[Invited] Texturation of lead-free BaTiO<sub>3</sub> based piezoelectric ceramics
[Invited]
Type de document :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes: Conférence invitée
Titre :
[Invited] Texturation of lead-free BaTiO<sub>3</sub> based piezoelectric ceramics
[Invited]
[Invited]
Auteur(s) :
Marchet, Pascal [Auteur]
IRCER - Axe 3 : organisation structurale multiéchelle des matériaux [IRCER-AXE3]
Prato, Angel [Auteur]
Institut de Recherche sur les CERamiques [IRCER]
Levassort, Franck [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Bantignies, Claire [Auteur]
Vermon S.A.
Borta-Boyon, Ana [Auteur]
Thales Research and Technology [Palaiseau]
Hladky, Anne-Christine [Auteur]
Centre National de la Recherche Scientifique [CNRS]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Acoustique - IEMN [ACOUSTIQUE - IEMN]
IRCER - Axe 3 : organisation structurale multiéchelle des matériaux [IRCER-AXE3]
Prato, Angel [Auteur]
Institut de Recherche sur les CERamiques [IRCER]
Levassort, Franck [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Bantignies, Claire [Auteur]
Vermon S.A.
Borta-Boyon, Ana [Auteur]
Thales Research and Technology [Palaiseau]
Hladky, Anne-Christine [Auteur]
Centre National de la Recherche Scientifique [CNRS]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Acoustique - IEMN [ACOUSTIQUE - IEMN]
Titre de la manifestation scientifique :
95th Deutsche Keramische Gesellschaft Annual Meeting, CERAMICS 2020
Ville :
Jülich
Pays :
Allemagne
Date de début de la manifestation scientifique :
2020-11-22
Date de publication :
2020
Discipline(s) HAL :
Sciences de l'ingénieur [physics]
Résumé en anglais : [en]
Piezoelectric ceramics have been integrated for a long time in a widerange of devices, particularly in ultrasonic applications (sonar systems,medical imaging...) and most of them use Pb(Zr,Ti)O<sub>3</sub> (PZT) ...
Lire la suite >Piezoelectric ceramics have been integrated for a long time in a widerange of devices, particularly in ultrasonic applications (sonar systems,medical imaging...) and most of them use Pb(Zr,Ti)O<sub>3</sub> (PZT) materials.However, due to health care and environmental problems, lead contentmust be reduced in such applications. Among the few lead-freematerials families which can be considered for the replacement of PZT,BaTiO<sub>3</sub> appear as interesting because of its piezoelectric properties atroom temperature and capacity to be modulated by doping, even ifCurie temperature is not very high (120°C).</br>However, ceramics are generally limited by their isotropic nature. Forthis reason, texturing process was developed in order toimprove/optimize their electromechanical properties. The aim of thepresent study is thus to obtain textured BaTiO<sub>3</sub> based materials byusing the templated grain growth process (TGG) and to measure theirpiezoelectric properties.</br>Doped and undoped BaTiO<sub>3</sub> powders were prepared by classical solidstate route while BaTiO<sub>3</sub> templates were elaborated by a molten saltsprocess. Green ceramics were then obtained by tapecasting of a slurrycontaining templates and matrix particles dispersed in theappropriated solvent. After drying, green sheet was cut, stacked,pressed and then sintered at the appropriated temperature, in order toobtain thick or thin samples. This process allowed obtaining highlyorientedmaterials (texturation degree 70% to 90%). Piezoelectricproperties were investigated, for doped and undoped samples, and fordifferent sintering parameters. Some samples appears as veryinteresting for piezoelectric applications with d33* higher than 300 pC/N, against 180 pC/N for BaTiO<sub>3</sub> ceramics obtained by classical way.Lire moins >
Lire la suite >Piezoelectric ceramics have been integrated for a long time in a widerange of devices, particularly in ultrasonic applications (sonar systems,medical imaging...) and most of them use Pb(Zr,Ti)O<sub>3</sub> (PZT) materials.However, due to health care and environmental problems, lead contentmust be reduced in such applications. Among the few lead-freematerials families which can be considered for the replacement of PZT,BaTiO<sub>3</sub> appear as interesting because of its piezoelectric properties atroom temperature and capacity to be modulated by doping, even ifCurie temperature is not very high (120°C).</br>However, ceramics are generally limited by their isotropic nature. Forthis reason, texturing process was developed in order toimprove/optimize their electromechanical properties. The aim of thepresent study is thus to obtain textured BaTiO<sub>3</sub> based materials byusing the templated grain growth process (TGG) and to measure theirpiezoelectric properties.</br>Doped and undoped BaTiO<sub>3</sub> powders were prepared by classical solidstate route while BaTiO<sub>3</sub> templates were elaborated by a molten saltsprocess. Green ceramics were then obtained by tapecasting of a slurrycontaining templates and matrix particles dispersed in theappropriated solvent. After drying, green sheet was cut, stacked,pressed and then sintered at the appropriated temperature, in order toobtain thick or thin samples. This process allowed obtaining highlyorientedmaterials (texturation degree 70% to 90%). Piezoelectricproperties were investigated, for doped and undoped samples, and fordifferent sintering parameters. Some samples appears as veryinteresting for piezoelectric applications with d33* higher than 300 pC/N, against 180 pC/N for BaTiO<sub>3</sub> ceramics obtained by classical way.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Commentaire :
oral invité
Source :