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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Ultrasonics Symposium (IUS), 2014 IEEE International

ISBN

978-1-4799-7049-0

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

903-906

Název nakladatele

Neuveden

Místo vydání

Neuveden

Místo konání akce

Chicago

Datum konání akce

3. 9. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000352792500220