• Title/Summary/Keyword: PMN-PZT

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High $T_c/E_c$ PMN-PZT Single Crystals for Piezoelectric Actuator and Transducer Applications : Bridgman PMN-PT Crystals vs. SSCG PMN-PZT Crystals (압전 액츄에이터와 트랜스듀서용 고효율 압전 PMN-PZT 단결정 개발 : 브릿지만법 PMN-PT 단결정과 고상단결정 성장법 PMN-PZT 단결정 비교)

  • Lee, Ho-Yong;Lee, Sung-Min;Kim, Dong-Ho
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.06a
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    • pp.17-17
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    • 2009
  • Piezoelectric single crystals in the ternary MPB PMN-PZ-PT system with high $T_cs$ ($T_c$ > $200\sim300^{\circ}C$) and $E_cs$($E_c$>5~10 kV/cm) were fabricated by the cost-effective solid-state crystal growth (SSCG) technique. Chemically uniform PMN-PZT single crystals were successfully grown up to 60 mm by the SSCG method and their dielectric and piezoelectric properties characterized. Compared to Bridgman PMN-PT single crystals, the high $T_c/E_c$ PMN-PZT single crystals were found to exhibit a much wider usage range with respect to electric field as well as temperature, and thus become best candidates for medical transducers, actuators, and naval applications.

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Characteristics of Piezoelectric Transformer Using PMS-PZT, PMN-PZT Ceramics (PMS-PZT, PMN-PZT계 세라믹스를 이용한 압전변압기의 특성)

  • 이동균;안형근;한득영;윤석진;김현재
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.13 no.3
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    • pp.220-226
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    • 2000
  • The piezoelectric material for piezoelectric transformer needs the high electromechanical coupling factor( $k_{p}$) the piezoelectric constant( $d_{33}$) and the mechanical quality factor( $Q_{m}$)in order to obtain high voltage step-up ratio and low temperature rising. In this study the piezoelectric transformers were fabricated using Pb[$Zr_{0.45}$/ $Ti_{0}$48//L $u_{0.02}$(M $n_{1}$3//S $b_{2}$3/)$_{0.05}$$O_3$(PMS-PZT) and Pb[Z $r_{0.25}$/ $Ti_{0.375}$(M $g_{1}$3//N $b_{2}$3/)$_{0.375}$$O_3$+0.5wt%Mn $O_2$(PMN-PZT) ceramics. The piezoelectric properties of PMS-PZT and PMN-PZT were measured. The voltage set-up ratios of the piezoelectric transformers using PMS-PZT and PMN-PZT were the value of 15, 20 respectively under 100$_{KΩ}$ in Rosen type transformer.r.ormer.r.r.r.r.r.r.

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Mn-Modified PMN-PZT [Pb(Mg1/3Nb2/3)O3-Pb(Zr,Ti)O3] Single Crystals for High Power Piezoelectric Transducers

  • Oh, Hyun-Taek;Lee, Jong-Yeb;Lee, Ho-Yong
    • Journal of the Korean Ceramic Society
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    • v.54 no.2
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    • pp.150-157
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    • 2017
  • Three types of piezoelectric single crystals [PMN-PT (Generation I $[Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3]$), PMN-PZT (Generation II $[Pb(Mg_{1/3}Nb_{2/3})O_3-Pb(Zr,Ti)O_3]$), PMN-PZT-Mn (Generation III)] were grown by the solid-state single crystal growth (SSCG) method, and their dielectric and piezoelectric properties were measured and compared. Compared to (001) PMN-PT and PMN-PZT single crystals, the (001) PMN-PZT-Mn single crystals exhibited a higher transition temperature between the rhombohedral and tetragonal phases ($T_{RT}=144^{\circ}C$), as well as a higher coercive electric field ($E_C=6.3kV/cm$) and internal bias field ($E_I=1.6kV/cm$). The (011) PMN-PZT-Mn single crystals showed the highest coercive electric field ($E_C=7.0kV/cm$), and the highest stability of $E_C$ and $E_I$ during 60 cycles of polarization measurement. These results demonstrate that both Mn doping (for higher electromechanical quality factor ($Q_m$)) and a (011) crystallographic orientation (for higher coercive electric field and stability) are necessary for high power transducer applications of these piezoelectric single crystals. Specifically, the (011) PMN-PZT-Mn single crystal (Gen. III) had the highest potential for application in the fields of SONAR transducers, high intensity focused ultrasound (HIFU), ultrasonic motors, and others.

