비납계 (Bi0.5Na0.5)(1-x)BaxTiO3 압전 세라믹 재료의 최적 조성

성연수; 여홍구; 조종호; 송태권; 정순종; 송재성; 김명호; Yeon-Soo Sung; Hong-Goo Yeo; Jong-Ho Cho; Tae-Kwon Song; Soon-Jong Jeong; Jae-Sung Song; Myong-Ho Kim

Korean Journal of Materials Research, Vol.17, No.2, 68-72, February, 2007

DOI10.3740/MRSK.2007.17.2.068 Export Citation

비납계 (Bi0.5Na0.5)(1-x)BaxTiO3 압전 세라믹 재료의 최적 조성

Optimum Compositions for Piezoelectric Properties of Pb-free (Bi0.5Na0.5)(1-x)BaxTiO3 Ceramics

성연수^†, 여홍구, 조종호, 송태권, 정순종¹, 송재성¹, 김명호²

창원대학교 나노신소재 공학부
¹한국전기연구원 전자기소자그룹
²한국전기연구원 나노신소재 공학부

Yeon-Soo Sung^†, Hong-Goo Yeo, Jong-Ho Cho, Tae-Kwon Song, Soon-Jong Jeong¹, Jae-Sung Song¹, and Myong-Ho Kim

School of Nano and Advanced Materials Engineering, Changwon National University, Gyoungsangnam-Do 641-773, Korea
¹Korea Electrotechnology Research Institute, Electric and Magnetic Devices Research Group, Changwon, Gyeongnam 641-120, Korea

E-mail:

Optimum compositions for piezoelectric properties of ceramics were investigated in the range of covering rhombohedral to tetragonal phase regions. No impurity phases other than a perovskite phase were found and the grain size decreased with increasing x. A two-phase coexisting morphotropic phase area rather than boundary dividing rhombohedral and tetragonal phase regions appeared to exist at . As for piezoelectric properties within morphotropic phase compositions, the piezoelectric constant () and the electromechanical coupling factor () showed peak values at x=0.065, 192 pC/N and 34%, respectively, indicating x=0.065 as an optimum composition for piezoelectric ceramics.

Keywords:Pb-free bismuth sodium barium titanate;Morphotropic phase composition

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[6] Hiruma Y, Aoyagi R, Nagata H, Takenaka T, Jpn. J. Appl. Phys., 44, 5040 (2005)

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[8] Qing X, Wu SJ, Chen ST, Wen C, Lee J, Jing Z, Sun HJ, Li YM, Mater. Res. Bull., 40(2), 373 (2005)

[9] Xu Q, Chen S, Chen W, Wu S, Lee J, Zhou J, Sun H, Li Y, J. Alloys Comp., 381, 221 (2004)

[10] Yilmaz H, Trolier-Mckinstry S, Messing GL, J. Electroceramics, 11, 217 (2003)

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[17] Takenaka T, Nagata H, J. Eur. Ceram. Soc., 25, 2693 (2005)

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[20] Lin D, Xiao D, Zhu J, Yu P, Appl. Phys. Lett., 88, 062901 (2006)

[21] Lin D, Xiao D, Zhu J, Yu P, Phys. Stat. Sol. A, 202, R89 (2005)