| 학회 |
한국재료학회 |
| 학술대회 |
2014년 봄 (05/15 ~ 05/16, 창원컨벤션센터) |
| 권호 |
20권 1호 |
| 발표분야 |
A. 전자/반도체 재료(Electronic and Semiconductor Materials) |
| 제목 |
Temperature dependent Polarization response of lead-free (Na,K)(Nb,Ta)O3 ceramics |
| 초록 |
In the past two decades, to replace lead-based piezoelectric materials, many lead-free candidate materials were studied. Among them, (Na0.5K0.5)NbO3 based ceramics are considered most promising candidate materials for lead-free piezoelectric and ferroelectric applications. Ta modified NKN ceramics show high piezoelectric constants at morphotropic phase boundary (MPB) and polymorphic phase transition (PPT). However, NKNT ceramics have the problem that cannot make the high density ceramics due to volatility of A-site ions during the sintering process. To solve this problem, recently, we studied the A-site non stoichiometry effects of NKNT ceramics, which show enhanced piezoelectric and dielectric properties with d33=340pC/N. In this study, we studied the ferroelectric response at different temperatures and fields to further investigate the polarization properties of NKNT ceramics. |
| 저자 |
Sangyun Lim1, Jinsoo Kim2, Myongho Kim3
|
| 소속 |
1School of Advanced Materials Engineering, 2Changwon National Univ., 3Gyeongnam 641-773 |
| 키워드 |
NKN; lead-free; piezoelectric; polarization
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| E-Mail |
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