• Title/Summary/Keyword: 1-3 type piezocomposite

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Optimization of 1-3 Type Piezocomposite Structures Considering Inter-Pillar Vibration Modes (Inter-Pillar 진동 모드를 고려한 1-3형 압전복합체의 구조 최적화)

  • Pyo, Seonghun;Kim, Jinwook;Roh, Yongrae
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.6
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    • pp.434-440
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    • 2013
  • With polymer properties and ceramic volume fraction as design variables, the optimal structure of 1-3 piezocomposites has been determined to maximize the thickness mode electromechanical coupling factor. When the piezocomposite vibrates in a thickness mode, inter-pillar resonant modes are likely to occur between lattice-structured piezoceramic pillars and polymer matrix, which significantly deteriorates the performance of the piezocomposite. In this work, a new method to design the structure of the 1-3 type piezocomposite is proposed to maximize the thickness mode electromechanical coupling factor while preventing the occurrence of the inter-pillar modes. Genetic algorithm was used for the optimal design, and the finite element analysis method was used for the analysis of the inter-pillar mode.

Optimization of 1-3 Piezoelectric Composites Considering Transmitting and Receiving Sensitivity of Underwater Acoustic Transducers (수중 음향 트랜스듀서의 송수신 감도를 고려한 1-3형 압전복합체의 구조 최적화)

  • Lee, Jaeyoung;Pyo, Seonghun;Roh, Yongrae
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.11
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    • pp.790-800
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    • 2013
  • The optimal structure of 1-3 piezocomposites has been determined by controlling polymer properties, ceramic volume fraction, thickness of composite and aspect ratio of the composite to maximize the TVR (transmitting voltage response), RVS (receiving voltage sensitivity) and FBW (fractional bandwidth) of underwater acoustic transducers. Influence of the design variables on the transducer performance was analyzed with equivalent circuits and the finite element method. When the piezocomposite is vibrating in a pure thickness mode, inter-pillar resonant modes are likely to occur between lattice-structured piezoceramic pillars and polymer matrix, which significantly deteriorate the performance of the piezocomposite. In this work, a new method to design the structure of the 1~3 type piezocomposite was proposed to maximize the TVR, RVS and FBW while preventing the occurrence of the inter-pillar modes. Genetic algorithm was used in the optimal design.

Material Properties Evaluation of 1-3 type Piezo-composite Fabricated with Ceramic Injection Molding Technology (세라믹 사출성형기술로 제조한 1-3형 압전복합체의 물성 평가)

  • Shin, H.Y.;Kim, J.H.;Lim, S.J.;Im, J.I.
    • Journal of the Korean Ceramic Society
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    • v.48 no.6
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    • pp.648-653
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    • 2011
  • Generally the piezo-composites have superior hydrostatic response characteristics than PZT ceramics due to both the stress amplification effect in axial direction and stress reduction effects in radial direction. This paper described material properties of a 1-3 type piezo-composite that fabricated with ceramic injection molding (CIM) technology. The electro-mechanical performances of the composite have been analyzed using FEM and the physical properties of the composite have been measured with the vol% of the PZT ceramics. Based on the results, the $k_t$ increased rapidly as the vol% of the PZT ceramics increased up to 30 vol% and saturated the constant value in the above region. Also the experimental results have good agreement with the simulation values of the composite. Finally we developed the composites having high piezoelectric properties than the PZT ceramics with the CIM technology.