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Halloysite-cerium doped manganese zinc ferrite composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material, manganese-zinc ferrite technology, applied in the direction of electrical components, magnetic field/electric field shielding, etc., can solve the problems of difficult coverage application and expansion, poor microwave dielectric properties, single loss mechanism, etc., to achieve improved dielectric Electrical performance and electromagnetic impedance, improvement of absorbing performance, effect of improving absorbing performance and effective frequency band

Active Publication Date: 2020-05-15
ZHONGDE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-zinc ferrite has always occupied a dominant position in the performance of ferrite absorbing materials, but it has become a bottleneck that is difficult to popularize due to its high raw material cost, and it is also difficult to cover the current wireless charging and Internet of Things due to its single loss mechanism. , intelligent products, etc. in the kHz-GHz frequency band application and expansion
Manganese zinc ferrite is often used in soft magnetic cores such as low loss and high conductivity. The magnetic permeability in the microwave frequency range is equivalent to that of nickel zinc ferrite, but its microwave dielectric properties are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A halloysite-cerium-doped manganese-zinc ferrite composite wave-absorbing material, the preparation method of which comprises the following steps:

[0020] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.001mol Ce(NO 3 ) 3 ·6H 2 O, 0.099mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 9 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=8, stirring and reacting at 90°C for 0.5h, and filtering, Wash with distilled water until neutral, dry, freeze-dry the filtrate, and calcinate at 1100°C for 3 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.02 Fe 1.98 o 4 Cerium doped manganese zinc ferrite;

[0021] S2. Add the above-mentioned cerium-doped manganese-zinc ferrite, halloysite with a particle size of 100 nm, and 1 mL of aniline monomer into a hydrochloric acid solution with a concentration of 0.3 mol / L for ultrasonic disp...

Embodiment 2

[0023] A halloysite-cerium-doped manganese-zinc ferrite composite wave-absorbing material, the preparation method of which comprises the following steps:

[0024] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.005mol Ce(NO 3 ) 3 ·6H 2 O, 0.095mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 8 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=9, stirring and reacting at 80°C for 1 hour, filtering, distilled water Wash until neutral, dry, freeze-dry the filtrate, and calcinate at 1200°C for 2 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.1 Fe 1.9 o 4 Cerium doped manganese zinc ferrite;

[0025] S2. Add the above-mentioned cerium-doped manganese-zinc ferrite, halloysite with a particle size of 50 nm, and 1 mL of aniline monomer into a hydrochloric acid solution with a concentration of 0.5 mol / L for ultrasonic dispersion, an...

Embodiment 3

[0027] A halloysite-cerium-doped manganese-zinc ferrite composite wave-absorbing material, the preparation method of which comprises the following steps:

[0028] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.003mol Ce(NO 3 ) 3 ·6H 2 O, 0.097mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 10 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=8, stirring and reacting at 90°C for 0.5h, and filtering, Wash with distilled water until neutral, dry, freeze-dry the filtrate, and calcinate at 1100°C for 4 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.06 Fe 1.94 o 4 Cerium doped manganese zinc ferrite;

[0029] S2. Add the above-mentioned cerium-doped manganese-zinc ferrite, halloysite with a particle size of 200nm, and 1mL aniline monomer into a hydrochloric acid solution with a concentration of 0.1mol / L for ultrasonic dispersio...

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Abstract

The invention discloses a halloysite-cerium doped manganese zinc ferrite composite wave-absorbing material and a preparation method thereof. The preparation method comprises the following steps: weighing a manganese salt, a zinc salt, a cerium salt and an iron salt, adding the salts into deionized water to prepare a mixed solution, adding a NaOH water solution into the mixed solution under stirring, heating to carry out reactions, filtering, washing, drying, calcining to obtain the cerium doped manganese zinc ferrite with a chemical formula of Mn<0.5>Zn<0.5>Ce<x>Fe<2-x>O<4>, adding the ceriumdoped manganese zinc ferrite, halloysite and aniline monomers into an inorganic acid solution, carrying out ultrasonic dispersion, adding an inorganic acid solution with dissolved ammonium persulfate,carrying out reactions under stirring, filtering, washing, and drying to obtain the halloysite-cerium doped manganese zinc ferrite composite wave-absorbing material. Halloysite is used as a carrier of the cerium doped manganese zinc ferrite and is matched with polyaniline, so that the wave-absorbing property is greatly improved, and the actual use requirements are met.

Description

technical field [0001] The invention relates to the technical field of ferrite wave-absorbing materials, in particular to a halloysite-cerium-doped manganese-zinc ferrite composite wave-absorbing material and a preparation method thereof. Background technique [0002] The rapid development of microwave information technology and the widespread use of microwave devices have made the problem of electromagnetic radiation and electromagnetic interference between devices more and more serious. To solve these problems, wave-absorbing materials can be used to absorb unwanted electromagnetic waves. In addition to civilian use, absorbing materials are also widely used in radar wave stealth coatings for national defense weapons and equipment such as aircraft, tanks, and ships. The development goal of absorbing materials is "thin, light, wide, and strong", that is, the absorbing coating (or patch) is required to be thin, light in weight, wide in absorbing frequency, and strong in abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K9/12C08K3/22C08G73/02H05K9/00
CPCC08K9/12C08K3/22C08G73/0266H05K9/0081C08L79/02
Inventor 瞿德林沈建元王久如王晓祥李丛俊
Owner ZHONGDE ELECTRONICS
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