• Title/Summary/Keyword: Piezoelectric crystal PMN-PZT

Search Result 18, Processing Time 0.02 seconds

Modeling and Analysis of Ultrasonic Transducer with Single Crystal Piezoelectric Material (압전단결정을 이용한 초음파 탐촉자 모델링 및 해석)

  • Kwon, Byung-Jin
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2014.10a
    • /
    • pp.579-580
    • /
    • 2014
  • In this research, modeling and analysis of an ultrasonic transducer composed of single crystal piezoelectric material(PMN-28PT) are conducted with FEM in reference with that composed of piezoelectric ceramic(PZT-4). Acoustic performances of the ultrasonic transducer are compared with magnitude, phase of impedance and trasmitting voltage response according to the type of piezoelectric materials.

  • PDF

Study on Ultrasonic Transducer for Non-Destructive Evaluation of Highly Attenuative Material Using PMN-PT Single Crystal (PMN-PT 압전 단결정을 이용한 고감쇠 재료 비파괴 평가용 초음파 탐촉자 연구)

  • Kim, Ki-Bok;Ahn, Bong-Young;Kim, Young-Gil;Park, Sang-Ki;Ha, Jeong-Soo
    • Journal of the Korean Society for Nondestructive Testing
    • /
    • v.27 no.4
    • /
    • pp.313-320
    • /
    • 2007
  • Recently, a new class of single-crystal piezoelectric materials such as lead metanibobate doped with lead titanate (PMN-PT) has been synthesized and were found to further enhance the electro-mechanical coupling factor compared to piezo-ceramic materials. This paper describes fabrication and evaluation of PMN-PT single crystal ultrasonic transducers for contact measurement of stainless steel that is one of the highly attenuative materials. The design conditions for ultrasonic transducer such as front matching layer between test materials and piezo-material and backing materials were investigated based on the simulation results by KLM model. The PMN-PT single crystal ultrasonic transducers with centre frequencies at 1 and 2.25 MHz were fabricated and their performances were evaluated.

Fabrication of a PMN-PZT needle hydrophone for photoacoustic imaging (광음향 영상화를 위한 PMN-PZT 바늘형 수중청음기 제작)

  • Fan, Xiaofeng;Cao, Yonggang;Ha, Kanglyeol;Kim, Moojoon;Kang, Hyun Wook;Oh, Junghwan
    • The Journal of the Acoustical Society of Korea
    • /
    • v.35 no.3
    • /
    • pp.175-182
    • /
    • 2016
  • For application to several MHz photoacoustic imaging systems, a needle hydrophone was designed and fabricated by using PMN-PZT piezoelectric single crystal, and its characteristics were evaluated through comparison with a commercial PVDF(Polybinylidene Fluoride) hydrophone of which receiving sensitivity is known. The simulation using the KLM model results show that the peak receiving impulse response for $50{\Omega}$ terminating impedance of the fabricated hydrophone is -261.6 dB re $1V/{\mu}Pa$ and the frequency response is relatively flat over 2 ~ 12 MHz with fluctuation less than 5 dB. The measurement results using tone burst signals also show that it has higher (ave. 10.9 dB) sensitivity than the commercial hydrophone in 2 ~ 8 MHz, and the receiving sensitivity of $-255.8{\pm}2.8$ dB re $1V/{\mu}Pa$ was measured for the fabricated hydrophone. In addition, it is known that the photoacoustic signals and the image of a hair obtained by a mechanical scanned photoacoustic imaging system with the fabricated hydrophone were bigger and better than those obtained with the commercial hydrophone.

