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A kind of ultra-long continuous ferrite fiber and preparation method thereof

A ferrite, ultra-long technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve problems such as cracking, rare research work, limited application, etc., to achieve reduced ferromagnetic loss, flexible structure, and reduced volume. Effect

Active Publication Date: 2022-04-22
无锡燊旺和电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing methods commonly used to prepare ferrite fibers include sol-gel method, organosol complexation method, and electrospinning method. However, for the continuous preparation of ultra-long continuous ferrite fibers, the existing research work is extremely rare.
From previous research work, it was found that the cracking of ferrite fibers is the main problem, and the shortening of gel fibers is an important reason for cracking, which limits the application of ferrite fiber materials in multiple fields such as recording materials and microwave shielding and absorption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An ultra-long continuous ferrite fiber is prepared by the following method:

[0028] S1. Prepare viscous solution A and metal salt solution B.

[0029] The preparation method of the viscous solution A includes: first, take PVP and dissolve it in ethanol, the mass ratio of PVP (polyvinylpyrrolidone) to ethanol is 1:3.5. Then, stir until the PVP is completely dissolved to obtain the viscous solution A.

[0030] The preparation method of the metal salt solution B includes: weighing the metal salt and the metal iron salt, adding them into the organic solvent DMF (N,N-dimethylformamide), and stirring evenly at room temperature to prepare the metal salt solution B. The mol ratio of described metal salt and metal iron salt is 1:1, and the quality of adding metal salt and metal iron salt in DMF should make in the solution B that makes, the total concentration of metal salt and metal iron salt is 30wt% .

[0031] The metal salt is chlorate. Among them, the metal cation is: Z...

Embodiment 2

[0039] An ultra-long continuous ferrite fiber is prepared by the following method:

[0040] S1. Prepare viscous solution A and metal salt solution B.

[0041] The preparation method of the viscous solution A includes: first, take PVP and dissolve it in ethanol, the mass ratio of PVP (polyvinylpyrrolidone) to ethanol is 1:4. Then, stir until the PVP is completely dissolved to obtain the viscous solution A.

[0042] The preparation method of the metal salt solution B includes: weighing the metal salt and the metal iron salt, adding them into the organic solvent DMF (N,N-dimethylformamide), and stirring evenly at room temperature to prepare the metal salt solution B. The mol ratio of described metal salt and metal iron salt is 1:1.2, and the quality of adding metal salt and metal iron salt in DMF should make in the solution B that makes, the total concentration of metal salt and metal iron salt is 35wt% .

[0043] The metal salt is nitrate. Among them, the metal cation is: Ni...

Embodiment 3

[0051] An ultra-long continuous ferrite fiber is prepared by the following method:

[0052] S1. Prepare viscous solution A and metal salt solution B.

[0053] The preparation method of the viscous solution A includes: first, take PVP and dissolve it in ethanol, the mass ratio of PVP (polyvinylpyrrolidone) to ethanol is 1:3. Then, stir until the PVP is completely dissolved to obtain the viscous solution A.

[0054] The preparation method of the metal salt solution B includes: weighing the metal salt and the metal iron salt, adding them into the organic solvent DMF (N,N-dimethylformamide), and stirring evenly at room temperature to prepare the metal salt solution B. The mol ratio of described metal salt and metal iron salt is 1:0.8, and the quality of adding metal salt and metal iron salt in DMF should make in the solution B that makes, the total concentration of metal salt and metal iron salt is 25wt% .

[0055] The metal salt is carbonate. Among them, the metal cation is: ...

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Abstract

In order to solve the deficiencies of the prior art, the present invention provides a method for preparing ultra-long continuous ferrite fibers, including: S1. Prepare viscous solution A and metal salt solution B. S2. Mix the viscous solution A and the metal salt solution B evenly to obtain a precursor solution. S3. The precursor solution obtained in step S2 is placed in the container of the spinning device, and extruded in an inert gas pressurized environment to form a wet gel fiber. S4. Collect the wet gel fibers obtained in step S3, and perform sequentially: drying, calcining, and sintering operations to obtain the ultra-long continuous ferrite fibers. The present invention adopts organic complex alcohol sol, and utilizes drum spinning technology to prepare ultra-long continuous ferrite fiber, and the obtained ultra-long continuous ferrite fiber can replace the block ferrite commonly used now, and reduce the ferromagnetic loss.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to an ultra-long continuous ferrite fiber and a preparation method thereof. Background technique [0002] Electromagnetic pollution is becoming more and more serious with the development of the electronics industry, which not only interferes with the normal operation of electrical equipment, but also poses a threat to human health. And absorbing materials can effectively weaken or eliminate electromagnetic pollution, which has become a research hotspot of experts and scholars from all over the world. Ferrite materials have been widely used in the field of microwave absorption because of their high resistivity and magnetic permeability, and they can be compounded with other absorbing materials to improve the microwave absorption performance of coatings. Fiber materials are not only much lighter in quality than powder and film materials, but also because of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10
CPCD01F9/10
Inventor 娄建勇
Owner 无锡燊旺和电子科技有限公司