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BaFe12O19/Y3Fe5O12 layered permanent magnet composite material and preparation method thereof

A bafe12o19, composite material technology, applied in the field of material science, can solve the problems of affecting the exchange coupling effect, affecting the magnetic properties, etc., and achieve the effect of uniform grain size, good compactness, and inhibition of mutual reactions

Active Publication Date: 2015-04-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uneven dispersion of the two phases in the matrix, it will affect the exchange coupling between the two phases, thereby affecting the magnetic properties.

Method used

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  • BaFe12O19/Y3Fe5O12 layered permanent magnet composite material and preparation method thereof
  • BaFe12O19/Y3Fe5O12 layered permanent magnet composite material and preparation method thereof
  • BaFe12O19/Y3Fe5O12 layered permanent magnet composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] BaFe 12 o 19 / Y 3 Fe 5 o 12 The chemical expression of the layered permanent magnet composite is (1-x)BaFe 12 o 19 / xY 3 Fe 5 o 12 , where x is Y 3 Fe 5 o 12 The mass percentage of x=11.1%.

[0037] The above BaFe 12 o 19 / Y 3 Fe 5 o 12 The preparation method of layered permanent magnetic composite material comprises the following steps:

[0038] 1) According to the general chemical formula BaFe 12 o 19 will analyze pure BaCO 3 , Fe 2 o 3 After preparation, it was mixed by wet ball milling for 4 hours, then dried, sieved, briquetting, and pre-calcined at 1150°C for 6 hours to obtain a block product, and then the obtained block product was crushed and passed through a 120-mesh sieve to obtain BaFe 12 o 19 Powder.

[0039] 2) According to the general chemical formula Y 3 Fe 5 o 12 will analyze pure Y 2 o 5 , Fe 2 o 3 After the preparation, it was mixed evenly by wet ball milling for 6 hours, then dried, sieved, briquetted, pre-fired at 1050°...

Embodiment 2

[0047] BaFe 12 o 19 / Y 3 Fe 5 o 12 The chemical expression of the layered permanent magnet composite is (1-x)BaFe 12 o 19 / xY 3 Fe 5 o 12 , where x is Y 3 Fe 5 o 12 The mass percentage of x=22.2%.

[0048] The above BaFe 12 o 19 / Y 3 Fe 5 o 12 The preparation method of layered permanent magnetic composite material comprises the following steps:

[0049] 1) According to the general chemical formula BaFe 12 o 19 will analyze pure BaCO 3 , Fe 2 o 3 After preparation, it was mixed by wet ball milling for 5 hours, then dried, sieved, briquetting, and pre-calcined at 1160°C for 5 hours to obtain a block product, and then the obtained block product was crushed and passed through a 120-mesh sieve to obtain BaFe 12 o 19 Powder.

[0050] 2) According to the general chemical formula Y 3 Fe 5 o 12 will analyze pure Y 2 o 5 , Fe 2 o 3 After preparation, it was mixed evenly by wet ball milling for 5 hours, then dried, sieved, briquetted, pre-fired at 1100°C fo...

Embodiment 3

[0058] BaFe 12 o 19 / Y 3 Fe 5 o 12 The chemical expression of the layered permanent magnet composite is (1-x)BaFe 12 o 19 / xY 3 Fe 5 o 12 , where x is Y 3 Fe 5 o 12 The mass percentage of x=33.3%.

[0059] The above BaFe 12 o 19 / Y 3 Fe 5 o 12 The preparation method of layered permanent magnetic composite material comprises the following steps:

[0060] 1) According to the general chemical formula BaFe 12 o 19 will analyze pure BaCO 3 , Fe 2 o 3 After preparation, it was mixed by wet ball milling for 6 hours, then dried, sieved, briquetting, and pre-calcined at 1200°C for 4 hours to obtain a block product, and then the obtained block product was crushed and passed through a 120-mesh sieve to obtain BaFe 12 o 19 Powder.

[0061] 2) According to the general chemical formula Y 3 Fe 5 o 12 will analyze pure Y 2 o 5 , Fe 2 o 3 After preparation, it was mixed evenly by wet ball milling for 5 hours, then dried, sieved, briquetted, pre-fired at 1060°C fo...

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Abstract

The invention discloses a BaFe12O19 / Y3Fe5O12 layered permanent magnet composite material and a preparation method thereof. The preparation method comprises the following steps: granulating BaFe12O19 powder and Y3Fe5O12 powder, cofiring the BaFe12O19 powder and Y3Fe5O12 powder together according to a base superposition mode, thereby obtaining the composite material. According to the structure, the content of the piezomagnetic phase can be adjusted in a wide range, so that the saturation magnetization is increased to a certain degree, the residual magnetization is increased, and the defect that the mutual reaction between the two phases cannot be effectively inhibited because an exchange coupling effect cannot be fully achieved between the two phases of the BaFe12O19 powder and Y3Fe5O12 powder during 0-3 compounding in the prior art can be overcome. According to the preparation method disclosed by the invention, a simple physical mixing mode is adopted, the process is simple, and large-scale production is easily realized.

Description

technical field [0001] The invention belongs to the field of material science and relates to a BaFe 12 o 19 / Y 3 Fe 5 o 12 Layered permanent magnetic composite material and its preparation method. Background technique [0002] With the rapid development of mobile communication and computer technology, various electronic devices have become more highly integrated, multi-functional, miniaturized and responsive. Since the miniaturization and miniaturization of electronic equipment is an inevitable trend, there is an urgent need for a material to have two or more properties at the same time, so as to reduce the consumption of limited space on the circuit board and further realize miniaturization. And with applied magnetism as the theoretical basis of technology, it has become indispensable in the modern high-tech group by interpenetrating, intersecting and interlinking with other science and technology. In industrial production, permanent magnets are required to have as la...

Claims

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Application Information

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IPC IPC(8): C01G49/00
Inventor 杨海波刘淼林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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