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Multi-pore hollow iron nano spherical electromagnetic wave absorption material as well as preparation method and application thereof

A technology of absorbing materials and hollow iron, which is applied in the fields of nanomagnetism, nanotechnology, nanotechnology, etc., can solve the problems of high price, cumbersome operation, and incomplete template removal, and achieve low cost, simple preparation process, and electromagnetic wave absorption performance excellent effect

Active Publication Date: 2018-06-05
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have defects such as high price, cumbersome operation, and incomplete template removal, which also lead to the inability of these methods to be widely used in the preparation of hollow nanomaterials.

Method used

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  • Multi-pore hollow iron nano spherical electromagnetic wave absorption material as well as preparation method and application thereof
  • Multi-pore hollow iron nano spherical electromagnetic wave absorption material as well as preparation method and application thereof
  • Multi-pore hollow iron nano spherical electromagnetic wave absorption material as well as preparation method and application thereof

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Embodiment Construction

[0008] Technical scheme of the present invention is as follows:

[0009] A porous hollow iron nanosphere electromagnetic wave absorbing material, the wave absorbing material is a hollow sphere with a diameter of 500-600nm, the wall thickness of the hollow sphere is 50-60nm, the pore structure is distributed on the surface of the hollow sphere, and the pore size is 1-50nm.

[0010] Preferably, according to the present invention, the X-ray powder diffraction pattern of the porous hollow iron nanosphere electromagnetic wave absorbing material shows iron with a body-centered cubic structure.

[0011] Preferably according to the present invention, the saturation magnetic susceptibility of the porous hollow iron nanosphere electromagnetic wave absorbing material is 139.6emu / g;

[0012] Preferably, the coercive force H cj It is 252.6Oe.

[0013] Preferably according to the present invention, the porous hollow iron nanosphere electromagnetic wave absorbing material is made into an a...

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Abstract

The invention relates to a multi-pore hollow iron nano spherical electromagnetic wave absorption material as well as a preparation method and the application thereof. The electromagnetic wave absorption material is a hollow sphere of which the diameter is 500-600nm. The preparation method comprises the following steps: dissolving a precursor salt such as ferric nitrate and surfactants such as polyvinylpyrrolidone into an alcohol solvent, further adding a small amount of deionized water, performing a thermal reaction on the solvent so as to obtain a precursor, performing calcining treatment, further reducing in the presence of a hydrogen atmosphere, and performing direct reduction at 400-500 DEG C, so as to obtain a multi-pore hollow iron nano sphere. The obtained multi-pore hollow iron nano sphere has the characteristics of good stability and uniformity, good electromagnetic wave absorption performance, wide absorption cover frequency range, small corrosion and low cost, and can be adopted to manufacture an electromagnetic absorber.

Description

technical field [0001] The invention relates to a porous hollow iron nanosphere electromagnetic wave absorbing material and its preparation method and application, belonging to the technical field of electromagnetic wave absorbing materials. Background technique [0002] High-frequency electromagnetic waves with a frequency in the GHz range are more and more widely used in high-tech aspects such as mobile phones, intelligent transportation systems, electronic toll collection systems, medical systems, and local area network systems. Electromagnetic waves radiated by electronic and communication equipment It will interfere with the normal operation of the surrounding electronic equipment, resulting in its performance degradation or even failure. In addition, severe electromagnetic radiation can also endanger human health. Studies have shown that electromagnetic radiation has varying degrees of impact on the nervous system, reproductive system, cardiovascular system, and immune...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00B22F1/00B22F9/24B82Y25/00
CPCH05K9/0081B82Y25/00B22F9/24B22F1/0549B22F1/0655B22F1/07B22F1/054
Inventor 刘久荣刘伟吴莉莉吴楠楠汪宙
Owner SHANDONG UNIV
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