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High-performance ring shaped agglutinate rare earth ultra-magnetostriction material, manufacturing method and device thereof

A giant magnetostrictive and rare earth technology, applied in the direction of device material selection, can solve the problems of complicated operation, high difficulty, and high requirements for preparation equipment, and achieve the effect of simple equipment and process, and easy operation.

Inactive Publication Date: 2008-07-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in some of the above-mentioned preparation processes, the required preparation conditions are very harsh, and the key preparation steps need to be carried out in a vacuum environment, and the preparation equipment requires high requirements, high cost, and complicated and difficult operations.

Method used

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  • High-performance ring shaped agglutinate rare earth ultra-magnetostriction material, manufacturing method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The composition is Tb 0.3 Dy 0.70 Fe 1.95 The raw materials are placed in anhydrous ethanol protection medium, mechanically crushed and powdered, and anhydrous ethanol is extracted with petroleum ether for 2-3 times. Water and ethanol are stored for later use; when using, repeat the above extraction and drying process;

[0034](2) The epoxy resin E-44 which accounts for 5.3% of the total amount of ingredients and the alloy powder of 94% are batched, placed in an acetone solvent to fully stir and mix the mixture, while heating and evaporating the solvent, after cooling, add 0.7% of the total amount of ingredients % of polyethylene polyamine, after fully stirring, is transferred to the ring-shaped cavity mold, and the lower cavity insert 6, the raw material for filling the product 5, and the upper cavity insert 3 are placed in the cavity of the mold from bottom to top, The loading and unloading formwork 1 is plugged into the cavity 4;

[0035] (3) Under the pressu...

Embodiment 2

[0038] As shown in Example 1, the difference is that in the step (2), according to the batching of 1.8% epoxy resin and 98% alloy powder batching of the total batching amount, add 0.2% polyethylene polyamine accounting for the total batching amount, without adding The saturation magnetostriction coefficient is 774×10 when prestressed -6 , after adding 1MPa prestress, the saturation magnetostriction coefficient increases to 1070×10 -6 ;The density of the sample is 7.10g / cm 3 . The relationship curve between the magnetostriction coefficient and the intensity of the external magnetic field of the annular bonded rare earth giant magnetostrictive material prepared in this example is shown in FIG. 3 .

Embodiment 3

[0040] As shown in Example 1, the difference is that in the step (2), according to the batching of 11.5% epoxy resin and 87% alloy powder batching of the total batching amount, add polyethylene polyamine accounting for 1.5% of the total batching amount, without pre-addition The saturation magnetostriction coefficient under stress is 592×10 -6 , after adding 1MPa prestress, the saturation magnetostriction coefficient increases to 855×10 -6 ;The density of the sample is 4.69g / cm 3 .

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Abstract

The invention discloses ring bonding rare earth giant magnetostriction materials and a preparation method and a device for the ring bonding rare earth giant magnetostriction materials; wherein, an alloy ingot of TbxDy1-xFe2-y is placed into anhydrous alcohol protective media to be mechanically crushed for milling, and after the anhydrous alcohol is extracted by low boiling organic solvents and the powders go through the natural drying sieving, epoxy resin, curing agents and alloy powders are uniformly mixed according to certain mass ratio; the materials are molded by compressing of a ring cavity molding die of the invention, and are prepared by solidification and knockout after standing the die for 24 hours at room temperature, or 1 to 4 hours at the temperature of 80 to 120 DEG C. The invention has the advantages of low cost, simple technique, easy operation and especially being capable of manufacturing the present ring bonding rare earth giant magnetostriction materials which are obtained by using special methods and devices and have similar performance.

Description

Technical field: [0001] The invention relates to a rare-earth magnetic functional material and its preparation technology, in particular to a high-performance annular bonded rare-earth giant magnetostrictive material and its preparation method and device. Background technique: [0002] Rare earth-iron giant magnetostrictive material (Giant Magnetostrictive Material, GMM) is a new type of functional material firstly developed by A.E.Clark et al. of the U.S. Naval Research Institute. A typical GMM is a ternary intermetallic compound TbDyFe composed of a rare earth element (Tb), dysprosium (Dy) and a transition metal iron (Fe). The commonly used component is Tb 0.3 Dy 0.7 Fe 1.95 , the trade name is Terfenol-D. Compared with traditional acoustic materials such as piezoelectric ceramics (PZT) or magnetostrictive materials such as Ni and C, GMM has more excellent performance. It has a huge magnetostrictive strain at room temperature, and the strain is as high as 1500-2000×10 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22F3/02H01L41/16
Inventor 江民红顾正飞成钢周怀营
Owner GUILIN UNIV OF ELECTRONIC TECH
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