Performance Characteristics of Vibration Energy Harvesting Using [001] and [011]-Poled PMN-PZT Single Crystals ([001] 및 [011] 방향 분극의 압전 단결정 PMN-PZT를 이용한 진동 에너지 수확 특성)

  • Kim, Jae Eun;Kim, Young-Cheol;Sun, Kyung Ho
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.24 no.11
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    • pp.890-897
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    • 2014
  • This work investigated the electromechanical performance of a cantilevered vibration energy harvester incorporating the single crystal PMN-PZT, manufactured with the most recent technology of solid-state single crystal growth. The performances of single crystal PMN-PZTs with two different crystallographic axes such as [011] and [001] are compared with those of PZT ceramics. From the investigations, it is shown that the [001]-poled PMN-PZT is advantageous for the excitations containing single dominant frequency component, while the single crystal [011]-$d_{32}$ is superior in terms of the energy storage density and energy conversion efficiency.

Effect of the Electrode Type on the Dielectric and Piezoelectric Properties of Piezoelectric PMN-PZT Single Crystals (압전 PMN-PZT 단결정의 유전 및 압전 특성에 미치는 전극 종류의 영향)

  • Lee, Jong-Yeb;Oh, Hyun-Taek;Choi, Kyoon;Lee, Ho-Yong
    • Journal of the Korean Ceramic Society
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    • v.52 no.1
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    • pp.77-82
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    • 2015
  • The effect of the electrode type on the dielectric and piezoelectric properties of $Pb(Mg_{1/3}Nb_{2/3})O_3-PbZrO_3-PbTiO_3$ (PMN-PZT) single crystals was investigated in an effort to improve their properties for various piezoelectric applications. First, three different types of PMN-PZT single crystals [PMN-PZT-A (piezoelectrically soft type; dielectric constant ~ 10,000), PMN-PZT-B (piezoelectrically soft type; phase-transition temperature between the rhombohedral and tetragonal phases ($T_{RT}$) ~ $145^{\circ}C$), PMN-PZT-C (piezoelectrically hard type; high mechanical quality factor ($Q_m$) ~ 1,000)] were fabricated using the solid-state single crystal growth (SSCG) method. Then, four different types of electrodes [sputtered Au, sputtered Cr/Au, sputtered Ti/Au, and fired Ag] were formed on the single crystals, and their dielectric and piezoelectric properties were measured. The single crystals with a sputtered Ti/Au electrode showed the highest dielectric and piezoelectric constants but the lowest coercive electric field ($E_C$). The single crystals with a fired Ag electrode showed the lowest dielectric and piezoelectric constants but the highest coercive electric field ($E_C$). This dependence on the type of electrode was most significant in the piezoelectrically hard PMN-PZT-C single crystals. However, the effects of the electrode type on the phase transition temperatures ($T_C$, $T_{RT}$) and dielectric loss were negligible. These results clearly demonstrate that it is important to select an appropriate electrode so as to maximize the dielectric and piezoelectric properties of single crystals in each type of piezoelectric application.

Effects of MnO2on the Piezoelectric Properties of PMN-PZT-based Ceramics (PMN-PZT계 세라믹스의 압전특성에 미치는 MnO2의 영향)

  • Kim J.-C;Hwang D.-Y;Lee M.-Y;You S.-W;Kim Y.-M;Ur S.-C;Kim I.-H
    • Korean Journal of Materials Research
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    • v.14 no.5
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    • pp.334-337
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    • 2004
  • Perovskite PMN-PZT-based ceramics were prepared and the$ MnO_2$ doping effects on their piezoelectric properties were investigated. Grain size decreased with increasing the $MnO_2$ content, and the pyrochlore phase was not identified in the sintered PMN-PZT ceramics with 0.01~1.0wt% $MnO_2$. Piezoelectric voltage and charge constants were reduced and mechanical quality factor increased with increasing the $MnO_2$ content. However, electromechanical coupling coefficient slightly decreased with increasing the MnO$_2$ content without regard to the grain size.

