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Fe-Mo quick quenched nanometer crystalline giant magneto-impedance strip and preparation method

A giant magneto-impedance and nanocrystalline technology, which is applied in the field of iron-molybdenum-based fast-quenching nanocrystalline giant magneto-impedance thin strips and preparation, can solve the problems of high energy consumption and many preparation processes, and achieves low material cost and high preparation technology. Simple, high-performance giant magneto-impedance effect

Inactive Publication Date: 2006-07-26
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of many material preparation processes and high energy consumption in the prior art, the present invention provides an iron-molybdenum-based rapidly quenched nanocrystalline giant magnetoresistance thin strip without annealing and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] According to the recipe Fe 71.9 Mo 3 Cu 2.8 Si 13.5 B 8.8 The chemical element ratio of the material is weighed, and the weighed material is put into the electric arc furnace, and the vacuum is evacuated to 10 -3 Pa, filled with 101325 Pa argon, and smelted the alloy. The smelted alloy was thrown out of the thin strip by the vacuum strip machine at a speed of 37 m / s. The rapidly quenched Fe was measured 71.9 Mo 3 Cu 2.8 Si 13.5 B 8.8 Giant Magnetoimpedance ΔZ / Z of Nanocrystalline Ribbon at 7162A / m Magnetic Field at AC Frequency of 1MHz 0 The value is 45%.

Embodiment 2

[0018] According to the recipe Fe 72.4 Mo 3 Cu 2.3 Si 13.5 B 8.8 The chemical element ratio of the material is weighed, and the weighed material is put into the electric arc furnace, and the vacuum is evacuated to 10 -3 Pa, filled with 101325 Pa argon, and smelted the alloy. The smelted alloy is thrown out of the thin strip by the vacuum strip machine at a speed of 35 m / s. The rapidly quenched Fe was measured 72.4 Mo 3 Cu 2.3 Si 13.5 B 8.8 Giant Magnetoimpedance ΔZ / Z of Nanocrystalline Ribbon at 7162A / m Magnetic Field at AC Frequency of 1MHz 0 The value is -20%.

Embodiment 3

[0020] According to the recipe Fe 70.7 Mo 3 Cu 4 Si 13.5 B 8.8 The chemical element ratio of the material is weighed, and the weighed material is put into the electric arc furnace, and the vacuum is evacuated to 10 -3 Pa, filled with 101325 Pa argon, and smelted the alloy. The smelted alloy is thrown out of the thin strip by the vacuum strip machine at a speed of 40 m / s. The rapidly quenched Fe was measured 70.7 Mo 3 Cu 4 Si 13.5 B 8.8 Giant Magnetoimpedance ΔZ / Z of Nanocrystalline Ribbon at 7162A / m Magnetic Field at AC Frequency of 1MHz 0 The value is -16%.

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PUM

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Abstract

This invention relates to one iron-molybdenum quenching nanometer crystal magnetic resistance film band and its process method, which belongs to magnetic sensor and magnetic memory technique field. The composition formula of the invention materials is of Feª‡Moª‰Cuª†SiªŽBª™ with atom percent value as ª‰ú¢2.5í½3.3,ª†ú¢2.3í½4,ªŽú¢12í½14,ª™ú¢8í½ 10,ª‡ú¢100-ª‰-ª†-ªŽ-ª™

Description

(1) Technical field [0001] The invention relates to an iron-molybdenum-based fast-quenching state nanocrystalline giant magneto-impedance thin ribbon and a preparation method, and belongs to the technical field of magnetic sensing and magnetic storage. (2) Background technology [0002] The giant magneto-impedance effect material can be used as the core component of magnetic sensing and magnetic head technology, and has broad application prospects in the fields of industrial robots, automation, magnetic detectors, and data storage. At present, an important giant magneto-impedance material is Fe-Mo-Cu-Si-B nanocrystalline thin ribbon material obtained by annealing. The general formula is Fe 73.5 Mo 3 Cu 1 Si 13.5 B 9 . The material preparation method is to first prepare a rapidly quenched amorphous thin ribbon, and then anneal it in a vacuum or a protective atmosphere at a temperature of 500°C to 560°C, and crystallize and precipitate α-Fe(Si) nanocrystalline grains to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/04H01F1/14H01F41/00
Inventor 李波胡季帆秦宏伟韩伟蒋民华
Owner CENT IRON & STEEL RES INST
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