Lead-free piezoelectric materials and composites for high frequency medical ultrasound transducer applications

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F14%3APU110321" target="_blank" >RIV/00216305:26620/14:PU110321 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1109/ULTSYM.2014.0221" target="_blank" >http://dx.doi.org/10.1109/ULTSYM.2014.0221</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/ULTSYM.2014.0221" target="_blank" >10.1109/ULTSYM.2014.0221</a>

Result language
angličtina
Original language name
Lead-free piezoelectric materials and composites for high frequency medical ultrasound transducer applications
Original language description
Lead-free ceramics based on the (1-x)Ba(Zr0.2Ti0.8)O3- x(Ba0.7Ca0.3)TiO3 (BZT-BCT) system have been reported to exhibit piezoelectric properties comparable to lead zirconate titanate ceramics, and are thus being considered as replacement materials for some applications. In this work, the possibility of fabricating BZT-BCT based 1-3 piezocomposites for high frequency ultrasound imaging has been explored. An investigation of the interdependence of synthesis, processing and sintering conditions on the physical, structural, microstructural and functional properties of piezoelectric compositions in the BZT-BCT system has been carried out. Ceramic powders with a composition of 0.5BZT-0.5BCT and a particle size of 1 um were chosen for the fabrication of the ceramic segments which were subsequently sintered at 1425 C. A novel randomised pattern that has recently demonstrated its advantages in suppressing undesirable spurious resonances was adopted for the lead-free composites and a micro-moulding technique based on gel casting ceramic processing has been used for the fabrication of the composites. A 0.5BZT-0.5BCT based randomised composite operating at ~30 MHz with an electromechanical coupling factor of 0.63 has been achieved.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Ultrasonics Symposium (IUS), 2014 IEEE International
ISBN
978-1-4799-7049-0
ISSN
—
e-ISSN
—
Number of pages
4
Pages from-to
903-906
Publisher name
Neuveden
Place of publication
Neuveden
Event location
Chicago
Event date
Sep 3, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000352792500220

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