A Study on Piezoelectric Properties of PMN-PSS-PZT ceramics with Ni, Mn (Ni, Mn가 첨가된 PMN-PSS-PZT세라믹스의 압전 특성에 관한 연구)

  • Shin, Hyea-Kyoung;You, Sung-Gone;Bae, Seon-Gi
    • Proceedings of the KIEE Conference
    • /
    • 2004.07c
    • /
    • pp.1624-1626
    • /
    • 2004
  • This study was to measure the minuteness structure, piezoelectric properties of (0.3-x)PMN- xPSS -0.7PZT+0.5[wt%]NiO+0.5(wt%)$MnO_2$ (x=0.05, 0.10, 0.15, 0.20, 0.25)ceramics according to sintering temp- erature and PSS(mol%) after manufacturing the specimens with a general method. the results of this study were gotten such as follows. The crystal structure of ceramic has the rombohedral structure in XRD. It appeared that addition of Ni, Mn additive was helpful to the formation of stable structure. The electrome- chanical coupling coefficient(kp) showed good properites on the whole, showed its maximum value 25.94[%] in specimens sintered at 1100[$^{\circ}C$], x=0.25mol. The mechanical quality coefficient(Qm) showed its maximum value 272.42 in specimens sintered at 1150[$^{\circ}C$], x=0.05mol. and was decreased by increasing PSS[mol%] The temperature coefficient of the resonant frequency(TCFr) showed stable properties in all sintering temperature with x=0.05mol. Especially good stability of 0.0054[%/$^{\circ}C$] showed in specimens sintered at 1100$^{\circ}C$, x=0.05mol.

  • PDF

Piezoelectric and Dielectric Characteristics of Low Temperature Sintering Pb(Mg1/2W1/2)O3-Pb(Mn1/3Nb2/3)O3-Pb(Zr1/2Ti1/2)O3 Ceramics With the Substitution of Pb(Mg1/2W1/2)O3 (Pb(Mg1/2W1/2)O3 치환에 따른 저온소결 Pb(Mg1/2W1/2)O3-Pb(Mn1/3Nb2/3)O3-Pb(Zr1/2Ti1/2)O3 세라믹스의 압전 및 유전특성)

  • Yoo Ju-Hyun;Lee Hyun-Seok;Chung Kwang-Hyun;Jeong Yeong-Ho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.19 no.5
    • /
    • pp.417-421
    • /
    • 2006
  • In this study, in order to develop low temperature sintering piezoelectric ceramics for LTCC (Low-Temperature Cofired Ceramic) multilayer piezoelectric actuator, PMW-PMN-PZT ceramics using $0.2wt%\; Li_2CO_3$ and $0.25wt%\;CaCO_3$ as sintering aids were investigated according to the varation of PMW substution. Composition ceramics could be sintered at $900^{\circ}C$ by adding sintering aids. As the amount of PMW substitution increased, the crystal structure of PMW-PMN-PZT ceramics moved from tetragonal phase to rhombohedral phase gradually, and MPB(Morphotrophic Phase Boundary) region appeared at 2 mol% PMW substitution. At the sintering temperature of $900^{\circ}C$, the density, electromechanical coupling factor(kp), mechanical quality factor(Qm), dielectric constant(${\epsilon}r$), piezoelectric constant(d33) and Curie temperature(Tc) of 2 mol% PMW substituted PMW-PMN-PZT ceramics showed the optimal values of $7.88g/cm^3$, 0.58, 1002, 1264, 352 pC/N and $336^{\circ}C$, respectively, for LTCC multilayer piezoelectric actuator application.

Piezoelectric and Dielectric Characteristics of Low Temperature Sintering Pb(Mn1/3Nb2/3)O3-Pb(Ni1/3Nb2/3)O3-Pb(Zr1/2Ti1/2)O3 Ceramics according toPb(Ni1/3Nb2/3)O3 Substitution (Pb(Ni1/3Nb2/3)O3 치환에 따른 저온소결 Pb(Mn1/3Nb2/3)O3-Pb(Ni1/3Nb2/3)O3-Pb(Zr1/2Ti1/2)O3 세라믹스의 압전 및 유전 특성)

