Advantages & Disadvantages of 1-3 Piezoelectric Composite Materials
He-Shuai Ltd
Your future is created by what you do today,not tomorrow ! Mainly offer : piezoelectric ceramic , piezo stacks.
Advantages of 1-3 Piezoelectric Composite Materials
The advantages of piezoelectric composite materials over ordinary piezoelectric ceramics typically include:
(1) Weak lateral vibrations, resulting in low crosstalk sound pressure;
(2) Low mechanical quality factor Q;
(3) Large bandwidth (80%-100%);
(4) High electromechanical coupling coefficient;
(5) High sensitivity, with a better signal-to-noise ratio than standard PZT probes;
(6) Stable characteristics over a wide temperature range;
(7) Ability to process complex probe shapes using simple cutting and filling techniques;
(8) Ease of changing parameters such as sound velocity, acoustic impedance, relative permittivity, and electromechanical coefficients (as these parameters are related to the volume ratio of ceramic material);
(9) Ease of matching with materials of different acoustic impedances (from water to steel);
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(10) Ability to adjust ultrasonic sensitivity through changes in the ceramic volume ratio.
Disadvantages of 1-3 Piezoelectric Composite Materials
Compared to ordinary piezoelectric ceramic components, the disadvantages of piezoelectric composite materials typically include higher costs and limited working temperature ranges. The fabrication process of piezoelectric composite materials is relatively complex, and the differences in volume fractions and structures of the two-phase materials for different application fields can lead to performance variations. Therefore, it is necessary to find the optimal material parameter values for each field to achieve optimal material performance. Furthermore, the materials can easily deform under external forces or heating, which can severely affect the associated acoustic radiation characteristics. At the same time, the presence of non-conductive polymers in the structure makes it challenging to draw out electrodes, which also restricts its application.
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HE SHUAI team
2024/08/29