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Antioxidant absorbent and preparation method thereof

An absorbent and anti-oxidation technology, which is applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problems of low oxidation resistance of carbonyl iron powder, difficulty in resisting long-term high temperature application, and the coating layer is not dense enough. Achieving the effects of good anti-oxidation performance, reduced preparation cost, good temperature resistance and

Active Publication Date: 2020-02-21
XIAN AERONAUTICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide an anti-oxidation absorber to solve the problem of low oxidation resistance of the existing carbonyl iron powder, and the coating layer of the anti-oxidation absorber prepared by the existing method is not dense enough or uniform enough to be difficult Resistance to long term high temperature application issues
[0005] Another purpose of the embodiments of the present invention is to provide a method for preparing an anti-oxidation absorbent to solve the problems of complex processes and high costs in the existing preparation methods of anti-oxidation absorbents

Method used

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  • Antioxidant absorbent and preparation method thereof
  • Antioxidant absorbent and preparation method thereof
  • Antioxidant absorbent and preparation method thereof

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Effect test

Embodiment 1

[0051] This embodiment proposes an anti-oxidant carbonyl iron / aluminum mixed powder absorbent, which is composed of 91 wt.% carbonyl iron powder and 9 wt.% aluminum powder.

[0052] This embodiment also proposes a method for preparing the anti-oxidation carbonyl iron / aluminum mixed powder absorbent, the specific process is:

[0053] Step S1: Preparation of carbonyl iron / aluminum mixed powder with iron / aluminum alloy layer:

[0054] Step S11: Weigh 91wt.% of the carbonyl iron powder with an average particle size of 4μm and 9wt.% of the aluminum powder with an average particle size of 50nm according to the mass fraction to obtain a carbonyl iron / aluminum mixed powder, and put the carbonyl iron / aluminum mixed powder Put into the zirconia ball mill tank;

[0055] Step S12, adding zirconia grinding balls into the zirconia ball milling tank, and the mass ratio of the zirconia grinding balls to the carbonyl iron / aluminum mixed powder balls is 10:1;

[0056] Step S13, adding an appropriate amo...

Embodiment 2

[0065] This embodiment proposes an anti-oxidant carbonyl iron / aluminum mixed powder absorbent, which is composed of carbonyl iron powder with a mass fraction of 85 wt.% and aluminum powder with a mass fraction of 15 wt.%.

[0066] This embodiment also proposes a method for preparing the anti-oxidation carbonyl iron / aluminum mixed powder absorbent, the specific process is:

[0067] Step S1: Preparation of carbonyl iron / aluminum mixed powder with iron / aluminum alloy layer:

[0068] Step S11, weighing 85wt.% of carbonyl iron powder with an average particle size of 6μm and 15wt.% of aluminum powder with an average particle size of 80nm according to the mass fraction to obtain carbonyl iron / aluminum mixed powder, and put the carbonyl iron / aluminum mixed powder Put it into the nylon ball mill tank;

[0069] Step S12, adding stainless steel grinding balls into the nylon ball milling tank, and the mass ratio of the stainless steel grinding balls to the carbonyl iron / aluminum mixed powder ball...

Embodiment 3

[0079] This embodiment proposes an anti-oxidant carbonyl iron / aluminum mixed powder absorbent, which is composed of 97 wt.% carbonyl iron powder and 3 wt.% aluminum powder.

[0080] This embodiment also proposes a method for preparing the anti-oxidation carbonyl iron / aluminum mixed powder absorbent, the specific process is:

[0081] Step S1: Preparation of carbonyl iron / aluminum mixed powder with iron / aluminum alloy layer:

[0082] Step S11, weigh 97wt.% of the carbonyl iron powder with an average particle size of 1μm and 3wt.% of the aluminum powder with an average particle size of 20nm according to the mass fraction to obtain a carbonyl iron / aluminum mixed powder, and put the carbonyl iron / aluminum mixed powder Put it into the PTFE ball mill tank;

[0083] Step S12, adding alumina grinding balls into the polytetrafluoroethylene ball milling tank, and the mass ratio of the alumina grinding balls to the carbonyl iron / aluminum mixed powder balls is 5:1;

[0084] Step S13, adding an appr...

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Abstract

The invention discloses an antioxidant absorbent and a preparation method thereof. 85-97 wt.% of carbonyl iron powder with an average particle size of 1-6 [mu]m and 15-3 wt.% of aluminum powder with an average particle size of 20-80 nm are weighed according to a mass fraction to be mixed to obtain carbonyl iron / aluminum mixed powder, and then the carbonyl iron / aluminum mixed powder is subjected toball milling at a speed of 100-250 rpm for 4-8 hours in an argon sealing atmosphere; the mass ratio of the spherical materials is 5-15: 1, so that aluminum powder is uniformly attached to the surfaceof the carbonyl iron powder to prepare carbonyl iron / aluminum mixed powder with an iron / aluminum alloying layer; and then washing and drying are performed with an organic solution, ball milling is carried out at a speed of 250-400 rpm for 8-12 hours, the mass ratio of the ball to the material is 15-25: 1, flaky carbonyl iron / aluminum mixed powder is obtained, the thickness of the flaky carbonyl iron / aluminum mixed powder is less than 1 [mu]m, and then washing, drying and sieving are carried out to obtain the antioxidant absorbent. The problem of low oxidation resistance of existing carbonyl iron powder is solved.

Description

Technical field [0001] The invention belongs to the field of absorbent material preparation, and relates to an antioxidant absorbent and a preparation method thereof. Background technique [0002] Carbonyl iron particles (CIPs) are a typical representative of magnetic metal micropowder absorbing materials. They are obtained by thermal decomposition of carbonyl iron compounds in a preheated nitrogen atmosphere. They have a unique layered structure of onion balls and have a relatively high resistivity. High, it is beneficial to suppress the eddy current effect and reduce the adverse effects caused by the skin effect. In addition, as a typical magnetic absorbent, carbonyl iron powder has the advantages of high permeability, high saturation magnetization and good temperature stability, and is widely used in the field of microwave absorption. [0003] Carbonyl iron powder has a relatively high Curie temperature (approximately 767°C), so it is expected to prepare a microwave absorbing c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/04
CPCB22F9/04B22F2009/043B22F1/17
Inventor 周影影马莉娅谢辉张康熙鲁媛媛于嫚李兆
Owner XIAN AERONAUTICAL UNIV
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