| 학회 |
한국재료학회 |
| 학술대회 |
2009년 봄 (05/21 ~ 05/22, 무주리조트) |
| 권호 |
15권 1호 |
| 발표분야 |
전자재료 |
| 제목 |
Structural and piezoelectric properties of lead-free (1-x)(Na0.5 K0.5)NbO3-xBa(Ti0.9,Sn0.1)O3 ceramics |
| 초록 |
Lead-free (1-x)(Na0.5K0.5)NbO3 - xBa(Ti0.9Sn0.1)O3 [NKN-BTS-100x] ceramics doped with 1 mol% MnO2 have been prepared by the conventional solid state method and their structural and piezoelectric properties were investigated. The NKN-BTS-100x ceramics exhibited a dense and homogeneous microstructure when they were sintered at 1030-1150oC. Grain growth was observed for the specimen sintered at relatively low temperature of 1050oC. A tetragonal/orthorhombic morphotropic phase boundary (MPB) in the perovskite structure was also appeared for the NKN-BTS-100x ceramics (0.04＜x＜0.07) sintered at 1050oC. The enhanced piezoelectric properties in the NKN-BTS ceramics with a MPB composition were obtained. Especially, for the NKN-BTS-6 ceramics, a high dielectric constant (εT3/εo=1,400), piezoelectric constant (d33=237) and electromechanical coupling factor (kp=0.42) were obtained. |
| 저자 |
차유정1, 남산2, 김창일1, 정영훈2, 이영진2, 백종후2
|
| 소속 |
1고려대, 2요업기술원 |
| 키워드 |
Lead-free piezoelectric ceramics; morphotropic phase boundary (MPB); lead free relaxors
|
| E-Mail |
|
