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Nickel-zinc ferrite/polyacrylic acid nano-composite material and preparation method thereof

A nano-composite material, nickel-zinc ferrite technology, applied in the magnetic field of inorganic materials, organic materials/organic magnetic materials, etc., can solve the problems of easy magnetization, easy demagnetization, low saturation magnetization, etc. The effect of simplicity, low preparation cost, and high soft magnetic properties

Active Publication Date: 2015-12-16
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, with the development of electronic products in the direction of miniaturization, it is particularly important to prepare soft magnetic ferrite with high density and fine and uniform grains, but this material is easy to magnetize and demagnetize under a weak magnetic field, such as zinc chromium ferrite Ferrite and nickel-zinc ferrite, etc., due to the low magnetic energy stored in the unit volume of ferrite, the saturation magnetization is also low (usually only 1 / 3-1 / 5 of pure iron), which limits its use in the requirements Applications in low-frequency strong current and high-power fields with higher magnetic energy density

Method used

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  • Nickel-zinc ferrite/polyacrylic acid nano-composite material and preparation method thereof
  • Nickel-zinc ferrite/polyacrylic acid nano-composite material and preparation method thereof
  • Nickel-zinc ferrite/polyacrylic acid nano-composite material and preparation method thereof

Examples

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preparation example Construction

[0023] The preparation method of nickel-zinc-iron / polyacrylic acid nanocomposite of the present invention, comprises the steps:

[0024] (1) According to Ni 0.1～1 Zn 0.1～1 Fe 1～3 o 2～6 The stoichiometric ratio is 0.1~1:0.1~1:1~3, respectively weigh nickel sulfate, zinc sulfate, and ferrous sulfate to prepare metal salt solution, configure ammonium oxalate solution with a concentration of 0.5~1.5mol / L, and the ammonium oxalate After the solution is heated to 30-50°C, a metal salt solution is added thereto, wherein the volume ratio of the ammonium oxalate solution to the metal salt solution is 2:1, and then the mixed solution is kept warm and stirred, preferably, Ni 0.1～1 Zn 0.1～1 Fe 1～3 o 2～6 The stoichiometric ratio is 0.5~1:0.5~1:2~3.

[0025] (2) Regulating the pH of the mixed solution with 6-8mol / L NaOH solution is 9-12;

[0026] (3) After the mixed solution is centrifuged to obtain the precipitate, use deionized water and absolute ethanol to clean the precipitate 2...

Embodiment 1

[0031] (1) According to Ni 0.5 Zn 0.5 Fe 2 o 4 The stoichiometric ratio is 0.5:0.5:2, respectively weigh nickel sulfate, zinc sulfate, and ferrous sulfate to prepare metal salt solution, configure ammonium oxalate solution with a concentration of 1.0mol / L, heat the ammonium oxalate solution to 40°C, and It adds a metal salt solution, wherein the volume ratio of the ammonium oxalate solution to the metal salt solution is 2:1, and then heats and stirs the mixed solution.

[0032] (2) Regulating the pH of the mixed solution with the NaOH solution of 7mol / L is 10;

[0033] (3) Centrifuge the mixed solution at a speed of 5000r / min and a time interval of 10min. After obtaining the precipitate, wash the precipitate twice with deionized water and absolute ethanol respectively.

[0034] (4) Dry the washed precipitate under vacuum condition at 60° C. for 24 hours to obtain a ferrite precursor.

[0035] (5) calcining the ferrite precursor at 200°C for 10 hours, then calcining at 800...

Embodiment 2

[0047] The steps are basically the same as in Example 1, except that the mass ratio of nickel zinc ferrite, acrylic acid, initiator, dispersant and crosslinking agent is 0.1:40:0.01:0.5:8.

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Abstract

The invention discloses a nickel-zinc ferrite / polyacrylic acid nano-composite material and a preparation method thereof. The nano-composite material is in a core-shell structure and comprises core nickel-zinc ferrite and shell polyacrylic acid; the shell polyacrylic acid coats the nickel-zinc ferrite; and the nano-composite material is represented by Ni0.1-1Zn0.1-1Fe1-3O2-6 / PAA. The preparation method of the nano-composite material mainly comprises the following steps: (1) weighing zinc sulfate, ferrous sulfate and nickel sulfate to prepare a metal salt solution, adding the metal salt solution into an ammonium oxalate solution; (2) adjusting the pH of the mixed solution, and separating and drying the mixed solution to obtain a ferrite precursor; (3) burning the ferrite precursor to obtain the nickel-zinc ferrite; and (4) mixing and reacting the nickel-zinc ferrite and acrylic acid, and separating and drying the mixture to obtain the nickel-zinc ferrite / polyacrylic acid nano-composite material. The nickel-zinc ferrite / polyacrylic acid nano-composite material has the advantages of low specific saturated magnetic field intensity, relatively low coercive force and relatively high soft magnetic property; and the preparation method disclosed by the invention is simple, feasible and low in cost.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, in particular to a nickel-zinc ferrite / polyacrylic acid nanocomposite material and a preparation method thereof. Background technique [0002] A nanocomposite material is a multiphase solid material composed of two or more substances with different physical or chemical properties, at least one of which is a nanoscale particle, grain, film or fiber in the one-dimensional direction; And the newly generated solid phase materials have different physical or chemical properties from ordinary large-scale substances. Nanocomposites can be generally divided into inorganic nanocomposites, organic / inorganic nanocomposites, and organic / organic nanocomposites according to their solid phase components. Due to the nanophases contained in the nanocomposite, there are a large number of interfaces between the matrix and the reinforcement, reinforcement. The particularity of its structure makes nanocomposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/36H01F1/42C04B35/26
Inventor 罗驹华高多多姚为王旭姜翠凤
Owner YANCHENG INST OF TECH
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