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Cementing magnetostrictive material and preparation thereof

A magnetostrictive material and magnetostrictive technology, applied in the direction of material selection for magnetostrictive devices, manufacture/assembly of magnetostrictive devices, manufacture/assembly of piezoelectric/electrostrictive devices, etc., can solve Problems such as large degree of freedom in size, to achieve the effect of large degree of freedom in size, regular shape, and simple preparation process

Active Publication Date: 2009-03-18
GUOKE RE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the preparation method is simple and feasible, with low cost, regular product shape and large degree of freedom in size, which overcomes the shortcomings of the traditional directional solidification process that is difficult to obtain large-size magnetostrictive materials

Method used

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  • Cementing magnetostrictive material and preparation thereof
  • Cementing magnetostrictive material and preparation thereof
  • Cementing magnetostrictive material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The bonded magnetostrictive material in this embodiment is a cylinder of Φ52.35×60 mm. The material used is a directionally solidified rare earth giant magnetostrictive rod of Φ52.25×59.9mm. The chemical formula of the rod is: (Tb 0.2 Dy 0.8 )Fe 1.8 . First, the directionally solidified rare earth giant magnetostrictive rod of Φ52.25×59.9mm was uniformly cut into 10 pieces along the diameter direction by wire cutting, and each piece had a thickness of 5mm (the width of the wire cutting slit was 0.15-0.30mm). After the slices were cleaned, they were fixed in a stainless steel mold with a gap of 0.25 mm between each slice, kept parallel to each other, and perpendicular to the base of the mold. The gap between the sheet and the stainless steel mold is 0.05mm. After a certain proportion of epoxy resin and its curing agent are evenly prepared, it is poured into the mold as a binder, and the binder is fully immersed in the gap between the sheets. Then, it is cured at roo...

Embodiment 2

[0047] The bonded magnetostrictive material in this embodiment is a cylinder of Φ32×40 mm. The material used is a directionally solidified rare earth giant magnetostrictive rod of Φ31.8×39.8mm. The chemical formula of the rod is: (Tb 0.3 Dy 0.7 )Fe 1.95 . The directionally solidified rare earth giant magnetostrictive rod of Φ31.8×39.8 mm was uniformly cut into thin slices with a thickness of 3 mm by the same method as in Example 1. After the slices were cleaned, they were fixed in a stainless steel mold with a gap of 0.2 mm between each slice, kept parallel to each other, and perpendicular to the base of the mold. The gap between the sheet and the stainless steel mold is 0.1mm. After a certain proportion of epoxy resin and its curing agent are evenly prepared, it is poured into the mold as a binder, and the binder is fully immersed in the gap between the sheets. Then, it is cured under a temperature field of 60° C. for 12 hours, and the bonded magnetostrictive material ha...

Embodiment 3

[0051] The bonded magnetostrictive material in this embodiment is a cylinder of Φ32.35×50 mm. The material used is Φ32.25×49.9mm directionally solidified rare earth giant magnetostrictive rod, the rod chemical formula: (Tb 0.3 Dy 0.7 )(Fe 0.82 co 0.09 mn 0.05 V 0.04 ) 2.2. The directionally solidified rare earth giant magnetostrictive rod of Φ32.25×49.9mm was uniformly cut into 10 pieces along the diameter direction by the same method as in Example 1, and each piece had a thickness of 3mm. After the slices were cleaned, they were fixed in a stainless steel mold with a gap of 0.25 mm between each slice, kept parallel to each other, and perpendicular to the base of the mold. The gap between the sheet and the stainless steel mold is 0.05mm. After a certain proportion of epoxy resin and its curing agent are evenly prepared, it is poured into the mold as a binder, and the binder is fully immersed in the gap between the sheets. Then, it is cured at room temperature for 24 h...

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Abstract

A bonded magnetostrictive composite material and a process for preparation belong to the technical field of magnetic functional materials and preparation, which is characterized by being formed by magnetostrictive sheets with 1-15mm thickness through bonding, wherein the major components of the magnetostrictive sheet is (Tb, Dy) Fe2 rare-earth giant magnetostrictive materials, FeGa and NiMnGa magnetostrictive composite materials. The bonded magnetostrictive composite material has excellent eddy resistance performance, and increases over 30-80% magnetostrictive property under high frequency compared with common mangetostrictive composite materials. In addition, the process for preparation has simple operation and low cost, and has regular product appearance and large freedom degree in dimension, and overcomes the disadvantage that the traditional unidirectional solidification technique hardly obtains magnetostrictive composite material in large dimension.

Description

technical field [0001] The invention relates to the technical field of magnetic functional materials and their preparation, and in particular provides a bonded magnetostrictive material and a preparation method. Background technique [0002] Magnetostrictive material is a new type of functional material whose length and volume change when it is magnetized in an external magnetic field. After removing the external magnetic field, it returns to its original length and volume. So far, the rare earth giant magnetostrictive material is a kind of magnetostrictive material with the best performance, the highest reliability and the most widely used. [0003] Rare earth giant magnetostrictive materials (Giant Magnetostrictive Materials, GMM) is a new high-efficiency functional material developed abroad in the 1980s, mainly referring to alloys based on (Tb, Dy) Fe2 compounds. Among similar products, it has the advantages of large magnetostriction coefficient, fast response speed (<...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/20H01L41/22H10N35/85H10N35/01
CPCH01L41/47H01L41/20H10N35/85H10N35/01
Inventor 李扩社于敦波李红卫李勇胜徐静袁永强李世鹏胡权霞杨红川王鹏飞
Owner GUOKE RE ADVANCED MATERIALS CO LTD
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