Compound permanent magnetic powder and method for preparing same

A technology of permanent magnet powder and rare earth permanent magnet, which is applied in the direction of magnetism of inorganic materials, can solve the problems of small exchange effect and small range of performance adjustment, and achieve the effects of shortened production cycle, low production cost and energy saving

Inactive Publication Date: 2009-11-04
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These kinds of materials are composites of permanent magnetic substances and permanent magnetic sub...

Method used

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  • Compound permanent magnetic powder and method for preparing same
  • Compound permanent magnetic powder and method for preparing same

Examples

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Embodiment 1

[0022] The composite permanent magnetic powder with good permanent magnetic properties of the present invention is composed of a rare earth permanent magnetic alloy and an iron-based soft magnetic alloy;

[0023] Among them: the mass percentage of each component in the rare earth permanent magnet alloy is: 23% Nd, 1% La, 1% B, 23% Nd, 1% La, 1% B, and the rest is Fe;

[0024] The mass percentage of each component in the iron-based soft magnetic alloy is: 2% Al, 5% Si, 0.2% Cu, 0.5% Zr, 3% B, 0.05% Pr, 0.05% P, and the rest is Fe;

[0025] The preparation processes of the two alloys are as follows:

[0026] First, according to the ingredients of the above two alloys, the ingredients are respectively prepared, wherein the purity of the raw materials Fe, Nd, Al, Cu, Zr, Si, B, Pr, La is all greater than 99.9%, and P is added in the form of an iron-phosphorus master alloy. The percentage by weight of the iron-phosphorus master alloy is 18%. The preparation processes of the two a...

Embodiment 2

[0031] The composite permanent magnetic powder of the present invention is composed of a rare earth permanent magnetic alloy and an iron-based soft magnetic alloy;

[0032] Among them: the mass percentage content of each component in the rare earth permanent magnet alloy is: 27% Nd, 3% La, 1.5% B, and the rest is Fe;

[0033] The mass percentage of each component in the iron-based soft magnetic alloy is: 5% Al, 8% Si, 0.4% Cu, 1% Zr, 5% B, 0.1% Pr, 0.1% P, and the rest is Fe;

[0034] The preparation process of the two alloy flakes is the same as in Example 1. The thin slices of two kinds of alloys that obtain are pressed rare earth permanent magnetic alloy flakes: the mass ratio of iron-based soft magnetic alloy thin flakes is 5: 1 ratio, add ball mill ball milling and press milling process, after processing time reaches 45min, just obtain composite permanent magnetic powder, powder The particle size is 0.1-0.5mm.

Embodiment 3

[0036] The composite permanent magnetic powder of the present invention is composed of a rare earth permanent magnetic alloy and an iron-based soft magnetic alloy;

[0037] Wherein: the mass percent content of each component in the rare earth permanent magnetic alloy is: 24% Nd, 2% La, 1% B, and the rest is Fe.

[0038] The mass percent content of each component in the iron-based soft magnetic alloy is: 4% Al, 6% Si, 0.3% Cu, 1% Zr, 3% B, 0.08% Pr, 0.08% P, and the rest is Fe. The preparation process of the two alloy flakes is the same as in Example 1.

[0039]The flakes of the two kinds of alloys that are obtained are pressed in the ratio of rare earth permanent magnetic alloy flakes: iron-based soft magnetic alloy flakes in a mass ratio of 6: 1, and are added to a ball mill for ball milling and pressing. After 50 minutes of processing, the composite permanent magnetic powder is obtained. The diameter is 0.1-0.5mm.

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Abstract

The invention provides a compound permanent magnetic powder with good permanent magnetic performance. The compound permanent magnetic powder has the advantages of common raw materials, low production cost and good magnetic exchange capability. The invention also provides a method for preparing the compound permanent magnetic powder, and the method is short in production period and low in production cost, and the compound permanent magnetic powder prepared by the method has good performance. The compound permanent magnetic powder is compounded by rare earth permanent magnetic alloy and iron based soft magnetic alloy, wherein the rare earth permanent magnetic alloy comprises the following components by weight: 23 to 27 percent of Nd, 1 to 3 percent of La, 1 to 1.5 percent of B, and the balancing of Fe; the iron based soft magnetic alloy comprises the following components by weight: 2 to 5 percent of Al, 5 to 8 percent of Si, 0.2 to 0.4 percent of Cu, 0.5 to 1 percent of Zr, 3 to 5 percent of B, 0.05 to 0.1 percent of Pr, 0.05 to 0.1 percent of P, and the balance of Fe; and the mass ratio of the rare earth permanent magnetic alloy to the iron based soft magnetic alloy in the compound permanent magnetic powder is 5-7:1.

Description

1. Technical field [0001] The invention relates to a composite permanent magnet powder with good permanent magnetic properties and a preparation method thereof, in particular to a magnetic powder composed of a rare earth soft magnetic alloy and a rare earth permanent magnet alloy and a preparation method thereof, belonging to the technical field of magnetic composite materials. 2. Background technology [0002] Rare earth permanent magnet materials are widely used, so they become the focus of development and research. In order to improve the performance of permanent magnetic alloys, many people use the method of compounding multiple materials. [0003] CN94104027.5 patent application discloses this novel multiphase composite permanent magnet material, and its expression is: Mainly barium and strontium permanent magnet ferrite, the weight percentage range in A is 0-70, and Y is the binder material, and the weight percentage range of the alloy is 0-20. a and b are the volum...

Claims

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Application Information

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IPC IPC(8): H01F1/01C22C1/03B22F9/02
Inventor 赵浩峰王玲倪津津刘美玲王军
Owner NANJING UNIV OF INFORMATION SCI & TECH
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