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

Metal powder and preparation and application thereof

A metal powder, metal micropowder technology, applied in the field of materials, can solve the problem of not being able to cover the X-band

Active Publication Date: 2017-02-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF9 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing X-band absorbing materials are difficult to meet the application requirements of simple preparation, thin layer, light weight, broadband and high efficiency at the same time, especially its -10dB effective bandwidth cannot cover the entire X-band

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
  • Metal powder and preparation and application thereof
  • Metal powder and preparation and application thereof
  • Metal powder and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0108] The present invention also provides a method for preparing the metal powder, the method comprising the following steps:

[0109] 1) providing a mixture comprising Fe, M and R according to the atomic number ratio of the metal powder;

[0110] 2) melting the mixture described in step 1) under the protection of an inert gas to obtain an alloy comprising Fe, M and R;

[0111] 3) pulverizing the alloy obtained in step 2) to obtain metal fine powder comprising Fe, M and R;

[0112] 4) Optionally nitriding the metal fine powder obtained in step 3) to obtain the metal powder.

[0113] In another preferred example, M and R are as defined above.

[0114] In another preferred embodiment, the inert gas is selected from the group consisting of Ar, H 2 , He, Ne, Kr, or combinations thereof.

[0115] In another preferred example, the number of smelting is 1-10 times, preferably 2-5 times.

[0116] In another preferred embodiment, the crushing includes the following steps:

[011...

Embodiment 1

[0190] Example 1Fe 72 co 10 Ce 5 PR 5 N 8 Metal powder 1-1, styrene-butadiene rubber and copper foil composite absorbing material 1

[0191] Weigh Ce, Pr, Fe and Co elements according to the alloy ratio, melt them into a master alloy under the protection of an inert gas (such as Ar, He, Ne and / or Kr), and use a melt rapid quenching method to obtain a quenched alloy strip. The linear speed of melt quenching is 10 m / s;

[0192] After coarse crushing, the quick-quenched strip is ground into powder by ball milling. The ball mill is wet-milled by adding isopropanol and phthalate coupling agent. hour, obtain a metal powder 1 with a particle size of less than 4 microns;

[0193] Put the ball-milled metal powder 1 in a high-pressure reactor for nitriding, pressurize pure nitrogen to 5MPa, control the temperature at 350°C, and control the time for 2 hours to ensure the formation of a single soft magnetic nitriding phase to obtain metal powder 1-1, the particle size is about 3.5 ...

Embodiment 2

[0200] Example 2Fe 2 co 89 PR 3 Y 3 Nd 3 Wave-absorbing material composed of metal micropowder 2, TPU and graphene conductive film 2

[0201] Weigh Pr, Y, Nd, Fe and Co elements according to the alloy ratio, melt them into a master alloy under the protection of an inert gas (such as Ar, He, Ne and / or Kr), and use the melt rapid quenching method to obtain a quenched alloy strip material, the linear speed of melt quenching is 20 m / s;

[0202] After coarse crushing, the quick-quenched strip is ground into powder by ball milling. The ball mill is wet-milled by adding isopropanol and phthalate coupling agent. hours, the metal micropowder 2 with a particle size of less than 4 microns is obtained, and its particle size is about 3.5 microns;

[0203] Mix TPU, acetone and toluene, and mix them into a wave-absorbing slurry according to the weight ratio of TPU and metal micropowder 2 at a ratio of 1:3.5. After the slurry is stirred evenly, it is poured into the casting feeding tank...

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
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to metal powder and preparation and application thereof. Specifically, the metal powder has the components as shown in formula I, wherein M, R, a, b and c are defined according to the specification; and, the particle size of the metal powder is smaller than or equal to 8 microns. The invention further discloses the preparation and the application of the metal powder. The metal powder is especially suitable for preparing a wave-absorbing material, and the obtained wave-absorbing material can achieve complete covering of X wave bands under -10 dB. Thus, the waver-absorbing material can fully meet the application requirements of military use and civil use X wave band wave-absorbing materials for communication, radar detection and the like, and has wide market application prospect. FeMaRbNc is the formula I.

Description

technical field [0001] The invention relates to the field of materials, in particular to a metal powder and its preparation and application. Background technique [0002] With the development of mobile communication, radar communication and detection technology, and the extensive use of various high-frequency electronic devices, the electromagnetic environment is becoming increasingly complex. In order to solve the problems of electromagnetic wave radiation interference, information leakage and electromagnetic pollution, it is of great significance to use wave-absorbing materials to convert electromagnetic wave energy into other forms of energy or suppress electromagnetic wave radiation and interference through the interference and cancellation of electromagnetic waves. Absorbing materials can effectively suppress electromagnetic noise, and can also be used to reduce the reflection of radar waves and the interference of radar signals to airborne equipment. It has broad appli...

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): B22F1/00B22F7/04H05K9/00
CPCB22F1/0003H05K9/0088B22F7/04B22F1/145B22F1/10
Inventor 满其奎顾习胜李发伸车声雷常春涛王新敏李润伟
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