PIEZOELECTRIC ELEMENT AND PIEZOELECTRIC VIBRATOR HAVING THE SAME

Disclosed are a piezoelectric element and a piezoelectric transducer including the same. The piezoelectric element includes a piezoelectric body formed by laminating multiple ceramic layers; an internal electrode formed on the surface of each of the ceramic layers; and a pair of cover layers respect...

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Bibliographic Details
Main Authors KIM, BOUM SEOCK, KIM, KYUNG MI, KIM, KYUNG LOCK, LEE, SEUNG HO, SEO, JUNG WOOK
Format Patent
LanguageEnglish
Korean
Published 02.10.2015
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Summary:Disclosed are a piezoelectric element and a piezoelectric transducer including the same. The piezoelectric element includes a piezoelectric body formed by laminating multiple ceramic layers; an internal electrode formed on the surface of each of the ceramic layers; and a pair of cover layers respectively formed on the upper and lower parts of the piezoelectric body to protect the internal electrode. At least one of the cover layers includes: multiple crystal grains; and crack suppressing particles which are arranged on the boundaries of the crystal grains to prevent the cracks in the cover layers from spreading. 압전소자 및 이를 포함하는 압전진동자가 개시된다. 복수의 세라믹층이 적층되어 형성되는 압전체; 각각의 상기 세라믹층 표면에 형성되는 내부전극; 및 상기 내부전극을 보호하기 위하여 상기 압전체의 상하부에 각각 형성되는 한 쌍의 커버층을 포함하고, 적어도 하나의 상기 커버층은, 복수의 결정립; 및 복수의 상기 결정립 간의 경계에 배치되어 상기 커버층 내 크랙의 확산을 억제하는 크랙억제입자를 포함하는 것을 특징으로 하는 압전소자 및 이를 포함하는 압전진동자가 제공된다.
Bibliography:Application Number: KR20140034084