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Zinc ferrite material and preparation method thereof

A technology of zinc ferrite and raw material, applied in the field of zinc ferrite material and its preparation, can solve the problems such as the saturation magnetization can not meet the needs, the high temperature resistance performance of the soft ferrite material can not meet the development needs and the like

Inactive Publication Date: 2017-04-26
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of miniaturization and high frequency of electronic devices, the operating frequency of soft ferrite materials is urgently required to develop in the GHz frequency band. The saturation magnetization of current soft ferrite materials cannot meet the needs, and the current soft ferrite materials The high temperature resistance of bulk materials can no longer meet the needs of development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] A preparation method of zinc ferrite material, comprising the steps of:

[0027] Ingredients: raw materials include iron acetylacetonate, zinc acetylacetonate, surfactant and solvent; the solvent is dibenzyl ether or 1-octadecene or oleylamine;

[0028] Wherein, the molar ratio of zinc acetylacetonate and iron acetylacetonate is 0.1~0.8, the molar ratio of the total amount of iron acetylacetonate and zinc acetylacetonate to surfactant is 0.01~0.85, and the amount of solvent can fully dissolve iron acetylacetonate and acetylacetonate Zinc;

[0029] The raw materials are placed in a protective gas environment, mixed at room temperature; and then the product particles obtained after slow heating, rapid heating and cooling are the zinc ferrite materials.

[0030] The chemical formula of the zinc ferrite material prepared by the above method is: Zn X Fe 3-X o 4 ; where: 0<X<0.53.

[0031] What is to be explained here is: through the reasonable ratio of iron acetylaceton...

Embodiment 1

[0048] A zinc ferrite material and a preparation method thereof, comprising the steps of:

[0049] (1) Ingredients

[0050] Iron acetylacetonate 12mmol, zinc acetylacetonate 2mmol, dibenzyl ether 20mL, oleic acid 28mmol.

[0051] (2) Reaction

[0052] Put the raw materials in the batching (1) in the three-necked flask, and connect the temperature measuring device, ventilation device, condensation device and exhaust device.

[0053] Stir for 1 h at room temperature using a magnetic heater.

[0054] Slowly (4°C / min) raise the temperature to 120°C, and keep the constant temperature for 1h.

[0055] Rapidly (16°C / min) heat up to 280°C, react at high temperature for 0.5h and then cool naturally.

[0056] The resultant particles were washed with hexane and collected.

[0057] Performance test example:

[0058]Test object: ultra-high saturation magnetization high temperature resistant zinc ferrite material described in Example 1, chemical formula: Zn 0.12 Fe 2.88 o 4 .

[0...

Embodiment 2

[0063] (1) Ingredients

[0064] Iron acetylacetonate 12mmol, zinc acetylacetonate 8.5mmol, dibenzyl ether 20mL, oleic acid 28mmol.

[0065] (2) Reaction

[0066] a) Put the raw materials in the ingredient (1) in a three-necked flask, and connect the temperature measuring device, ventilation device, condensing device and exhaust device.

[0067] b) Stir for 1 h at room temperature using a magnetic heater.

[0068] c) Raise the temperature slowly (5°C / min) to 120°C, and keep the temperature constant for 1h.

[0069] d) Rapidly (16°C / min) heat up to 280°C, react at high temperature for 0.5h and cool down naturally.

[0070] e) Wash the product particles with toluene and collect them.

[0071] Performance test example:

[0072] Test object: ultra-high saturation magnetization high temperature resistant zinc ferrite material described in Example 2, chemical formula: Zn 0.48 Fe 2.52 o 4 .

[0073] The saturation magnetization is 120emu / g.

[0074] The Curie temperature is ...

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Abstract

The invention discloses a zinc ferrite material and a preparation method thereof, and belongs to the field of magnetic materials. The preparation method comprises the following steps of preparing materials, wherein raw materials comprise ferric acetylacetonate, zinc acetylacetonate, a surfactant and a solvent, the solvent is benzyl ether or 1-octadecene or oleylamine, the mole ratio of the zinc acetylacetonate to the ferric acetylacetonate is 0.1-0.8, the mole ratio of the total amount of the ferric acetylacetonate and the zinc acetylacetonate to the surfactant is 0.01-0.85, and the quantity of the solvent is determined in a manner that the ferric acetylacetonate and the zinc acetylacetonate can be fully dissolved by the solvent; placing the raw materials in protective gas environment, and performing uniform mixing at room temperature; and then performing low-speed warming, performing quick-speed warming, and performing cooling so as to obtain resultant granules namely the zinc ferrite material. The zinc ferrite material prepared by the method disclosed by the invention has extra-high saturation magnetization intensity, and can maintain favorable magnetic properties after being subjected to high temperature calcination.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a zinc ferrite material and a preparation method thereof. Background technique [0002] Soft magnetic ferrite is a kind of magnetic functional material with a wide range of applications, and has a wide range of applications in many fields such as national defense, electronics, chemical industry, ceramics, biology and medicine. [0003] Soft ferrite usually has the advantages of high magnetic permeability, high resistivity and low loss performance. As an important characteristic parameter of soft ferrite, saturation magnetization has a limiting effect on the magnetic permeability and resonance frequency of the material. . Existing soft ferrite materials, especially those with high magnetic permeability, are often limited in application due to low saturation magnetization. The saturation magnetization of traditional soft magnetic ferrite is usually 0.6T or lower, so the frequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/632H01F1/36
CPCC04B35/2658C04B35/622C04B35/632C04B2235/3284C04B2235/96H01F1/36
Inventor 杨洋冀志江王静王晓燕侯国艳
Owner CHINA BUILDING MATERIALS ACAD
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