Properties of Step-down Multilayer Piezo Stack Transformers Using PNN-PMN-PZT Ceramics with CeO2 Addition
In order to fabricate multilayer piezo stack transformers, we investigated the influences of the sintering temperature and the dielectric and piezoelectric properties of Pb(Ni1/3Nb2/3)-Pb (Mn1/3Nb2/3)-Pb(Zr0.505Ti0.495)O3 (PNN-PMN-PZT) ceramics with CeO2 additives due to their effects of grain growth suppression. Meanwhile, the effects of CeO2 additives on the microstructure and the electrical properties of PNN-PMN-PZT were investigated in detail. In addition, multilayer piezo stack transformers with the composition of PNN-PMNPZT were fabricated, and the characteristics were measured for various load resistances at resonance frequency. The voltage step-up ratio was continuously changed with increasing input voltage and load resistance. The output voltages and powers were increased with increasing input voltage at matching impedance. The temperature rise of the multilayer piezo stack transformer increased with increasing input voltage and load resistance. These results indicate that the optimized properties of ceramics, d33 = 274 pC/N, Kp = 0.55, Qm = 2581, ∈r = 1474, density = 7.899 g/cm3, and tan<5 = 0.0031, were obtained at a sintering temperature of 1250 ℃. Meanwhile, multilayer piezo stack transformers a sintered at 1250 ℃ showed favorable characteristics with a power of 5 W at 150 Ω.
PNN-PMN-PZT Step-down Multilayer Piezo stack transformer CeO2
Insung Kim Minsoo Kim Soonjong Jeong Jaesung SONG Hyeonkyu Joo Vo Viet Thang Alexandra Muller
Battery and Piezoelectric Research Center, KERI, Changwon 641-130, Korea Department of Energy Conversion, University of Science and Technology, Daejeon 305-333, Korea National Institute for Research and Development in Microtechnologies, Romania
国际会议
首尔
英文
580-584
2010-02-07（万方平台首次上网日期，不代表论文的发表时间）