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

Wave absorbing agent and preparation method thereof

A wave-absorbing agent and solvent technology, which is applied in the field of wave-absorbing materials, can solve problems such as cumbersome process steps, poor wave-absorbing performance, and poor wave-absorbing performance, and achieve simple process, significant low-frequency effect, and good low-frequency wave-absorbing performance Effect

Pending Publication Date: 2019-06-04
LUOYANG INST OF CUTTING EDGE TECH +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a preparation method of a composite electromagnetic absorbing material is disclosed in the prior art, which uses carbonyl iron powder and nano BaTiO 3 As raw materials, through high-energy ball milling method, heat treatment surface oxidation treatment, and nano-BaTiO 3 Mechanical mixing to produce composite powder, but this process is a high-energy ball milling method, which has low efficiency in industrial production, high equipment requirements, cumbersome process steps, and poor microwave absorption performance, especially in low-frequency bands. And the frequency band is narrow

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
  • Wave absorbing agent and preparation method thereof
  • Wave absorbing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The invention provides a wave absorbing agent and a preparation method thereof, the method comprising the following steps:

[0027] Add 100-300 parts of sendust particles to 300-400 parts of absolute ethanol, stir evenly and put them into a horizontal planetary ball mill for ball milling (that is, wet milling in a ball mill tank), the speed of ball milling is 300-450r / min, and the time of ball milling is 12-18h; wherein, the mass ratio of agate beads used in ball milling to sendust particles is 8-15:0.5-1.5, and agate beads are made of diameters of 10mm, 6mm, 3mm large, medium and small agate beads, the mass ratio of large, medium and small agate beads is 2-5:25-40:50-70. After the ball milling is completed, the slurry is taken out and dried at 40-80° C. for 5-8 hours to obtain a ball-milled powder of sendust with a thickness of about 0.5-1.5 μm.

[0028] Mix 20-50 parts of coupling agent and 4-10 parts of calcium stearate evenly, then add to absolute ethanol, isopropa...

Embodiment 1

[0031] Add 100 parts of sendust particles to 300 parts of absolute ethanol, stir evenly and put it into a horizontal planetary ball mill for ball milling (that is, wet milling in a ball milling tank), the speed of ball milling is 400r / min , the time of ball milling is 15h; Wherein, the mass ratio of the agate beads used in the ball milling and sendust particles is 8:1, agate beads are made up of three kinds of agate beads with diameters of 10mm, 6mm, 3mm, large, medium and small, The mass ratio of large, medium and small agate beads is 3:35:60. After the ball milling is completed, the slurry is taken out, heated and dried at 60° C. for 7 hours, and a ball milled powder of sendust with a thickness of about 1 μm is obtained.

[0032] Mix 30 parts of coupling agent KH550 and 7 parts of calcium stearate evenly, then add them into absolute ethanol solution, and then adjust the pH value to 4-6 by adding acetic acid to form a mixed solution; then mix 50 parts of iron silicon Add alu...

Embodiment 2

[0034] Add 220 parts of sendust particles to 350 parts of absolute ethanol, stir evenly and put it into a horizontal planetary ball mill for ball milling (that is, wet milling in a ball mill tank), the speed of ball milling is 350r / min , the time of ball milling is 15h; Wherein, the mass ratio of the agate beads used in the ball milling and sendust particles is 10:1, and the agate beads are composed of three kinds of agate beads with diameters of 10mm, 6mm and 3mm, large, medium and small, The mass ratio of large, medium and small agate beads is 3:25:50. After the ball milling is completed, the slurry is taken out and dried at 70° C. for 6 hours to obtain a ball milling powder of sendust with a thickness of about 0.8 μm.

[0035] Mix 45 parts of coupling agent A-1120 and 8 parts of calcium stearate evenly, then add it to the isopropanol solution, and then adjust the pH value to 4-6 by adding dilute hydrochloric acid with a mass fraction lower than 20%, Form a mixed solution; ...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a wave absorbing agent and a preparation method thereof. The method comprises the following steps that ball milling is performed on iron-silicon-aluminum alloy particles to obtain ball-milled powder of the iron-silicon-aluminum alloy; a mixture of a coupling agent and calcium stearate is added in a solvent, and the pH value is adjusted to form a mixed solution; and the ball-milled powder of the iron-silicon-aluminum alloy is added into the mixed solution, stirring, cleaning and drying are performed to obtain the wave absorbing agent. The wave absorbing agent prepared bythe method is remarkable in wave absorbing effect in a low-frequency band, and the wave absorbing frequency width is effectively improved.

Description

technical field [0001] The present invention relates to a wave absorbing material, in particular to a wave absorbing agent and a preparation method thereof. Background technique [0002] Researches in biology and medicine at home and abroad have shown that electromagnetic radiation in the 0.5-3GHz frequency band can cause biological damage to the human body through thermal effects, non-thermal effects, and cumulative effects. Electromagnetic pollution that affects human health in daily life mainly includes TV broadcasting transmission systems, radio frequency and microwave treatment equipment, microwave ovens, etc. The operating frequencies of these equipment are all in the low frequency band of 1-4GHz. In addition, the problem of electromagnetic wave interference generated by electromagnetic wave communication with a frequency of 1-3GHz is also becoming more and more serious, such as causing radio and TV signals to be unable to receive normally; electromagnetic radiation ge...

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
IPC IPC(8): B22F1/00B22F1/02H05K9/00
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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