Effect of ZnO on Low Temperature Sintering of PMN-PNN-PZT Ceramics (ZnO가 PMN-PNN-PZT 세라믹스의 저온소결에 미치는 영향)

  • Lee, Sang-Ho;Yoo, Ju-Hyun;Hong, Jae-Il;Ryu, Sung-Lim
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.11a
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    • pp.32-33
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    • 2006
  • In this study, in order to develop multilayer ceramic actuator for ultrasonic nozzle and ultrasonic vibrator, PMN-PNN-PZT ceramics were fabricated using $Li_2CO_3$. $Na_2CO_3$ and ZnO as sintering aids. And then, their piezoelectric and dielectric properties according to the amount of ZnO addition were investigated. The addition of ZnO improved density, dielectric constant, electromechanical coupling factor, mechanical quality factor and piezoelectric d constant of PMN-PNN-PZT ceramics due to the increase of sinterability and accepter doping effect. Electromechanical coupling factor and mechanical quality factor of PMN-PNN-PZT ceramics increased with ZnO amount up to 0.4wt% and then decreased. At the sintering temperature of $900^{\circ}C$ and 0.4wt% ZnO addition, density, dielectric constant, electromechanical coupling factor, mechanical quality factor and piezoelectric d constant showed the optimum value of 7.876g/$cm^2$, 1299, 0.612, 1151 and 369pC/N, respectively.

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Fabrication and Characterization of PMN-PZT Thick Films Prepared by Screen Printing Method (Screen Printing법을 이용한 PMN-PZT 후막의 제조 및 특성 연구)

  • 김상종;최형욱;백동수;최지원;김태송;윤석진;김현재
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.13 no.11
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    • pp.921-925
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    • 2000
  • Characteristics of Pb(Mg, Nb)O$_3$-Pb(Zr, Ti)O$_3$system thick films fabricated by a screen printing method were investigated. The buffer layer were coated with various thickness of Ag-Pd by screen printing to investigate the effect as a diffusion barrier and deposited Pt as a electrode by sputtering on Ag-Pb layer. The printed thick films were burned out at 650$\^{C}$ and sintered at 950$\^{C}$ in O$_2$condition for each 20, 60min after printing with 350mesh screen. The thickness of piezoelectric thick film was 15∼20㎛ and Ag-Pb layer acted as a diffusion barrier above 3㎛ thickness. The PMN-PZT thick films were screen printed on Pt/Ag-Pb(6m) and sintered by 2nd step (650$\^{C}$/20min and 950$\^{C}$/1h) using paste mixed PMN-PZT and binder in the ratio of 70:30, and the remnant polarization of thick film was 9.1$\mu$C/㎠ in this conditions.

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Fabrication and Characteristics of Piezoelectric transformer using PMN-PZT (PMN-PZT 세라믹을 사용한 압전트랜스포머 제작과 특성)

  • 류주현;손은영;류규현;윤현상;정희승
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1997.11a
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    • pp.13-20
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    • 1997
  • In this paper, the voltage step-up ratio, efficiency and input impedance of the PMN-PZT cert- mic transformer(PT) were investigated for the variation of resonant frequency according to lead resistance. The output voltage and voltage step-up ratio are increased with the the increase of load resistance. The efficiency of PT showed the maxinum value of 91% at R$_{L}$ of 500k$\Omega$X>

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The Electrical Properties of Multilayer Piezoelectric Transformer using PZN-PMN-PZT ceramics (PZN-PMN-PZT 세라믹스를 이용한 적층 압전변압기의 전기적 특성)

  • Kim, Kook-Jin;Lee, Chang-Bae;Yoo, Ju-Hyun;Paik, Dong-Soo;Yoon, Hyun-Sang
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.06a
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    • pp.301-303
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    • 2006
  • In this study, multilayer piezoelectric transformer were manufactured using the PZN-PMN-PZT ceramic and then the electrical characteristics were investigated. The voltage step-up ratio of multilayer piezoelectric transformer showed the maximum value in the vicinity of 78.16kHz and increased according to the increase of load resistance. When the output impedance coincided with the load resistance, piezoelectric transformer showed the temperature increase of about $20^{\circ}C$ at the output power of 12W. The results, the multilayer transformer manufactured using the low temperature sintered PZN-PMN-PZT ceramics can be stably driven for step-up transformers.

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