Cobalt-based amorphous giant magneto-impedance ribbon and preparation method thereof

A technology of giant magneto-impedance and thin strips, applied in the preparation of the giant magneto-impedance thin strips, in the field of cobalt-based amorphous giant magneto-impedance thin strips, can solve problems such as difficult popularization, complex thin film preparation process, difficulty in controlling composition uniformity, etc. problems, to achieve excellent soft magnetic properties and toughness, improve production efficiency, and save processing costs.

Active Publication Date: 2011-07-27
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, some scholars have conducted research on giant magneto-impedance thin films. The thin film material can promote the miniaturization of devices, but the preparation process of the thin film is complicated, and it is difficult to control the uniformity of the composition, so it is not easy to popularize.

Method used

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  • Cobalt-based amorphous giant magneto-impedance ribbon and preparation method thereof
  • Cobalt-based amorphous giant magneto-impedance ribbon and preparation method thereof
  • Cobalt-based amorphous giant magneto-impedance ribbon and preparation method thereof

Examples

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Embodiment 1

[0022] Embodiment 1, the material composition of this example is composed of Co 66 Fe 4 V 2 Si 8 B 20 , according to the composition of chemical elements, the purity of the raw materials is ≥99.9%, put the prepared raw materials into the vacuum induction melting furnace, vacuumize, when the vacuum degree reaches 0.01Pa, fill with argon gas with a purity of 99.99%, and the air pressure is controlled at 1.2 atmospheric pressure, the melting temperature is about 1300 ℃, the time is 25 minutes, and the master alloy is obtained by cooling with the furnace.

[0023] Put the smelted master alloy into a quartz tube with a hole at the bottom, and place the quartz tube in an intermediate frequency induction furnace for secondary smelting. When the alloy temperature reaches 1320°C, fill with 99.99% argon and keep the pressure in the furnace. 1.2 atmospheric pressure, the spacing between the protection roller nozzles is 0.3-0.5mm, the molten alloy is sprayed onto the rotating water-co...

Embodiment 2

[0025] Embodiment 2, the material composition of this example is composed of Co 64 Fe 3 V 3 Si 10 B 20 , according to the composition of chemical elements, the purity of the raw materials is ≥99.9%, put the prepared raw materials into the vacuum induction melting furnace, vacuumize, when the vacuum degree reaches 0.01Pa, fill with argon gas with a purity of 99.99%, and the air pressure is controlled at 1.2 atmospheric pressure, the melting temperature is about 1250 ℃, the time is 20 minutes, and the master alloy is obtained by cooling with the furnace.

[0026] Put the smelted master alloy into a quartz tube with a hole at the bottom, and place the quartz tube in an intermediate frequency induction furnace for secondary smelting. When the alloy temperature reaches 1350 °C, fill with 99.99% argon and keep the pressure in the furnace. At 1.4 atmospheric pressure, the spacing between the protection roller nozzles is 0.3-0.5mm, the molten alloy is sprayed onto the rotating wat...

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Abstract

The invention discloses a cobalt-based amorphous giant magneto-impedance ribbon which is characterized in that the ribbon is made from a cobalt-based amorphous material as raw materials and obtained by taking the steps of orderly smelting, rapid quenching and current heating rapid annealing heat treatment, wherein a direct-current magnetic field is applied during the heat treatment, the expression of the components of the cobalt-based amorphous material is Co(alpha)Fe(beta)V(gamma)Si(delta)B(epsilon), beta is equal to 0-5, gamma is equal to 0-3, epsilon is equal to 12-20, delta is equal to 5-10, both beta and gamma are not equal to 0, and alpha plus beta plus gamma plus delta plus epsilon is equal to 100. The invention also discloses a preparation method of the giant magneto-impedance ribbon. Compared with the prior art, the cobalt-based amorphous giant magneto-impedance ribbon has the advantages that the cobalt-based alloy with excellent soft magnetic property and mechanical propertyis used as mother alloy and current heating rapid annealing treatment under magnetic field condition is carried out so that the processing cost is saved, the production efficiency is improved and theobtained material has higher giant magneto-impedance change rate and magnetic field sensitivity while having excellent soft magnetic property and flexibility.

Description

technical field [0001] The invention relates to a cobalt-based amorphous giant magneto-impedance thin strip, and also relates to a preparation method of the giant magneto-impedance thin strip, which belongs to the technical field of giant magneto-impedance materials. Background technique [0002] In 1992, Mori Yoshio of Nagoya University, Japan, etc., first worked on amorphous Co. 70.5 Fe 4.5 Si 1.5 B 10 The giant magneto-impedance effect was found in silk, and it has attracted great attention from scientists all over the world. Giant magneto-impedance effect materials can be used as the core components of magnetic sensing and magnetic head technology, and have broad application prospects in industrial robots, automation, magnetic detectors, data storage and other fields. [0003] With the wide application of iron-based / nanocrystalline soft magnetic materials, many scholars have carried out research work on iron-based / nanocrystalline giant magneto-impedance materials, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/04C22F1/10H01F1/01
Inventor 纪松张延松鼎昂钱坤明李明利
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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