| 학회 |
한국재료학회 |
| 학술대회 |
2012년 가을 (11/07 ~ 11/09, 라카이샌드파인 리조트) |
| 권호 |
18권 2호 |
| 발표분야 |
B. 나노재료(Nanomaterials) |
| 제목 |
The microstructure and piezoelectric/dielectric properties of (1-x)Pb(Zr0.53Ti0.47)O3–xBiYO3 ternary system |
| 초록 |
The structural and electrical properties of (1-x)Pb(Zr0.53Ti0.47)O3–xBiYO3 [(1-x)PZT-xBY)] ternary ceramic system with the composition near to the morphotropic phase boundary (MPB) were investigated. Initially the perovskite structure Pb(Zr0.53Ti0.47)O3 (PZT) and cubic phase BiYO3 (BY) powders are prepared by a mixed oxide method. (1-x)PZT-xBY (where x=0.00, 0.01, 0.02, 0.03, 0.04, 0.05) ceramic composites are then prepared from the PZT and BY powders by the mixed oxide method. X-ray diffraction analysis of sintered disks showed extra secondary phases for all the compositions containing BY this is composed of mainly Bi2O3. Scanning electron micrographs showed that the addition of BY inhibits grain growth and exhibited a microstructure that was denser and finer than that of undoped PZT. With only 1 mole% BY addition, 99.3% theoretical density was achieved after sintering at 1160ºC for 2h. The doping of BY on PZT system was found effective to maintaining a high Curie temperature of around 370ºC. Temperature behavior of piezoelectric parameters such as electromechanical coupling factor and P-E hysteresis measurements was also investigated. These parameters showed good temperature stability up to 220ºC for 1 mole% BY addition. All piezoelectric and dielectric properties of the doped samples were seen to increase sharply compare to undoped PZT. The optimal doping level was found to be at x=0.01. The new ternary system PZT-BY ceramics could be a promising field of research for high power piezoelectric applications. |
| 저자 |
Man-Soon Yoon1, Iqbal Mahmud2, Mobinul Islam3, Soon-Chul Ur4
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| 소속 |
1Ph D, 21Department of Materials Sci. and Eng./Research Center for Sustainable Eco-Devices and Materials (ReSEM), 3Korea National Univ. of Transportation, 4Chungju |
| 키워드 |
X-ray diffraction; scanning electron microscopy; piezoelectric; dielectric
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| E-Mail |
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