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Iron-nickel alloy/nickel ferrite magnetic composite nanofiber and preparation method thereof

A technology of magnetic composite nanometer and nickel ferrite, which is applied in fiber processing, spinning solution preparation, inorganic material magnetism, etc., to achieve the effects of high strength, widening absorption of electromagnetic waves, and easy control of the reaction process.

Inactive Publication Date: 2010-10-06
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the development of nanotechnology, people have successfully synthesized a variety of ferroalloy and spinel composites with high dispe

Method used

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  • Iron-nickel alloy/nickel ferrite magnetic composite nanofiber and preparation method thereof
  • Iron-nickel alloy/nickel ferrite magnetic composite nanofiber and preparation method thereof
  • Iron-nickel alloy/nickel ferrite magnetic composite nanofiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 (Ni / Fe=0.5 in the raw material, calcination at 550°C for 2h in air, reduction at 300°C in hydrogen for 1h)

[0027] Step 1: Add 0.5000g polyvinylpyrrolidone (PVP) to 4.5000g absolute ethanol (CH 3 CH 2 OH, analytically pure), the polymer was completely dissolved by magnetic stirring for about 1 hour, and then 0.7645 g of iron nitrate (Fe(NO 3 ) 3 9H 2 O, analytically pure), 0.2355g nickel acetate (Ni(CH 3 COO) 2 4H 2 O, analytically pure) and 2.0000g deionized water, and finally continue magnetic stirring for about 20 hours to form a uniform and stable precursor solution, wherein the concentration of PVP is 6.25wt%, and the concentration of metal salt is 12.5wt%.

[0028]Step 2: Transfer the obtained precursor solution to a plastic syringe with a stainless steel needle with an outer diameter of 0.8 mm. The stainless steel needle is connected to the positive pole of the high-voltage power supply, and the aluminum foil is used as a receiver to connect to t...

Embodiment 2

[0030] Example 2 (Ni / Fe=0.6 in the raw material, calcination at 550°C for 2h in air, reduction at 300°C in hydrogen for 1h)

[0031] Step 1: Add 0.5000g of PVP into 4.5000g of absolute ethanol, stir for about 1 hour to completely dissolve the polymer, then add 0.7285g of ferric nitrate, 0.2715g of nickel acetate and 2.0000g of deionized water, and finally continue magnetic stirring After about 20 hours, a uniform and stable precursor solution was formed, wherein the concentration of PVP was 6.25wt%, and the concentration of metal salt was 12.5wt%.

[0032] Step 2 is identical with embodiment 1 step 2;

[0033] Step 3 is the same as Step 3 of Example 1, and the diameter of the synthesized iron-nickel alloy / nickel ferrite composite nanofiber is about 140-190 nm.

Embodiment 3

[0034] Example 3 (Ni / Fe=0.85 in the raw material, calcination at 550°C for 2h in air, reduction at 300°C in hydrogen for 1.5h)

[0035] Step 1: Add 0.5000g of PVP to 4.5000g of absolute ethanol, stir for about 1 hour to completely dissolve the polymer, then add 0.6557g of ferric nitrate, 0.3443g of nickel acetate and 2.0000g of deionized water, and finally continue magnetic stirring After about 20 hours, a uniform and stable precursor solution was formed, wherein the concentration of PVP was 6.25wt%, and the concentration of metal salt was 12.5wt%.

[0036] Step 2 is identical with embodiment 1 step 2;

[0037] Step 3 is basically the same as Step 3 of Example 1, but the reduction time in a hydrogen atmosphere is changed to 1.5 hours. The diameter of the synthesized iron-nickel alloy / nickel ferrite composite nanofiber is about 100-160nm.

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Abstract

The invention relates to the field of magnetic nano composite materials, and discloses a iron-nickel alloy/nickel ferrite magnetic composite nanofiber and a preparation method thereof. The diameter of the composite nanofiber is 50-300 nm. The preparation method adopts a electrostatic spinning technique and comprises the following steps: using water and ethanol as solvents and polyvinyl pyrrolidone (PVP) as a complex agent, reacting PVP with nickel salts and ferric salts to preparing a precursor solution; electrostatic-spinning to prepare a precursor fiber; drying, carrying out heat treatment in the air atmosphere, and carrying out reduction treatment on the product in the hydrogen atmosphere under appropriate conditions, thereby obtaining the ferronickel/nickel ferrite magnetic composite nanofiber. The method and the route have the advantages of easy control of reaction process, low sintering temperature, simple device and technique, convenient operation, small environmental effect and the like. The method and the technical line are also applicable to preparation of composite nano fiber materials of other magnetic metal or alloy and ferrite.

Description

technical field [0001] The invention relates to the field of magnetic nanocomposite materials, in particular to a chemical composition of Fe x Ni 1-x / (Ni y Fe 1-y )Fe 2 o 4 Alloy / nickel ferrite ceramic composite nanofiber and preparation method thereof. Background technique [0002] A composite material is a multiphase solid material composed of two or more substances with different physical and chemical properties. Although the composite component materials maintain their relative independence, the performance of the composite material is not a simple sum of the properties of the component materials, but has an important improvement. The composite material can not only maintain some characteristics of the raw materials, but also play a combined role. After the new features, it can be designed according to the needs, so as to achieve the performance required by the use most reasonably. Features: It can make full use of the advantages of various constituent materials,...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D1/02D01D5/00D01D10/02H01F1/33H01F1/09
Inventor 向军沈湘黔宋福展刘明权
Owner JIANGSU UNIV
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