BISMUTH-CONTAINING PIEZOELECTRIC COMPOSITION AND PIEZOELECTRIC DEVICE

BISMUTH-CONTAINING PIEZOELECTRIC COMPOSITION AND PIEZOELECTRIC DEVICE

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TERANISHI, Keisuke, ISHIZAKI, Makoto, KITAZAKI, Masashi
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
ELECTRICITY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung: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.