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Preparation method for hollow microspheric soft magnetic ferrite with high magnetic permeability and high microwave absorbing property

A technology of soft magnetic ferrite and high magnetic permeability, applied in chemical instruments and methods, inorganic chemistry, cobalt compounds, etc., can solve problems that need to be enhanced

Inactive Publication Date: 2019-03-29
ZHONGDE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the magnetic permeability and wave absorption performance of soft ferrite materials still need to be enhanced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of a hollow microspherical soft ferrite with high magnetic permeability and good wave-absorbing property proposed by the present invention comprises the following steps:

[0019] S1. Put the polystyrene microspheres in deionized water for ultrasonic cleaning, take them out and place them in aqueous sodium hydroxide solution to continue ultrasonic cleaning, then filter, wash with water, and dry to obtain material A;

[0020] S2. Mix potassium permanganate aqueous solution and surfactant, add concentrated sulfuric acid dropwise under stirring state, then add material A, ultrasonic treatment, suction filtration, water washing, vacuum drying to obtain material B;

[0021] S3. Mix ferric nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, barium nitrate, cobalt nitrate hexahydrate and citric acid aqueous solution, add ammonia water to adjust the pH of the system to neutral, heat up and stir, then add material B to continue stirrin...

Embodiment 2

[0024] The preparation method of a hollow microspherical soft ferrite with high magnetic permeability and good wave-absorbing property proposed by the present invention comprises the following steps:

[0025] S1. Place the polystyrene microspheres in deionized water for ultrasonic cleaning for 35 minutes, take them out and place them in an aqueous sodium hydroxide solution with a concentration of 1 mol / L to continue ultrasonic cleaning for 80 minutes, then filter, wash with water, and dry to obtain material A;

[0026] S2. Mix 100 parts by weight of 2 wt % potassium permanganate aqueous solution with 0.4 parts of surfactant, add 30 parts of concentrated sulfuric acid dropwise under stirring, then add 3 parts of material A, ultrasonically treat for 1 hour, and suction filter. Washing with water, drying in vacuum to obtain material B;

[0027] S3. Mix ferric nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, barium nitrate, cobalt nitrate hexahydrate and ...

Embodiment 3

[0030] The preparation method of a hollow microspherical soft ferrite with high magnetic permeability and good wave-absorbing property proposed by the present invention comprises the following steps:

[0031] S1. Place the polystyrene microspheres in deionized water for ultrasonic cleaning for 38 minutes, take them out and place them in an aqueous sodium hydroxide solution with a concentration of 1.5 mol / L to continue ultrasonic cleaning for 70 minutes, then filter, wash with water, and dry to obtain material A;

[0032] S2. Mix 120 parts by weight of 2.2wt% potassium permanganate aqueous solution with 0.45 parts of surfactant, add 35 parts of concentrated sulfuric acid dropwise under stirring, then add 4 parts of material A, ultrasonically treat for 1.2h, pump Filter, wash with water, and dry in vacuum to obtain material B;

[0033] S3. Mix ferric nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, barium nitrate, cobalt nitrate hexahydrate and citric a...

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Abstract

The invention discloses a preparation method for hollow microspheric soft magnetic ferrite with high magnetic permeability and high microwave absorbing property. The preparation method comprises the following steps that S1, polystyrene microspheres are placed in deionized water for ultrasonically cleaning, are taken out and then are put into a sodium hydroxide aqueous solution for further ultrasonic cleaning, and then filtering, water washing and drying are carried out so as to obtain a material A; S2, a potassium permanganate aqueous solution and a surfactant are mixed, concentrated sulfuricacid is dropwise added in a stirring state, then the material A is added, ultrasonic treatment, suction filtration, water washing and vacuum drying are carried out so as to obtain a material B; S3, iron nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, barium nitrate, cobalt nitrate hexahydrate and a citric acid aqueous solution are mixed, ammonium hydroxide is added to adjust the pH value of a system to be neutral, heating and stirring are carried out, then the material B is added, stirring is continuously carried out, then drying and sieving are carried out so as toobtain a material C; and S4, the material C is heated and calcined and then is cooled so as to obtain the hollow microspheric soft magnetic ferrite with high magnetic permeability and high microwave absorbing property.

Description

technical field [0001] The invention relates to the technical field of ferrite materials, in particular to a method for preparing hollow microspherical soft ferrite with high magnetic permeability and good wave-absorbing properties. Background technique [0002] The application of soft magnetic materials in industry began at the end of the 19th century, with the rise of electric power and telecommunication technology, and its application range is extremely wide. Soft magnetic materials are not only used in the fields of home appliances, information technology, automobiles and other supporting fields, but more importantly, soft magnetic materials, as the main raw materials for the production of electronic components, have brought a steady stream of demand for them. With the advancement of science and technology and the development of industry, soft magnetic materials have been widely used, and higher requirements have been put forward for the performance of soft magnetic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00
CPCC01G51/006C01P2004/34C01P2006/10C01P2006/42
Inventor 瞿德林王久如李丛俊
Owner ZHONGDE ELECTRONICS
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