Novel piezoelectric composite material
A piezoelectric composite material, a new type of technology, applied in the field of piezoelectric composite materials, can solve the problems of less research, achieve the effect of simplifying the preparation process and overcoming preparation difficulties
Active Publication Date: 2012-08-01
TIANJIN UNIV
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Problems solved by technology
At present, more researches are mainly on 1-3, 0-3, 2-2 type piezoelectric / polymer composite materials, and there are relatively few studies on 2-3, 1-1, 3-2 type composite methods.
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Embodiment Construction
[0022] The schematic plan view of the composite material product (uncoated electrode) of the new connection type of the present invention is as figure 1 As shown, it consists of a helical ceramic phase 1 and a matrix phase epoxy resin 2.
[0023] In the process of the present invention, it is determined that 0.25PZN-0.75PLZT is the ceramic phase, the sintering temperature is 1230°C, and the volume percentage of the ceramic phase is 75%; the polarization condition is 80°C of silicon oil temperature, the polarization electric field is 1KV / mm, and the polarization is 10min, and the obtained The performance test results are listed in Table 1.
[0024] Table 1
[0025]
[0026] The composite piezoelectric material prepared by applying the invention can be widely used in electronic devices such as ultrasonic sensors and underwater acoustic detectors, or medical image detection systems and the like.
[0027] The above description of the embodiments is to facilitate the understan...
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Abstract
The invention discloses a novel piezoelectric composite material, which comprises a piezoelectric ceramic phase and a polymer matrix phase, wherein the ceramic phase is helical, and the piezoelectric composite material which is in a helical parallel connection is obtained after the ceramic phase is composited with polymer. The ceramic phase is formed into a helical shape through a roll forming and crimping forming technology or a mechanical stamping and laser cutting method, then the ceramic phase is composited with the polymer, and the piezoelectric composite material is obtained after polishing, electrode coating and polarization. The piezoelectric composite material in a novel connection mode eliminates the defect of the prior art that 1-3 type ceramic phases are difficult to produce, simplifies a producing method and has excellent piezoelectric properties and underwater acoustic properties. The novel piezoelectric composite material is mainly applied to fields of hydrophones, intelligence sensors, medical ultrasound and the like.
Description
technical field [0001] The present invention relates to piezoelectric composite materials, in particular to a new type of piezoelectric composite material which uses a spiral ceramic phase as a supporting phase and is compounded with a polymer phase and its preparation method. Background technique [0002] Piezoelectric composite material is a new type of material developed in the past 30 years. It is widely used in hydrophones, pulse-echo transducers, ultrasonic imaging systems, smart sensors, medical ultrasound, acceleration sensors, vibration and noise control, etc. field. [0003] Composite piezoelectric materials are composed of piezoelectric ceramics and polymer polymers according to a certain connection method, a certain volume or mass ratio, and a certain spatial geometric distribution. The way in which the composite phases in a piezoelectric composite are connected determines the overall properties of the composite. Its piezoelectric, dielectric, mechanical qualit...
Claims
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IPC IPC(8): H01L41/18H01L41/22H10N30/85H10N30/01H10N30/092
Inventor 马卫兵赵海芳张林孙清池
Owner TIANJIN UNIV