composite based transducer could theoretically reduce or even eliminate the crosstalk effect, since the diameter of nanotube is much smaller than half wave length of ultrasound. So an improved performance of PZT nanotube composite based ultrasound transducer could be expected.

scholarly journals Optimization in the Design and Fabrication of a PZT Piezoelectric Micromachined Ultrasound Transducer (PMUT)

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 743 ◽  
Author(s):  
Sina Sadeghpour ◽  
Robert Puers
Keyword(s):  
Crystal Structure ◽  
Lead Zirconate Titanate ◽  
Crystal Orientation ◽  
Bending Moment ◽  
Lead Zirconate ◽  
Ultrasound Transducer ◽  
Columnar Crystal ◽  
Zirconate Titanate

This paper presents an optimized way of lead zirconate titanate (PZT) deposition in orderto selectively grow three different (100/001), (110), and (111) crystal orientation in two differentthickness ranges, thinner and thicker than 400 nm. The thickness of the PZT layer is also optimizedto not diminish the generated bending moment more than 10%. A 1μm PZT layer with (100/001)dominant crystal orientation and highly columnar crystal structure is deposited and used in thefabrication of a circular PMUT. The PMUT has a 410 μm diameter and resonates at 462 kHz withthe displacement of 1200 nm/V.

Convergent-bceam diffraction studies on lead zirconate titanate Ceramics

1986 ◽  
Vol 44 ◽  
pp. 482-483
Author(s):  
M.L.A. Dass ◽  
T.A. Bielicki ◽  
G. Thomas ◽  
T. Yamamoto ◽  
K. Okazaki
Keyword(s):  
Lead Zirconate Titanate ◽  
Direct Proof ◽  
Lead Zirconate ◽  
Subsolidus Phase ◽  
Pzt Ceramics ◽  
Subsolidus Phase Diagram ◽  
Zirconate Titanate ◽  
Two Phases ◽  
Cbd Method ◽  
Titanate Ceramics

Lead zirconate titanate, Pb(Zr,Ti)O3 (PZT), ceramics are ferroelectrics formed as solid solutions between ferroelectric PbTiO3 and ant iferroelectric PbZrO3. The subsolidus phase diagram is shown in figure 1. PZT transforms between the Ti-rich tetragonal (T) and the Zr-rich rhombohedral (R) phases at a composition which is nearly independent of temperature. This phenomenon is called morphotropism, and the boundary between the two phases is known as the morphotropic phase boundary (MPB). The excellent piezoelectric and dielectric properties occurring at this composition are believed to.be due to the coexistence of T and R phases, which results in easy poling (i.e. orientation of individual grain polarizations in the direction of an applied electric field). However, there is little direct proof of the coexistence of the two phases at the MPB, possibly because of the difficulty of distinguishing between them. In this investigation a CBD method was found which would successfully differentiate between the phases, and this was applied to confirm the coexistence of the two phases.

Fabrication of Bimorph Lead Zirconate Titanate Thick Films on Metal Substrates Via the Cold Sintering Process

2020 ◽  
Author(s):  
Dixiong Wang ◽  
Sinan Dursun ◽  
Lisheng Gao ◽  
Carl S. Morandi ◽  
Clive A. Randall ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Thick Films ◽  
Lead Zirconate ◽  
Sintering Process ◽  
Metal Substrates ◽  
Zirconate Titanate
Sign in / Sign up

Export Citation Format

Share Document