0.96K0.5Na0.5NbO3-0.04SrTiO3 세라믹스의 상전이와 압전 특성에 대한 Li2CO3 도핑 효과 (Effect of Li2CO3 Doping on Phase Transition and Piezoelectric Properties of 0.96K0.5Na0.5NbO3-0.04SrTiO3 Ceramics)

서지정보

· 발행기관 : 한국전기전자재료학회
· 수록지 정보 : 전기전자재료학회논문지 / 36권 / 5호 / 513 ~ 519페이지
· 저자명 : 박재영, Trang An Duong, 이상섭, 안창원, 김병우, 한형수, 이재신

초록

It was reported that a tetragonal phase can be stabilized with maintaining good piezoelectric properties when Na0.5K0.5NbO3 (KNN) is modified with 0.06 mol SrTiO3. However, such a high amount of SrTiO3 leads not only to poor sinterability but low Curie temperature (TC). To maintain high TC with good piezoelectric properties in KNN-based lead-free piezoelectric ceramics, this study investigates the effect of Li-doping on the dielectric and piezoelectric properties of 0.96Na0.5K0.5NbO3–0.04SrTiO3 (KNN-4ST) ceramics. As a result, the orthorhombic-tetragonal phase transition was observed at 2 mol% Li2CO3 modified KNN-4ST ceramics, whose TC, d33 and kp values are 328℃, 165pC/N and 0.33, respectively.

영어초록

It was reported that a tetragonal phase can be stabilized with maintaining good piezoelectric properties when Na0.5K0.5NbO3 (KNN) is modified with 0.06 mol SrTiO3. However, such a high amount of SrTiO3 leads not only to poor sinterability but low Curie temperature (TC). To maintain high TC with good piezoelectric properties in KNN-based lead-free piezoelectric ceramics, this study investigates the effect of Li-doping on the dielectric and piezoelectric properties of 0.96Na0.5K0.5NbO3–0.04SrTiO3 (KNN-4ST) ceramics. As a result, the orthorhombic-tetragonal phase transition was observed at 2 mol% Li2CO3 modified KNN-4ST ceramics, whose TC, d33 and kp values are 328℃, 165pC/N and 0.33, respectively.

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