Piezoelectric vibrator preparation method and piezoelectric vibrator prepared thereby

Abstract

The invention relates to a piezoelectric vibrator preparation method and a piezoelectric vibrator prepared thereby. The piezoelectric vibrator is respectively provided with a plurality of first direction slots and a plurality of second direction slots vertical to the first direction slots in the lateral direction and the longitudinal direction, wherein the depth of the first direction slots and the second direction slots is less than the thickness of a piezoelectric bulk; the inside of the first direction slots and the second direction slots is filled with solidified polymers; the upper end surface and the lower end surface of the piezoelectric bulk are successively provided with piezoelectric thin strips and polymer thin strips at an interval in parallel; meanwhile, electrodes reserved by the upper layer of the piezoelectric thin strips and the lower layer of the piezoelectric thin strips can be directly subjected to lead welding so as to omit factors, such as the complex technology of preparing the electrode on the surface of the composite structure and instability; meanwhile, the piezoelectric vibrator has the advantages of low acoustic impedance and high electro-mechanical transformation performance of the common composite material, as well as high smoothness; and because of the support of the inner piezoelectric bulk of the piezoelectric vibrator, the piezoelectric vibrator is unlikely to deform if being heated and impacted by external force.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ultrasonic energy conversion, in particular to a preparation method of a piezoelectric vibrator. [0002] The invention also relates to a piezoelectric vibrator prepared by applying the piezoelectric vibrator preparation method. Background technique [0003] The piezoelectric vibrator is the key component of the piezoelectric ultrasonic transducer, and the piezoelectric ultrasonic transducer can generate and receive ultrasonic signals through the inverse piezoelectric effect and piezoelectric effect of the piezoelectric vibrator. In the prior art, the piezoelectric vibrator of type 1-3 composite structure has relatively excellent performance. Its basic structure is that piezoelectric ceramic columns or piezoelectric single crystal columns are arranged in a polymer matrix. The piezoelectric vibrator of this structure has excellent performance. Piezoelectric anisotropy, low acoustic impedance...

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Problems solved by technology

[0004]At present, there have been many technologies related to 1-3 composite structure piezoelectric vibrators developed and applied. However, the existing technologies generally require Electrodes are prepared on the surface of the electric vibrator. The composite structure piezoelectric vibrator is composed of inorganic non-metallic piezoelectric materials and organic polymer materials. On the surface of two materials with completely different properties, a metal electrode with good adhesion and uniformity is prepared at the same time. It has always been a difficult point in the process, and it is easy to cause process instability, which limits the application of 1-3 composite structures to a certain extent

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