Abstract
With the increasing demand for energy exchangers in underwater acoustic equipment, a modified 1-3 piezoelectric composite material is fabricated based on three-component phases. The new material outperforms the traditional two-phase 1-3 structure. Flexible silicone rubber polymer strengthened the piezoelectric composite and the properties of modified 1-3 piezoelectric composite have been tested by method of finite element simulation and experiment, respectively. This modified material has a high electromechanical coupling coefficient; the maximum can reach 0.684 and −3 dB bandwidth is superior to the two-phase 1-3 type. At the same time, the modified phase 1-3 type structure has an excellent decoupling effect. Silicone rubber can reduce the negative coupling vibration of epoxy resin, the vibration model simplification of piezoelectric composite, and the result of the experiment and simulation has good consistency.
Highlights
Properties of 1-3 Type and Modified 1-3 Type Composites In Figure 6, the widths of the piezoelectric column in the modified 1-3 piezoelectric composite material, epoxy resin, and silicone rubber are set to 1 mm, b, and c, respectively
The admittance curve of piezoelectric composite is obtained through finite element simulation (Figure 7)
The admittance curve obtained through the experiment shows the resonance frequency of the composite, where the actual thickness electromechanical coupling coefficient can be analyzed
Summary
With the increasingly high requirement for information and intelligent technology, a great breakthrough has been made in material science, which is intelligent materials. The application of such materials has contributed to the development of modern intelligent instruments [1,2]. As functional materials applied in hydroacoustic sensing and image detection, 1-3 piezoelectric composites have become increasingly mature and play a central role in the sensitive elements of transducers [3]. Compared with conventional piezoelectric ceramic materials, they have better physical properties and development qualities, thereby attracting wide attention from scholars [4,5,6]. The early applications of piezoelectric materials were mostly in single crystals. Scientists were extremely enthusiastic about researching Rochelle salts
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