  • Yoo Ju-Hyun;Lee Sang-Ho;Paik Dong-Soo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.19 no.1
    • /
    • pp.35-39
    • /
    • 2006
  • In this study, in order to develop the multilayer piezoelectric actuator and ultrasonic resonator, PMN-PNN-PZT ceramics were fabricated by sintering with $Li_2CO_3-Na_2CO_3$ as sintering aids at $950^{\circ}C$ and their piezoelectric and dielectric characteristics were investigated as a function of PNN substitution. With increasing PNN substitution, dielectric constant(${\epsilon}_r$), electromechanical coupling factor(kp), and piezoelectric d constant($d_{33}$) were increased to $12 mol\%$ PNN substitution and then showed a tendency to decrease rapidly With increasing PNN substitution, crystal structure changed from tetragonal to rhombohedral at $12 mol\%$ PNN substitution and then secondary phase was appeared and its intensity was increased. At the $12 mol\%$ PNN substituted PMN-PZT composition ceramic sintered at $950^{\circ}C$, density, kp, $d_{33}$ and Qm showed the optimum value of $7.79 g/cm^3$, 0.599, 419 pC/N, and 894, respectively for multilayer piezoelectric actuator application.

Demonstration of Magnetoelectric Coupling Measurement at Off-Resonance and Resonance Conditions in Magnetoelectric Composites (자기전기복합체의 비공진 및 공진 상태에서의 자기전기 결합 특성 평가 방법)

  • Patil, Deepak Rajaram;Ryu, Jungho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.35 no.4
    • /
    • pp.333-341
    • /
    • 2022
  • Magnetoelectric (ME) composites are comprised of magnetostrictive and piezoelectric phases. Lots of theoretical and experimental works have been done on ME composites in the last couple of decades. The output performance of ME composites has been enhanced by optimizing the constituent phases, interface layer, dimensions of the ME composites, different operating modes, etc. However, the detailed information about the characterization of ME coupling in ME composites is not provided yet. Therefore, in this tutorial paper, we are giving an insight into the details of measurements of ME voltage coefficient of ME composites both at off-resonance and resonance conditions. A symmetric type Gelfenol/PMN-PZT/Gelfenol ME composites were fabricated by sandwiching (011) 32-mode PMN-PZT single crystal between two Galfenol plates by epoxy bonding are used for the example of ME coupling measurement. The details about the experimental setup used for the measurement of ME voltage coefficient are provided. Furthermore, a step-by-step measurement of ME voltage coefficient using computerized program is demonstrated. We believe the present experimental measurement details can help readers to understand the concept of ME coupling and its analysis.

Characteristics of Magnetoelectric Composite with Rosen Type Piezoelectric Transducer Structure (Rosen형 압전 변압기 구조를 적용한 자기-전기 복합체의 특성)

  • Park, Sung Hoon;Yoon, Woon-Ha;Patil, Deepak Rajaram;Ryu, Jungho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.34 no.6
    • /
    • pp.480-486
    • /
    • 2021
  • Magnetoelectric (ME) composite is composed of a piezoelectric material and a magnetostrictive material. Among various ME structures, 2-2 type layered ME composites are anticipated to be used as high-sensitivity magnetic field sensors and energy harvesting devices especially operating at its resonance modes. Rosen type piezoelectric transducer using piezoelectric material is known to amplify a small electrical input voltage to a large electrical output voltage. The output voltage of these Rosen type piezoelectric transducers can be further enhanced by modifying them into ME composite structures. Herein, we fabricated Rosen type ME composites by sandwiching Rosen type PMN-PZT single crystal between two Ni layers and studied their ME coupling. However, the voltage step-up ratio at the resonance frequency was found to be smaller than the value calculated with αME value. The ATILA FEA (Finite Elements Analysis) simulation results showed that the position of the nodal point was changed with the presence of a magnetostrictive layer. Thus, while designing a Rosen type ME composite with high performance in a resonant driving situation, it is necessary to optimize the position of the nodal point by optimizing the thickness or length of the magnetostrictive layer.