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A kind of preparation method of nickel-zinc ferrite nanometer material doped with cobalt

A technology of nickel-zinc ferrite and nanomaterials, applied in the fields of magnetic materials, nanotechnology, inorganic material magnetism, etc., can solve the problems of disadvantage, poor wave absorbing performance, high production cost of ferrite wave absorbing materials, and achieve defects. less, less agglomeration, and low cost

Active Publication Date: 2017-09-29
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the production cost of ferrite absorbing materials is very high, which is not conducive to industrial promotion in daily life. The absorbing range is mainly concentrated in the 8-18GHz frequency band, and the absorbing performance in the low-frequency S-band (2-4GHz) is not good. One of the main sources of electromagnetic radiation, the propagation of radio is concentrated in the range of 2-6GHz

Method used

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  • A kind of preparation method of nickel-zinc ferrite nanometer material doped with cobalt
  • A kind of preparation method of nickel-zinc ferrite nanometer material doped with cobalt
  • A kind of preparation method of nickel-zinc ferrite nanometer material doped with cobalt

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Embodiment 1

[0043] A preparation method of cobalt-doped nickel-zinc ferrite nanomaterials, comprising the following steps:

[0044] Step 1, Ingredients:

[0045] (1) Press Ni 0.5 Zn 0.4 co 0.1 Fe 2 o 4 Stoichiometric ratio, take 4 kinds of raw materials respectively: 3.64g analytical pure nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 2.97g analytically pure zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 0.73g analytically pure cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 20.20g of analytically pure ferric nitrate (Fe(NO 3 ) 3 9H 2 O);

[0046] (2) Dissolve the above 4 kinds of raw materials in 150mL distilled water, add 2g of polyethylene glycol, and perform ultrasonic treatment to disperse them evenly to obtain a reddish-brown mixed solution;

[0047] Step 2: generate reaction precursor;

[0048] Put the reddish-brown mixed solution in a four-necked flask, and stir continuously and uniformly at a constant temperature water bath of 30°C at a speed of 210r / min; at the same time, add 3mol / L sodium...

Embodiment 2

[0061] A preparation method of cobalt-doped nickel-zinc ferrite nanomaterials, comprising the following steps:

[0062] Step 1, Ingredients:

[0063] (1) Press Ni 0.6 Zn 0.15 co 0.25 Fe 2 o 4 Stoichiometric ratio, take 4 kinds of raw materials respectively: 4.36g analytical pure nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 1.12g analytically pure zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 1.82g analytically pure cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 20.20g of analytically pure ferric nitrate (Fe(NO 3 ) 3 9H 2 O);

[0064] (2) Dissolve the above 4 kinds of raw materials in 150mL distilled water, add 2g of polyethylene glycol, and perform ultrasonic treatment to disperse them evenly to obtain a reddish-brown mixed solution;

[0065] Step 2: generate reaction precursor;

[0066] Put the reddish-brown mixed solution in a four-necked flask, and stir continuously and uniformly at a constant temperature water bath of 40°C at a speed of 180r / min; at the same time, add 2mol / L so...

Embodiment 3

[0079] A preparation method of cobalt-doped nickel-zinc ferrite nanomaterials, comprising the following steps:

[0080] Step 1, Ingredients:

[0081] (1) Press Ni 0.4 Zn 0.4 co 0.2 Fe 2 o 4 Stoichiometric ratio, take 4 kinds of raw materials respectively: 2.91g analytical pure nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 2.97g analytically pure zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 1.46g analytically pure cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 20.20g of analytically pure ferric nitrate (Fe(NO 3 ) 3 9H 2 O);

[0082] (2) Dissolve the above 4 kinds of raw materials in 150mL distilled water, add 2g of polyethylene glycol, and perform ultrasonic treatment to disperse them evenly to obtain a reddish-brown mixed solution;

[0083] Step 2: generate reaction precursor;

[0084] Put the reddish-brown mixed solution in a four-necked flask, and stir continuously and uniformly at a constant temperature water bath of 45°C at a speed of 150r / min; at the same time, drop 1.5mol / L s...

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Abstract

A preparation method of cobalt-doped nickel-zinc ferrite nanomaterials: 1) according to NixZnyCo(1-x-y)Fe2O4 stoichiometric ratio, take nickel nitrate, zinc nitrate, cobalt nitrate and ferric nitrate, 0.75≤x +y≤0.95, 0.4≤x≤0.6, 0.15≤y≤0.4; dissolve the raw materials in distilled water and add surfactant to obtain a reddish-brown mixed solution; 2) While stirring uniformly in constant temperature water, add sodium hydroxide solution dropwise , adjust the mixed liquid pH=9~12, obtain reaction precursor; 3) Aging at normal temperature, obtain viscous aging liquid; 4) Obtain Jinghua liquid after crystallization; 5) Vacuum to obtain filter cake; 6) Baking Grinding after drying to obtain cobalt-doped nickel-zinc ferrite nanomaterials. The cobalt-doped nickel-zinc ferrite nano-material of the present invention has spherical particles, an average particle diameter of 20-30nm, and has higher magnetic permeability and lower dielectric constant in the 2-4GHz band, making up for the traditional ferrite in The defect of poor wave-absorbing effect in the low-frequency S-band range improves the wave-absorbing performance of ferrite.

Description

technical field [0001] The invention belongs to the field of manufacturing magnetic nanometer materials, in particular to a method for preparing cobalt-doped nickel-zinc ferrite nanomaterials. Background technique [0002] As a wave absorbing material, nano-spinel nickel-zinc ferrite has dual characteristics of dielectric loss and hysteresis loss. Its properties such as high resistivity, high magnetic permeability, low dielectric loss, high Curie temperature and chemical stability , play a key role in many microwave absorbing technology fields. It is mainly used in the manufacture of power switches, transformers, loading coils, radar equipment, stealth materials, electronic and microwave equipment. However, since a single ferrite is difficult to meet the requirements of absorption frequency bandwidth, light weight, and thin thickness, some additives are doped in ferrite powder to form a composite absorbent to realize microwave absorption intensity, frequency bandwidth, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00H01F1/36H01F41/02B82Y40/00H01Q17/00
CPCC01G49/0063C01P2004/03C01P2004/64C01P2006/40C01P2006/42H01F1/344H01F1/36H01F41/02H01Q17/00
Inventor 马志军张琪翁兴媛王俊策苏文贵
Owner LIAONING TECHNICAL UNIVERSITY
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