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Method of raising magnetic performance of nanometer magnetic metal material

A magnetic metal nanotechnology, magnetic nanotechnology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of not meeting the existing and potential application requirements, and achieve the improvement of microwave absorption efficiency, magnetic performance, and magnetic properties. The effect of recording density

Inactive Publication Date: 2003-01-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the original magnetic metal nanomaterials have good magnetic properties, they are far from meeting the requirements of existing and potential applications.

Method used

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  • Method of raising magnetic performance of nanometer magnetic metal material
  • Method of raising magnetic performance of nanometer magnetic metal material
  • Method of raising magnetic performance of nanometer magnetic metal material

Examples

Experimental program
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Effect test

example 1

[0014] Raw material type: nano iron particles

[0015] Geometric shape and scale: spherical particles with an average particle size of 50nm

[0016] Original saturation magnetic induction Bs: 0.157T

[0017] Heating method: open resistance furnace

[0018] Heating temperature: 473K

[0019] Cooling method and temperature: liquid nitrogen cooling to 77.35K

[0020] Saturation magnetic induction intensity Bs after treatment: 0.305T

[0021] The original saturation magnetic induction measured in this example and the processed saturation magnetic induction are given by figure 1 , figure 2 shown.

example 2

[0023] Raw material type: Co-Ni nano-alloy particles, Co:Ni is 1:4

[0024] Geometric shape and scale: spherical particles with an average particle size of 40nm

[0025] Original saturation magnetic induction Bs: 0.098T

[0026] Heating method: open resistance furnace

[0027] Heating temperature: 633K

[0028] Cooling method and temperature: liquid nitrogen cooling to 77.35K

[0029] Saturation magnetic induction intensity Bs after treatment: 0.190T

[0030] The original saturation magnetic induction measured in this example and the processed saturation magnetic induction are given by image 3 , Figure 4 shown.

example 3

[0032] Raw material type: nano-iron particles Geometric shape and size: spherical particle average particle size 50nm Original saturation magnetic induction Bs: 0.157T Heating method: open resistance furnace heating temperature: 473K Intensity Bs: 0.280T Example 4 Type of raw material: Nano-nickel particles Geometric shape and size: spherical particles with an average particle size of 50nm Original saturation magnetic induction intensity Bs: 0.081T Heating method: open resistance furnace Heating temperature: 523K Cooling method and temperature: liquid helium Saturation magnetic induction intensity Bs after cooling to 10K: 0.170T Example 5 Raw material type: nano-cobalt particles Geometric shape and size: spherical particles with an average particle size of 50nm Original saturation magnetic induction intensity Bs: 0.211T Heating method: open resistance furnace Heating temperature: 823K Cooling method and temperature: dry ice cooling to 195K saturation magnetic induction intensit...

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Abstract

The invention discloses the method for increasing the magnetic performance of the magnetic metal nano material. The magnetic nano metal material is heated to 473K-823K, then quick cooled to 273K-10K. This procedure makes magnetic induction density of the magnetic metal nano material increase the 1-2 times of the magnetic induction density of the unprocessed material. The metal iteslf still keeps original nano form, structure and chemical components. Increasing the magnetic performance can increase the density of the magnetic recording and the efficiency of absorbing microwave, also can decrease the intensity of magnetic field of leading to target needed by the medicine at the target as well as can enhance the sealing ability of the magnetic liquid.

Description

technical field [0001] The invention relates to a method for improving the magnetic properties of magnetic materials, in particular to a method for the magnetic properties of magnetic metal nanomaterials. Background technique [0002] Metal nanomaterials refer to metal materials with at least one dimension in the range of 1-100nm in the three-dimensional scale. At the nanoscale, metal nanomaterials exhibit many properties different from those at the conventional scale, and thus have many special uses. Among them, magnetic metal nanomaterials, which are important members, can be widely used in high-density magnetic recording, microwave absorption, targeted drug carriers, and magnetic liquids. At present, although the original magnetic metal nanomaterials have good magnetic properties, they are far from meeting the existing and potential application requirements. Contents of the invention [0003] The purpose of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C22F1/10H01F1/047
Inventor 柳刚秦伯雄范荣焕
Owner TIANJIN UNIV
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