Focusing ultrasonic transducer and producing method thereof

An ultrasonic transducer, ultrasonic technology, applied in the direction of fluid using vibration, etc., can solve the problems of difficult application of new piezoelectric single crystals, easy brittle cracking, reduced performance of piezoelectric vibrators, etc., and achieves simple structure, low cost, and improved quality effect

Inactive Publication Date: 2013-04-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, new piezoelectric single crystal materials (such as PMNT, PIMNT single crystal) are prone to brittle structures, and the planar piezoelectric vibrators cut out cannot obtain focused piezoelectric vibrators by simply applying external forces. In addition, the performance of crystal materials shows Anisotropy, the focused single crystal piezoelectric vibrator can be obtained by grinding...

Method used

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  • Focusing ultrasonic transducer and producing method thereof
  • Focusing ultrasonic transducer and producing method thereof
  • Focusing ultrasonic transducer and producing method thereof

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Embodiment Construction

[0029] Such as figure 1 As shown, from top to bottom are the outer matching layer 1, the inner matching layer 2, and the piezoelectric vibrator layer 3. The outer matching layer 1 is directly cured by epoxy resin with low acoustic impedance. The inner matching layer 2 is made by mixing epoxy resin and fillers (such as tungsten powder, zirconia ceramic powder, etc.) according to certain acoustic impedance requirements. The piezoelectric vibrator layer 3 is made of a new piezoelectric single crystal / polymer 1-3 composite material, such as PMNT{(1-x)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -xPbTiO 3}Single crystal material, grown by the improved Bridgman method, the orientation is , and the composition is 0.20≤x≤0.40; the new piezoelectric single crystal can also be PIMNT{xPb(In 1 / 2 Nb 1 / 2 )O 3 -yPb(Mg 1 / 3 Nb 2 / 3 )O 3 -(1-x-y)PbTiO 3}Single crystal material, the orientation is , the composition is 0.20≤x≤0.40 and 0.20≤y≤0.40. The piezoelectric single crystal / polymer 1-3 ...

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Abstract

The invention discloses a focusing ultrasonic transducer which sequentially comprises a matching layer, a piezoelectric vibrator layer and a backing block. The piezoelectric vibrator layer is made of a piezoelectric single crystal/polymer 1-3 composite material; the piezoelectric single crystal is lead magnesium niobate-lead titanate with a chemical composition of (1-x) Pb (mg1/3Nb2/3) O3-xPbTiO3, the crystallographic direction is the (001) direction; or a lead indium niobate-lead magnesium niobate-lead titanate with a chemical composition of xPb (In1/2Nb1/2) O3-yPb (Mg1/3Nb2/3) O3- (1-x-y) PbTiO3, the crystallographic direction is the (001) direction; wherein 0<x<1, 0<y<1, and 0<x+y<1. The focusing ultrasonic transducer is simple in structure, convenient to prepare and low in manufacturing cost, can obtain high sensitivity, bandwidth and resolution ratio, and has a broad application prospect in the technical fields of medical ultrasonic imaging and industrial nondestructive testing.

Description

technical field [0001] The invention relates to a focused ultrasonic transducer and a preparation method thereof. Background technique [0002] Ultrasonic transducer is a key component of ultrasonic imaging and ultrasonic detection systems, which realizes the conversion between electrical energy and acoustic energy (mechanical energy). In medicine, ultrasonic transducers are often called probes. Piezoelectric materials are the transducing elements of ultrasonic transducers, which are crucial to the performance of ultrasonic transducers and even the performance of the entire ultrasonic imaging system. In the past few decades, there have been many improvements and enhancements in the structural design of ultrasonic transducers, but PZT-based piezoelectric ceramics have always been used as transducer materials. This is due to the good piezoelectricity of PZT ceramics. Performance, on the other hand, is due to the low production cost of PZT ceramics and the ease of mass product...

Claims

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Application Information

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IPC IPC(8): B06B1/06
Inventor 王威罗豪甦赵祥永岳晴雯任博李晓兵徐海清林迪狄文宁王西安王升邓昊陈建伟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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