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Novel rareearth super magnetostrictive material and preparation method thereof

A giant magnetostrictive and rare earth technology, which is applied in the selection of materials for magnetostrictive devices, magnetic materials, device materials, etc., can solve the complex preparation process and equipment, high requirements for raw material purity, and limited raw material sources and other problems, to achieve the effect of strong price competitiveness, good re-linearity and high energy density

Inactive Publication Date: 2007-12-19
ZHEJIANG YONGBANG NEW MATERIALS
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the invention still has some disadvantages, such as relatively high requirements on the purity of raw materials, limited source of raw materials, complicated preparation process and equipment, etc.

Method used

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  • Novel rareearth super magnetostrictive material and preparation method thereof
  • Novel rareearth super magnetostrictive material and preparation method thereof

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Experimental program
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Embodiment 1-4

[0043] The industrial pure iron with the brand name TD produced by China Baoshan Iron and Steel Co., Ltd. is made by desulfurizing, dephosphorizing and desiliconizing the blast furnace molten iron in the molten iron ladle, and then pouring it into the converter for oxygen blowing decarburization and further desiliconization. etc. Finally, the industrial pure iron obtained by vacuum treatment in the RH vacuum treatment equipment, its main components are shown in Table 1. Rare earth metals Tb, Dy, Sm, Ho produced by China Jiangxi Rare Earth Research Institute are smelted according to the method of the present invention in a set of vacuum smelting equipment by the target composition batching in Table 2. The magnetostrictive properties of the alloy were measured by the resistance strain gauge method, and the results are shown in Figure 1.

[0044] Table 1. The main components of industrial pure iron with brand TD

[0045] C

mn

Si

P

S

Cr

Ni

...

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Abstract

This invention provides a new type of rare earth supermagnetostrictive material prepared by an iron source replaicng electrolytic pure iron or H reduced pure iron by industrial pure iron with the chemical composition of (Tbx1 Dyx2 Smx3 Hox4 Rx5) Sy1Py2Fe1-y1-y2-yeTy3) Q. This invention also provides a preparation method of the said material and the application of industrial pure iron in preparing the material. Application of this invented method enlarges source of material and reduces cost, impurity content in final product can be controlled at the lowest level since most of them carried by gas can be removed finally.

Description

technical field [0001] The invention relates to a rare earth giant magnetostrictive material. More precisely, the present invention relates to a rare earth giant magnetostrictive material prepared by using industrial pure iron instead of electrolytic pure iron or hydrogen reduction pure iron as an iron source; it also relates to the preparation method and Application of industrial pure iron in the preparation of rare earth giant magnetostrictive materials. Background technique [0002] Magnetostrictive materials, such as nickel, cobalt, iron and their alloys, change in shape along the direction of the magnetic field at room temperature and under the action of a magnetic field, that is, the so-called magnetostriction; its magnetostriction coefficient is only tens of ppm, but these The material was also the primary source material for early transducers. Research in the early 1960s found that some heavy rare earth elements have magnetostriction coefficients 1000 times larger ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/20C22C28/00H01F1/055
CPCH01L41/20H01F1/055H10N35/85
Inventor 刘铮
Owner ZHEJIANG YONGBANG NEW MATERIALS