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A kind of halloysite-cerium doped manganese-zinc ferrite composite wave absorbing material and preparation method

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 high raw material cost, single loss mechanism, poor microwave dielectric properties, etc., to achieve enhanced dielectric loss Performance, improvement of absorbing performance and effective frequency band, improvement of dielectric properties and electromagnetic impedance

Active Publication Date: 2022-07-01
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 comprising 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 , add deionized water to prepare a mixed solution, add 9 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjust the solution to pH=8, stir and react at 90 ° C for 0.5 h, filter, Washed with distilled water until neutral, dried, the filtrate was freeze-dried, calcined at 1100°C for 3h, and the chemical formula was Mn 0.5 Zn 0.5 Ce 0.02 Fe 1.98 O 4 cerium-doped manganese-zinc ferrite;

[0021] S2, adding 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 dispersion, and adding cerium...

Embodiment 2

[0023] A halloysite-cerium-doped manganese-zinc ferrite composite wave absorbing material, the preparation method comprising 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 , add deionized water to prepare a mixed solution, add 8 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjust the solution to pH=9, stir and react at 80 ° C for 1 h, filter, distilled water Washed to neutrality, dried, the filtrate was freeze-dried, and then calcined at 1200 °C for 2 h, the chemical formula was 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, and add cerium-doped ma...

Embodiment 3

[0027] A halloysite-cerium-doped manganese-zinc ferrite composite wave absorbing material, the preparation method comprising 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 , add deionized water to prepare a mixed solution, add 10mol / L NaOH aqueous solution to the mixed solution under the vigorous stirring condition of an electromagnetic stirrer, adjust the solution to pH=8, stir and react at 90 ° C for 0.5 h, filter, Washed with distilled water until neutral, dried, the filtrate was freeze-dried, and then calcined at 1100 °C for 4 h, the chemical formula was Mn 0.5 Zn 0.5 Ce 0.06 Fe 1.94 O 4 cerium-doped manganese-zinc ferrite;

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

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Abstract

The invention discloses a halloysite-cerium doped manganese-zinc ferrite composite wave absorbing material and a preparation method. The preparation method comprises the following steps: weighing manganese salt, zinc salt, cerium salt and iron salt, adding deionized Prepare a mixed solution in water, add NaOH aqueous solution to the mixed solution under stirring conditions, heat for reaction, filter, wash, dry, and calcinate, and the chemical formula is Mn 0.5 Zn 0.5 Ce x Fe 2‑x O 4 The cerium-doped manganese-zinc ferrite; the cerium-doped manganese-zinc ferrite, halloysite and aniline monomers were added to the inorganic acid solution for ultrasonic dispersion, and then the inorganic acid solution dissolved with ammonium persulfate was added, and the reaction was stirred. Filtration, washing and drying to obtain the halloysite-cerium-doped manganese-zinc ferrite composite wave absorbing material. In the invention, halloysite is used as the carrier of cerium-doped manganese-zinc ferrite, combined with polyaniline, the wave-absorbing performance 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. Background technique [0002] The rapid development of microwave information technology and the widespread use of microwave devices make the problem of electromagnetic radiation and electromagnetic interference between devices more and more serious. To solve these problems, absorbing materials can be used to absorb unwanted electromagnetic waves. In addition to civilian use, absorbing materials are also widely used in radar 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 requirements: thin absorbing coating (or patch), light weight, wide absorbing frequency, strong absorbing performance, and continue to move t...

Claims

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Application Information

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Patent Type & Authority Patents(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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