Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lightweight composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material and lightweight technology, applied in the field of wave-absorbing materials, can solve problems such as narrow particle size range, no public performance values, and high temperature conditions, and achieve high reflection loss, light weight, and excellent high-frequency magnetic properties. Effect

Pending Publication Date: 2020-09-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF12 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this patented technology is that the preparation method requires high temperature conditions, and the applicable particle size range is narrow
In addition, although the patented technology discloses that the obtained hollow composite microspheres can be used as light electromagnetic wave absorbers, it does not disclose any performance values

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lightweight composite wave-absorbing material and preparation method thereof
  • Lightweight composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of substrate

[0037] At room temperature, add 52 parts of deionized water (solvent) to 28 parts of polyvinyl alcohol (PVA, binder), and stir until the two are completely dissolved and dispersed; then add 4.5 parts of hollow glass microspheres. Stir and disperse the binder and the microspheres in a solvent to form a light matrix solution.

[0038] As a comparison, also weigh 50 parts of paraffin (conventional binder), put it into a beaker, add 32 parts of hexane (solvent), stir evenly to dissolve it completely.

[0039] (2) Preparation of composite materials

[0040] Weigh two parts of spherical carbonyl iron powder according to 10% volume fraction (the volume fraction of spherical carbonyl iron powder in the composite wave-absorbing material), add the two solutions as in (1) above, and stir evenly to make the carbonyl iron powder Disperse evenly, and dry at normal temperature and atmospheric pressure for 12-24 hours until solidification, and then 10vo...

Embodiment 2

[0043] (1) Preparation of substrate

[0044]At room temperature, add 46 parts of acetone (solvent) to 24 parts of epoxy resin (binder), stir evenly until the two are completely dissolved and dispersed; then add 8 parts of hollow carbon microspheres. Stir and disperse the binder and the microspheres in a solvent to form a light matrix solution.

[0045] As a comparison, also weigh 50 parts of paraffin (conventional binder), put it into a beaker, add 32 parts of hexane (solvent), stir evenly to dissolve it completely.

[0046] (2) Preparation of composite materials

[0047] According to the ratio of 10vol.% (the volume fraction of the iron-nickel alloy powder in the composite wave-absorbing material), two parts of the iron-nickel alloy powder were weighed and added to the two solutions described in (1), and stirred evenly to make the iron-nickel alloy The powder is evenly dispersed in it, and after thermal curing (40-60°C) and atmospheric curing at room temperature, 10vol.% Fe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lightweight composite wave-absorbing material and a preparation method thereof. The lightweight composite wave-absorbing material comprises magnetic powder and a lightweightmatrix, the lightweight matrix is formed by compounding microspheres with a hollow structure and a binder, and the magnetic powder is dispersed among the microspheres. The preparation method comprisesthe following steps: (1) preparing a lightweight matrix solution, namely uniformly mixing and stirring a solvent and a binder until the solvent and the binder are completely dispersed, and then adding microspheres; uniformly stirring and dispersing the binder and the microspheres in a solvent to form a light matrix solution; and (2) preparing the light composite wave-absorbing material: adding magnetic powder into the lightweight matrix solution obtained in the step (1), stirring to uniformly disperse the magnetic powder, and curing to remove the solvent to obtain the lightweight composite wave-absorbing material.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a lightweight composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the advancement of electronic information technology, all kinds of electronic equipment are used in all aspects of people's life. On the one hand, it facilitates people's life. On the other hand, the electromagnetic pollution generated by electronic equipment also affects people's health. In addition, the advancement of military radar communication has also greatly promoted the development of stealth aircraft. Therefore, electromagnetic wave absorbing materials have broad application prospects, both in life and in military affairs. Due to the single use of electromagnetic wave absorbers and wave-absorbing mechanisms, it is difficult for existing electromagnetic wave absorbing materials to achieve broadband and efficient absorption of electromagnet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 谭果果康宜宇满其奎宁明强娄雅馨陈淑文
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com