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Simple and convenient functional magnetic material block and preparation method thereof

A functional material and block technology, applied in the direction of magnetic materials, magnetic objects, permanent magnets, etc., to achieve the effects of low energy consumption, easy molding, and high corrosion resistance

Inactive Publication Date: 2012-02-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited ability of amorphous formation, magnets prepared by this method have been reported in the literature so far with a size no larger than 1.5 mm.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The steps of the preparation method of the convenient magnetic functional material block are as follows:

[0016] Step 1: Fe, Co, Nd, Pr, Nb, Ti, Zr, Mo, Cr, V, W, Ta, Cu, Al, Zn, Ni, Ga, Ge, Sr, Si, Y, Tb, Dy, La, Ce, Hf, Sm, Ho and FeB alloys, according to Fe 100-w-x-y-z co w R x B y m z The alloy composition is weighed and batched according to the atomic percentage, and the raw material of the target composition is smelted several times to obtain a master alloy with a uniform composition;

[0017] Step 2: Fe obtained in Step 1 100-w-x-y-z co w R x B y m z The master alloy is broken into small pieces of Fe after descaling 100-w-x-y-z co w R x B y m z alloy;

[0018] Step 3: Use the small block Fe obtained in Step 2 100-w-x-y-z co w R x B y m z The alloy is put into a quartz tube with an opening at the lower end and a hole diameter of 0.4mm~1mm. After vacuuming, an inert gas is filled in the cavity as a protective gas, and the alloy is melted by hea...

Embodiment 1

[0021] Example 1: Preparation of Nd 8 PR 1 Fe 64 Mo 4 B 23 Magnetic functional material block

[0022] In this embodiment, the copper mold suction casting method is used to prepare Nd with a diameter of 3mm and a length of 1.5cm-3cm. 8 PR 1 Fe 64 Mo 4 B 23 A columnar magnetic functional material block.

[0023] Step 1: Nd by atomic percentage 8 PR 1 Fe 64 Mo 4 B 23 Weigh Fe with a purity of 99.9%, Nd with a purity of 99.5%, Pr with a purity of 99.5%, Mo and FeB alloys with a purity of 99.9%, put the weighed raw materials of the target components into a vacuum arc melting furnace, and vacuumize Finally, the raw material is melted by electric arc, and the melting is repeated 5 times to obtain Nd with uniform composition. 8 PR 1 Fe 64 Mo 4 B 23 master alloy.

[0024] Step 2: Take the Nd obtained in step 1 8 PR 1 Fe 64 Mo 4 B 23 The master alloy is broken into small pieces after descaling.

[0025] Step 3: Use the Nd obtained in Step 2 8 PR 1 Fe 64 Mo ...

Embodiment 2

[0027] Example 2: Preparation of Nd 7 PR 2 Fe 57 co 9 Nb 3 B 22 Magnetic functional material block

[0028] This embodiment adopts the copper mold spray casting method to prepare the Nd with a diameter of 3mm and a length of 1.5cm-3cm. 7 PR 2 Fe 57 co 9 Nb 3 B 22 A columnar magnetic functional material block.

[0029] Step 1: Nd by atomic percentage 7 PR 2 Fe 57 co 9 Nb 3 B 22 Weigh Fe with a purity of 99.9%, Co with a purity of 99.9%, Nd with a purity of 99.5%, Pr with a purity of 99.5%, Nb with a purity of 99.9%, and FeB alloy, and put the weighed target composition raw materials into a vacuum In the electric arc melting furnace, the raw material is melted by electric arc after vacuuming, and the melting is repeated 5 times to obtain Nd with uniform composition. 7 PR 2 Fe 57 co 9 Nb 3 B 22 master alloy.

[0030] Step 2: Take the Nd obtained in step 1 7 PR 2 Fe 57 co 9 Nb 3 B 22 The master alloy is broken into small pieces after descaling.

[00...

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Abstract

The invention disclose a simple and convenient functional magnetic material block and a preparation method thereof. The general chemical molecular formula of the functional magnetic material block is Fe100-w-x-y-zCowRxByMz, wherein R is one or two of Nd and Pr; M is one or more of the elements Nb, Ti, Zr, Mo, Cr, V, W, Ta, Cu, Al, Zn, Ni, Ga, Ge, Sr, Si, Y, Tb, Dy, La, Ce, Hf, Sm, and Ho; and w, x, y and z are respectively atom percent of element Co, element R, element B and element M, and the atom percent of Fe is 100-w-x-y-z. The preparation method comprises the following steps: compounding various raw materials according to the alloy chemical molecular formula, and smelting to prepare mother alloy; and then preparing the functional magnetic material block by a mould spray casting or suction casting rapid quenching process. The method for preparing the functional magnetic material block disclosed by the invention has the advantages of simple process and small energy consumption; and the obtained material block has the advantages of compact structure, good magnetic hardness and high corrosion-resisting property, and can be widely applied in the field of machinery, communication, computer, and the like.

Description

technical field [0001] The invention relates to a magnetic functional material, in particular to a simple magnetic functional material block and a preparation method thereof. Background technique [0002] Rare-earth iron-based permanent magnet materials represented by NdFeB are the new generation of permanent magnet materials with the highest energy density, the widest application and the fastest development speed. Rare earth iron-based permanent magnet materials have been widely used in energy, machinery, transportation, computers, home appliances, medical care and other fields. The degree of production, development and application has become one of the important symbols to measure the economic development level and comprehensive national strength of a modern country. The traditional permanent magnet preparation methods mainly include sintering method and bonding method. The sintering method is to obtain magnetic powder through a certain powder making process, orientate an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F1/057C22C1/03
Inventor 简红严密
Owner ZHEJIANG UNIV