Lead-free piezoelectric ceramic composition and preparation method thereof

The present invention provides lead-free piezoelectric ceramic composition, and a preparation method thereof. According to the present invention, the lead-free piezoelectric ceramic composition has a structure in which the bismuth-based ferroelectric particles represented by any one selected from a...

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Hauptverfasser: HOANG THIEN KHOI NGUYEN, KIM, SEONG DEOK, KANG, JIN KYU, LEE, CHANG HEON, LEE, JAE SHIN, THI HINH DINH, TRANG AN DUONG, JEONG, SOON JONG, CHO, JEONG HO
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention provides lead-free piezoelectric ceramic composition, and a preparation method thereof. According to the present invention, the lead-free piezoelectric ceramic composition has a structure in which the bismuth-based ferroelectric particles represented by any one selected from a group consisting of chemical formula 3 or 5 is dispersed in a specific content range in the bismuth-based ferroelectric particles represented by chemical formula 1 or 2 bismuth-based ferroelectric so as to be environmentally friendly due to excluding a lead. The present invention has an excellent electric field organic variation ratio in low electric field condition of 4 kV/mm or less, thereby being used in various fields of piezoelectric applications in which piezoelectric materials are used. 본 발명은 무연 압전 세라믹 조성물 및 이의 제조방법에 관한 것이다. 본 발명에 따른 무연 압전 세라믹 조성물은 화학식 1 또는 2로 표현되는 비스무스계 완화형 강유전체에 화학식 3 내지 5로 이루어진 군에서 선택되는 어느 하나로 표현되는 비스무스계 강유전체 입자가 특정 함량 범위로 분산된 구조를 가짐으로써 납을 포함하지 않아 환경친화적일 뿐만 아니라, 실용 범위인 4 kV/mm 이하의 낮은 전계 조건에서도 전계유기 변형률이 우수하므로 압전 소재가 사용되는 다양한 분야의 압전 응용 소자에 유용하게 사용될 수 있다.