Preparing method for load magnetic metal sepiolite composite powder or fiber

A sepiolite fiber and magnetic metal technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problems of insignificant absorption effect, high density, narrow absorption frequency band, etc., and achieve easy magnetic loss matching characteristics, Simple preparation method and good adsorption effect

Active Publication Date: 2017-04-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Carbonyl iron, as a typical magnetic loss absorbing material, has high magnetic permeability and thermal stability, and has a certain absorption potential in the S-band (2-4 GHz), but its high density and single loss mechanism make it increasingly difficult to Meet today's growing application requirements
Li Ze et al [Li Ze, Xu Baocai, Wang Jianjiang et al, BaTiO 3 Preparation of coated carbonyl iron absorbing agent and research on its absorbing performance, Journal of Synthetic Crystals, 2016, 45(9): 2240-2245] Adjusting the dielectric constant of the material and improving the absorbing properties of the material b

Method used

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  • Preparing method for load magnetic metal sepiolite composite powder or fiber
  • Preparing method for load magnetic metal sepiolite composite powder or fiber
  • Preparing method for load magnetic metal sepiolite composite powder or fiber

Examples

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Example Embodiment

[0042] Example 1

[0043] After the sepiolite powder is burned in an oven at 120° C. for 12 hours, it is cooled, ground, and passed through a 200-mesh sieve to obtain the pretreated sepiolite powder. Using xylene as the organic solvent, the carbonyl iron content in the solution system is 50% by mass to configure the metal organic solution system, and added to the 20L reactor, the filling volume is 50%, and the liquid-to-solid ratio is 4 to the pretreated Sepiolite powder. The reactor was closed, nitrogen was introduced, and the oxygen in the reactor was removed. Set up 3 heating programs: (1) heating from room temperature 120min to 100℃, (2) heating from 100℃ 540min to 120℃, (3) heating from 120℃ 240min to 135℃. Then the temperature is lowered to room temperature, and the material is discharged. The obtained material is washed with absolute ethanol, filtered, dried, ground, and sieved to obtain the reaction product, which is the sepiolite fiber composite powder loaded with magn...

Example Embodiment

[0046] Example 2

[0047] After the sepiolite powder is burned in an oven at 120° C. for 12 hours, it is cooled, ground, and passed through a 200-mesh sieve to obtain the pretreated sepiolite powder. Xylene is an organic solvent, and iron carbonyl and cobalt carbonyl are mixed in a ratio of 1:1 by mass. The mixture of iron pentacarbonyl and dicobalt octacarbonyl in the solution system is configured with a metal organic solution system with a mass percentage of 50%, and added to 20L reaction In the kettle, the filling volume is 50%, and the pretreated sepiolite powder is added with a liquid-solid ratio of 4. The reactor was closed, nitrogen was introduced, and the oxygen in the reactor was removed. Set up 3 heating programs: (1) heating from room temperature 120min to 100℃, (2) heating from 100℃ 540min to 120℃, (3) heating from 120℃ 240min to 135℃. Then the temperature is lowered to room temperature and the material is discharged. The obtained material is washed with absolute et...

Example Embodiment

[0048] Example 3

[0049] Prepare a silane coupling agent (KH550) 95% ethanol solution with a concentration of 0.5mmol / L, add sepiolite fiber to the silane coupling agent 95% ethanol solution at a liquid-solid ratio of 3, stir at 20°C for 60 minutes, then wash and filter , Dried at 120℃ for 2h, cooled, ground, and sieved to obtain pretreated sepiolite fiber. Quinoline is an organic solvent. Nickel tetracarbonyl and dimanganese decacarbonyl are mixed at a mass percentage of 2.6:1. The mixture of nickel tetracarbonyl and dimanganese decacarbonyl has a mass percentage of 30% in the solution system. The metal organic solution system is configured and added to In the 20L reactor, the filling volume is 50%, and the pretreated sepiolite powder is added with a liquid-solid ratio of 8. The reactor was closed, nitrogen was introduced, and the oxygen in the reactor was removed. Set up 3 heating programs: (1) from room temperature 240min to 150℃, (2) from 150℃ to 480min to 200℃, (3) from 2...

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Abstract

The invention discloses a preparing method for load magnetic metal sepiolite composite powder or fiber. The method includes the steps that sepiolite powder or sepiolite fiber is fired or placed in a silane coupling agent to be soaked, and pretreated sepiolite powder or sepiolite fiber is obtained; and the pretreated sepiolite powder or sepiolite fiber is mixed with a magnetic metal organic matter solution, then the mixture is sealed in a reaction kettle to be subjected to a pyrolytic reaction, and the load magnetic metal sepiolite composite powder or fiber is obtained. Magnetic metal in the prepared composite material is evenly distributed in the surface or pores of sepiolite, the magnetic metal load is high, and the electromagnetic matching performance of the material can be adjusted according to the load and the metal ratio. The preparing method is simple in technology and low in cost, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a preparation process of magnetic metal-modified sepiolite powder or fiber material, in particular to a preparation method for preparing magnetic metal-loaded sepiolite composite powder or fiber by pyrolysis; it belongs to the preparation of electromagnetic wave-absorbing materials technology field. Background technique [0002] With the development of science and technology and electronic industry, electromagnetic waves are used in all aspects of daily life and national defense and military affairs. The widespread application of radio, television, and wireless networks has greatly facilitated people's daily lives. However, it also causes electromagnetic waves to be ubiquitous, which not only affects the normal operation of various electronic equipment, but also has unpredictable effects on the human body and the natural environment, which promotes the continuous development and application of electromagnetic wave-absorbing ma...

Claims

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Application Information

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IPC IPC(8): B22F9/30B22F1/02
CPCB22F9/30B22F1/17
Inventor 杜作娟汪翔宇黄小忠肖陆军赵子翔成雨果付泽宇胡思闽杨泽欧熊益军
Owner CENT SOUTH UNIV
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