Multiphase composite decoupling material and preparation method thereof

A technology of decoupling materials and flexible materials, applied in the field of composite materials, can solve problems such as lowering resonance frequency and failing to meet needs

Active Publication Date: 2014-02-26
武汉国科舰航传感科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with the continuous increase of the transmitting power of the transducer and the decrease of the resonance frequency, the existing two-phase composite decoupling material composed of flexible rubber and additives can no longer meet the needs

Method used

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  • Multiphase composite decoupling material and preparation method thereof
  • Multiphase composite decoupling material and preparation method thereof
  • Multiphase composite decoupling material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The structure of the multiphase composite decoupling material in this embodiment is as follows figure 1 As shown, it consists of flexible materials 1 (such as polyurethane, rubber, epoxy resin, etc.), heavy particles (tungsten powder, titanium powder, barium sulfate particles, etc.) and light particles (alumina, nickel powder, etc.) 2, hollow glass Microbeads 3 constitute. The multiphase composite decoupling material is completed by infusion process. First of all, according to the properties of the composite material required by the actual application, design the mass percentage of each phase material in the composite material, accurately weigh each component according to this percentage, mix all the added materials except the flexible material, and stir evenly in the same direction with a stirring rod 3 minutes to mix well. Prepare a flexible material (such as polyurethane), add an appropriate amount of flexible material to a three-necked bottle in a constant tempera...

Embodiment 2

[0024] The structure of the multiphase composite decoupling material in this embodiment is as follows figure 2 As shown, it includes flexible material 1 (such as polyurethane, rubber, epoxy resin, etc.), thin sheet 4 made of heavy particles (tungsten powder, titanium powder, barium sulfate particles, etc.), and hollow glass microspheres 3. The preparation method of the multiphase composite decoupling material is the same as that in Example 1. The sheet 4 composed of heavy particles is composed of heavy particles (such as tungsten powder) with a mass percentage greater than 80% and flexible materials (such as epoxy resin), and its preparation process is similar to the preparation of multi-phase composite decoupling materials. , after curing, the whole composite material is cut into thin slices with a precision cutting machine, and these flakes are added to the flexible material as additives to form a multi-phase composite decoupling material, which is characterized by uneven d...

Embodiment 3

[0026] The structure of the multiphase composite decoupling material in this embodiment is as follows image 3 As shown, the thin sheet 4' composed of high-impedance heavy particles separates the decoupling material composed of flexible material 1, heavy and / or light particles 2 and hollow glass microspheres 3 into two parts. The composition and preparation of the sheet 4' composed of high-impedance heavy particles (tungsten powder, titanium powder, barium sulfate particles, etc.) are the same as in Example 2, and the decoupling material composed of low-impedance flexible materials and additives is the same as in Example 1. . In this case, when the sound wave is transmitted from a certain array element to an adjacent array element, it is firstly transmitted from the high impedance material of the element to the decoupling material, and attenuated by the scattering of hollow glass beads and particles in the low impedance flexible material. When the sound wave is transmitted fr...

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Abstract

The invention discloses a multiphase composite decoupling material and a preparation method of the multiphase composite decoupling material. The multiphase composite decoupling material comprises a flexible material and an additive added to the flexible material, wherein the flexible material is in a liquid state before being cured and has low Young modulus after being cured; the additive is selected from two or more of following materials: heavy particles, light particles, hollow glass beads and heavy slices; the density of the heavy particles is more than 10<4>kg / m<3>; the density of the light particles is 10<3>-10<4>kg / m<3>; and the heavy slices are obtained by compounding more than 80% of heavy particles and the flexible material. According to the invention, the three-phase or multiphase composite material is obtained by adding the hollow glass beads, the light particles and the heavy particles to the flexible material, and three methods of adsorption, scattering and attenuation and impedance mismatching are fully utilized to achieve decoupling aim.

Description

technical field [0001] The invention belongs to the field of composite materials, and specifically relates to a composite material prepared by using multi-phase materials to achieve the purpose of decoupling, which can be widely used in underwater acoustic transducer arrays, vibration isolation, sound absorption equipment, etc. composite material. Background technique [0002] The underwater acoustic transducer array is a device that converts sound energy and electrical energy into each other. Its status is similar to that of an antenna in radio equipment, and it is a key device for transmitting and receiving sound waves underwater. When one or several array elements of the underwater acoustic transducer array vibrate and emit acoustic signals, other array elements are used to receive feedback acoustic signals to achieve the purpose of underwater acoustic detection. Usually in such ultrasonic and underwater acoustic transducers that use piezoelectric materials as sensitive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L21/00C08L63/00C08K13/04C08K7/28C08K3/08C08K3/30C08K3/22
Inventor 秦雷王丽坤蔡大可路宇
Owner 武汉国科舰航传感科技有限公司
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