Bismut-Haltige Piezoelektrische Zusammensetzung und Piezoelektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP3372571

Aktenzeichen

EP18160508

Anmeldetag

7. März 2018

Veröffentlichung

13. November 2019

Erteilung

13. November 2019

Rechtsraum

EP

IPC

C04B35/26H01L41/187

Abstract

A piezoelectric composition 2 comprises a plurality of crystal particles 4, wherein the piezoelectric composition 2 includes bismuth, iron, barium, titanium, and oxygen; the crystal particle 4 include a core 6 and a shell 8 having a contents of bismuth higher than that in the core 6 and covering the core 6; and the total area of the cross sections of the cores 6 exposed to the cross section 2cs of the piezoelectric composition 2 is expressed as S<CORE>, the total area of the cross sections of the shells 8 exposed to the cross section 2cs of the piezoelectric composition 2 is expressed as S<SHELL>, and 100·S<CORE>/(S<CORE>+ S<SHELL>) is 50 to 90.

Anmelder

Firma

TDK Corporation

Land

🇯🇵 Japan

Fachgebiete