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A kind of fe/zrh2 nanocrystalline composite particle and its preparation method and application

A nanocrystalline composite and nanocrystalline technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex magnetic permeability decrease, complex permittivity increase, etc., and achieve improvement Electromagnetic properties, guaranteed temperature resistance and electromagnetic properties, simple preparation process

Active Publication Date: 2022-01-04
武汉双虎涂料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

figure 2 Indicates the electromagnetic parameters of carbonyl iron powder at room temperature and after vacuum heat treatment at 500°C for 1h. We can see that the complex permittivity increases significantly, and the complex permeability decreases significantly.

Method used

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  • A kind of fe/zrh2 nanocrystalline composite particle and its preparation method and application
  • A kind of fe/zrh2 nanocrystalline composite particle and its preparation method and application
  • A kind of fe/zrh2 nanocrystalline composite particle and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] a Fe / ZrH 2 Nanocrystalline composite particle, its preparation method comprises the steps:

[0049] 1) 19.4g carbonyl iron powder and 0.6g ZrH 2 powder into the ball mill jar (ZrH 2 The mass fraction of particles in the composite powder is 3wt.%), weigh 10mm and 6mm stainless steel grinding balls according to the ball-to-material ratio of 20:1, and the ratio of large and small balls is 3:2; then add 10ml of analytically pure n-hexane As a dispersant; set the ball mill to the forward and reverse alternate mode, the cycle of each rotation is 5h, stop for 20min in the middle, set the ball milling time to 80h, and the speed to 260rpm / min; after the ball milling is completed, use a 300-mesh sieve to separate the balls with powder;

[0050] 2) Take 10g of the powder obtained in step 1), weigh zirconia balls with a diameter of 6mm at a mass ratio of 80:1 (ball-to-material ratio), put the powder and balls into a grinding tank, and add 100ml of ethanol to it As the grinding ...

Embodiment 2

[0059] a Fe / ZrH 2 Nanocrystalline composite particle, its preparation method comprises the steps:

[0060] 1) 18.4g carbonyl iron powder and 1.6g ZrH 2 powder into the ball mill jar (ZrH 2 The mass fraction of particles in the composite powder is 8wt.%), weigh 10mm and 6mm stainless steel grinding balls according to the ball-to-material ratio of 20:1, and the ratio of large and small balls is 3:2; then add 10ml of analytically pure n-hexane As a dispersant; set the ball mill to the forward and reverse alternate mode, the cycle of each rotation is 5h, stop for 20min in the middle, set the ball milling time to 100h, and the speed to 240rpm / min; after the ball milling is completed, use a 300-mesh sieve to separate the balls with powder;

[0061] 2) Take 10g of the powder obtained in step 1), weigh zirconia balls with a diameter of 6mm at a mass ratio of 80:1 (ball-to-material ratio), put the powder and balls into a grinding tank, and add 100ml of ethanol to it As a grinding m...

Embodiment 3

[0066] a Fe / ZrH 2 Nanocrystalline composite particle, its preparation method comprises the steps:

[0067] 1) 19g carbonyl iron powder and 1g ZrH 2 powder into the ball mill jar (ZrH 2 The mass fraction of the particles in the composite powder is 5 wt.%), weigh 10mm and 6mm stainless steel grinding balls according to the ball-to-material ratio of 20:1, and the ratio of large and small balls is 3:2; then add 15ml of analytically pure alkanes as a dispersant; set the ball mill to the forward and reverse alternating mode, the cycle of each rotation is 5h, stop for 20min in the middle, set the ball milling time to 60h, and the speed to 250rpm / min; after the ball milling is completed, use a 300-mesh sieve to separate balls and powder;

[0068] 2) Take 10g of the powder obtained in step 1), weigh zirconia balls with a diameter of 6mm at a mass ratio of 80:1 (ball-to-material ratio), put the powder and balls into a grinding tank, and add 100ml of ethanol to it As the grinding med...

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Abstract

The invention discloses a Fe / ZrH 2 Nanocrystalline composite particles, which are composed of carbonyl iron powder and ZrH 2 Particles are the main raw material, which is easily prepared by ball milling + stirring milling. The present invention works by combining ZrH 2 The stabilization of particles on the microscopic grain boundaries of carbonyl iron powder, the control technology of Zr element content and the control technology of Zr distribution, to obtain Fe / ZrH with temperature resistance 2 composite particles; the Fe / ZrH 2 After heat treatment at 500 °C for 1 h, the grain size of the composite particles is within 20 nm, the electromagnetic parameters of 2-18 GHz do not change significantly, and the composite particles have good temperature resistance.

Description

technical field [0001] The invention belongs to the field of electronic materials, in particular to a Fe / ZrH 2 Nanocrystalline composite particle and its preparation method and application. Background technique [0002] Microwave absorbing materials are widely used in military stealth, electromagnetic shielding and human body safety protection because they can absorb and attenuate incident electromagnetic waves and convert them into heat energy for loss. With the development of military technology, the temperature of the surface skin of the aircraft can reach more than 300°C during flight, and the temperature near the tailpipe of the engine can reach more than 500°C. Therefore, heat-resistant wave-absorbing materials are of great significance to maintain the stealth performance of the aircraft under working conditions. [0003] The currently developed heat-resistant absorbing materials are divided into dielectric loss heat-resistant wave absorbing materials and magnetic lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04B82Y30/00B82Y40/00
CPCB22F9/04B82Y30/00B82Y40/00B22F2009/043B22F1/054
Inventor 官建国王彦淇陈志宏李维赵素玲
Owner 武汉双虎涂料股份有限公司
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