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Nickel zinc ferrite powder and preparation method thereof

A technology of nickel-zinc ferrite and powder, which is applied in the field of nickel-zinc ferrite powder and its preparation, can solve the problems of poor low-frequency performance, etc., and achieve the effects of abundant sources, improved electromagnetic properties, and shortened transformation period

Inactive Publication Date: 2013-01-16
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A lot of work has been carried out in the research of ferrite for absorbing materials in China. The synthesis methods and material compositions are different, but the absorption band of excellent ferrite materials is mostly concentrated in the 3 cm (8GHz~12GHz) band. At present, this kind of ferrite Powder has played a very good role in the high and low frequency design of absorbing materials (8-18GHz working frequency band), but the low frequency performance of L and S bands is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The stoichiometric ratio of the nickel-zinc ferrite in this example is Ni 0.6 Zn 0.4 Fe 2 o 4 , the particle size is 25-40μm, and the density is 5.5g / cm 3 . The real part of the permittivity is 5.4, and the imaginary part is 0.0; the real part of the magnetic permeability is 2.2, and the imaginary part is 2.3.

[0044] Step 1: Precursor Preparation

[0045] (A) Precursor solution configuration

[0046] The precursor solution was composed of iron nitrate (Fe(NO 3 ) 3 9H 2 O), nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), zinc nitrate (Zn(NO 3 ) 2 ·6H 2O), sodium citrate (NaC 6 h 5 o 7 ) and distilled water;

[0047] Dosage: Add 34g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 7.4g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 5.0g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) and 30g sodium citrate (NaC 6 h 5 o 7 );

[0048] Using a magnetic stirring device to stir and disperse the above solution to obtain the first product;

[0049] Dispersion conditions: temperature is 80°C...

Embodiment 2

[0070] The stoichiometric ratio of the nickel-zinc ferrite in this example is Ni 0.5 Zn 0.5 Fe 2 o 4 , the particle size is 25-40μm, and the density is 5.8g / cm 3 . The real part of the permittivity is 5.0, and the imaginary part is 0.0; the real part of the magnetic permeability is 2.0, and the imaginary part is 2.0.

[0071] Step 1: Precursor Preparation

[0072] (A) Precursor solution configuration

[0073] The precursor solution was composed of iron nitrate (Fe(NO 3 ) 3 9H 2 O), nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), sodium citrate (NaC 6 h 5 o 7 ) and distilled water;

[0074] Dosage: 40g ferric nitrate (Fe(NO 3 ) 3 9H 2 O), 6.1g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 6.2g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) and 28 g sodium citrate (NaC 6 h 5 o 7 );

[0075] Using a magnetic stirring device to stir and disperse the above solution to obtain the first product;

[0076] Dispersion conditions: temperature is 60°C...

Embodiment 3

[0097] The stoichiometric ratio of the nickel-zinc ferrite in this example is Ni 0.7 Zn 0.3 Fe 2 o 4 , the particle size is 25-40μm, and the density is 5.5g / cm 3 . The real part of the permittivity is 5.5, and the imaginary part is 0.0; the real part of the magnetic permeability is 2.1, and the imaginary part is 2.1.

[0098] Step 1: Precursor Preparation

[0099] (A) Precursor solution configuration

[0100] The precursor solution was composed of iron nitrate (Fe(NO 3 ) 3 9H 2 O), nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), sodium citrate (NaC 6 h 5 o 7 ) and distilled water;

[0101] Dosage: Add 38g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 8.6g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 3.8g zinc nitrate (Zn(NO3 ) 2 ·6H 2 O) and 23g sodium citrate (NaC 6 h 5 o 7 );

[0102] Using a magnetic stirring device to stir and disperse the above solution to obtain the first product;

[0103] Dispersion conditions: temperature is 70°C,...

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Abstract

The invention belongs to a material preparation technology, and relates to nickel zinc ferrite powder and a preparation method thereof. The expression of the nickel zinc ferrite powder is NixZn1-xFe2O4, wherein x is equal to 0.5-0.7. The preparation method comprises the following steps of: taking analytically pure iron nitrate, zinc nitrate and nickel nitrate according to a stoichiometric ratio of NixZn1-xFe2O4, simultaneously dissolving in de-ionized water, adding a certain amount of citric acid, and uniformly dispersing by using equipment such as a magnetic stirrer to obtain brown yellow mixed solution; heating the mixed solution under a certain temperature condition until a solvent is evaporated to dryness to form a brown ash-shaped material; filling the brown ash-shaped material in a muffle furnace and sintering under a certain temperature condition to obtain black sinter; and finally crushing the black sinter in a ball mill or other grinding equipment to certain particle size and sieving. The preparation process is simple and is easy to realize; and the prepared nickel zinc ferrite powder has better magnetic permeability and lower dielectric constant at the frequency band of 2GHz-4GHz and has lower density.

Description

technical field [0001] The invention belongs to material preparation technology, and relates to a nickel-zinc ferrite powder and a preparation method thereof. Background technique [0002] Lightweight broadband and high efficiency have always been the development direction of research on absorbing materials at home and abroad. While exploring the new mechanisms and concepts of new stealth materials, further improving and improving the performance of traditional absorbing materials (ferromagnetic absorbers) is the focus of research. In this research work, there are three main problems to be solved: reducing the specific gravity of the absorbent, improving low-frequency magnetic properties, and maintaining good dielectric spectrum characteristics. [0003] There are roughly two types of materials for domestic absorbent research: iron powder and ferrite. Iron powder has a large specificity and high magnetic loss, but the improvement of low-frequency magnetic properties will i...

Claims

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Application Information

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IPC IPC(8): C04B35/30C04B35/26C04B35/626
Inventor 王智勇张桐刘鹏瑞
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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