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

A technology of giant magnetoresistance and nanocrystals, which is applied in the field of iron-molybdenum-based rapidly quenched nanocrystal giant magnetoresistance thin strips and its preparation, can solve the problems of high energy consumption and multiple preparation processes, and achieve low material cost and excellent preparation process. The effect of simplicity and high giant magneto-impedance performance

Inactive Publication Date: 2008-09-03
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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  • Fe-Mo quick quenched nanometer crystalline giant magneto-impedance strip and preparation method
  • Fe-Mo quick quenched nanometer crystalline giant magneto-impedance strip and preparation method
  • Fe-Mo quick quenched nanometer crystalline giant magneto-impedance strip and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0016] According to the formula Fe 71.9 Mo 3 Cu 2.8 Si 13.5 B 8.8 Weigh the material according to the proportion of chemical elements, put the weighed material into the electric arc furnace, and evacuate to 10 -3 Pa, filled with 101325 Pa argon to melt the alloy. The smelted alloy is thrown out of the thin strip by a vacuum belt throwing machine at a speed of 37 m / s. The rapidly quenched Fe 71.9 Mo 3 Cu 2.8 Si 13.5 B 8.8 Giant Magnetic Impedance ΔZ / Z of Nanocrystalline Ribbon at 71622A / m Magnetic Field and AC Frequency of 1MHz 0 The value is -45%.

Embodiment 2

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

Embodiment 3

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

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Abstract

This invention relates to one iron-molybdenum quenching nanometer crystal magnetic resistance film band and its processing method, which belongs to magnetic sensor and magnetic memory technique field. The composition formula of the invention materials is of FeMoCuSiB with atom percent value as beta=2.5-3.3, gamma=2.3-4, phi=12-14, lambda=8-10, alpha=100-beta-gamma-phi-lambda.

Description

(1) Technical field [0001] The invention relates to an iron-molybdenum-based fast-quenching state nanocrystalline giant magnetoresistance thin strip and a preparation method thereof, belonging to the technical field of magnetic sensing and magnetic storage. (2) Background technology [0002] Giant magnetoresistance effect materials can be used as the core components of magnetic sensing and magnetic head technology, and have broad application prospects in the fields of industrial robots, automation, magnetic detectors, and data storage. At present, an important giant magneto-impedance material is the Fe-Mo-Cu-Si-B nanocrystalline ribbon material obtained through annealing, and 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 fast-quenched amorphous thin strip, and then anneal in a vacuum or a protective atmosphere at a temperature of 500°C-560°C to crystallize and precipitate α-Fe(Si) nanocrystalline grains to f...

Claims

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Application Information

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Patent Type & Authority Patents(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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