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A kind of Fe-Ni solid solution-MN doped ZNO electromagnetic shielding composite material and its preparation method

A technology of electromagnetic shielding and composite materials, applied in magnetic field/electric field shielding, nanotechnology for materials and surface science, electrical components, etc., can solve the problem of large crystal size, poor electromagnetic wave absorption ability, zinc oxide electromagnetic impedance and magnetic loss low level problem

Active Publication Date: 2021-05-18
陈露
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a Fe-Ni solid solution-Mn-doped ZnO electromagnetic shielding composite material and its preparation method, and solves the problem that the crystal structure of zinc oxide wave-absorbing and electromagnetic shielding materials is simple and the crystal size Larger, the absorption ability of electromagnetic waves is not satisfactory, and the electromagnetic impedance and magnetic loss of zinc oxide are low, so that the electromagnetic shielding material does not absorb well.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of nano-Fe-Ni solid solution: Add 1000 mL of distilled water to the reaction flask, place the reaction flask in a constant temperature water bath and heat to 60 °C, then add 8 parts of ferric chloride and 9 parts of nickel chloride and stir at a constant speed until Dissolve the solid, then weigh 5 parts of trisodium citrate and 24 parts of sodium hydroxide in turn and stir to dissolve at a constant speed, then weigh 54 parts of reducing agent hydrazine hydrate, raise the temperature of the water bath to 85 °C, stir and react at a constant speed for 1 h, and then The solution in the reaction bottle was transferred into the automatic hydrothermal synthesis reaction kettle, and the temperature of the reaction kettle was set to 160 °C, and the reaction was carried out by uniform magnetic stirring for 18 h. After the reaction was completed, the reaction kettle was cooled to room temperature, and the material was filtered to remove the solvent to obtain a solid...

Embodiment 2

[0033] (1) Preparation of nano-Fe-Ni solid solution: Add 1000 mL of distilled water to the reaction flask, place the reaction flask in a constant temperature water bath and heat to 70 °C, then add 8.5 parts of ferric chloride and 9.5 parts of nickel chloride and stir at a constant speed until Dissolve the solid, then weigh 6 parts of trisodium citrate and 25 parts of sodium hydroxide in turn and stir to dissolve at a constant speed, then weigh 51 parts of reducing agent hydrazine hydrate, raise the temperature of the water bath to 85 °C, stir and react at a constant speed for 1 h, and then add The solution in the reaction bottle was transferred into the automatic hydrothermal synthesis reaction kettle, and the temperature of the reaction kettle was set to 160 °C, and the reaction was carried out with uniform magnetic stirring for 20 h. After the reaction was completed, the reaction kettle was cooled to room temperature, and the material was filtered to remove the solvent to obta...

Embodiment 3

[0037] (1) Preparation of nano-Fe-Ni solid solution: add 1200 mL of distilled water to the reaction flask, place the reaction flask in a constant temperature water bath and heat to 70 °C, then add 9 parts of ferric chloride and 10 parts of nickel chloride and stir at a constant speed until Dissolve the solid, then weigh 7 parts of trisodium citrate and 26 parts of sodium hydroxide in turn and stir to dissolve at a constant speed, then weigh 48 parts of reducing agent hydrazine hydrate, raise the temperature of the water bath to 90 °C, stir and react at a constant speed for 1 h, and then The solution in the reaction bottle was transferred into the automatic hydrothermal synthesis reaction kettle, and the temperature of the reaction kettle was set to 160 ° C, and the reaction was carried out with uniform magnetic stirring for 22 h. After the reaction was completed, the reaction kettle was cooled to room temperature, and the material was filtered to remove the solvent to obtain a s...

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Abstract

The invention relates to the technical field of electromagnetic shielding composite materials, and discloses an electromagnetic shielding composite material of Fe-Ni solid solution-Mn doped with ZnO, comprising the following formula raw materials: nanometer Fe-Ni solid solution, zinc chloride, manganese chloride, Mixture, carbon source. The electromagnetic shielding composite material of this Fe-Ni solid solution-Mn doped ZnO, the Mn of nanocrystal structure 0.05‑0.15 Zn 0.85‑0.95 The lower conductivity of O reduces eddy current loss, increases its own impedance matching performance and absorption frequency band, makes it easier for electromagnetic waves or microwaves to enter the interior of the material, and promotes the storage and loss of electromagnetic waves inside the material. FeNi solid solution has a strong dielectric The constant and magnetic permeability, the storage capacity and loss performance of electric energy and electromagnetic waves are much higher than those of single metal materials. The absorbed electromagnetic waves form charge accumulation on the huge surface of carbon microcrystals and complex micropores, and partial discharge generates micro electric fields. The continuous multiple reflection of electromagnetic waves in carbon microcrystals produces surface dipole polarization.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding composite materials, in particular to an electromagnetic shielding composite material of Fe-Ni solid solution-Mn doped with ZnO and a preparation method thereof. Background technique [0002] Electromagnetic wave is an oscillating particle wave derived from the same and mutually perpendicular electric field and magnetic field in space. It is an electromagnetic field that propagates in the form of waves. Its propagation direction is perpendicular to the plane formed by the electric field and magnetic field. Electromagnetic wave is the main way of electromagnetic energy transmission When the high-frequency circuit is working, it will radiate electromagnetic waves outward and interfere with other nearby equipment. On the other hand, various electromagnetic waves in the space will also be induced into the circuit, causing interference to the circuit. The mechanism of electromagnetic r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C01G45/00B82Y30/00B22F9/24
CPCB22F9/24B22F2009/245B82Y30/00C01G45/00H05K9/0081
Inventor 李彩琴
Owner 陈露
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