Quenching state nano-giant magnetic impedance thin band material and its preparation method

A giant magneto-impedance and thin strip technology, which is applied in the field of quenched nano-scale giant magneto-impedance thin strip materials and its preparation, can solve the problems of energy consumption and high material production costs, and achieve high performance of giant magneto-impedance, energy saving, and preparation The effect of simple process

Inactive Publication Date: 2006-01-04
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, annealing consumes energy, and the sample must not be oxidized during annealing, which will bring higher material production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: The material composition of quenched state nanometer giant magnetoresistance thin strip is Fe 71 co 1 Cu 2.5 Nb 3 Si 13.5 B 9

[0017] According to the formula Fe 71 co 1 Cu 2.5 Nb 3 Si 13.5 B 9 Weigh the material according to the proportion of chemical elements, put the material into the electric arc furnace, and evacuate to 10 -3 Pa, filled with argon at an atmospheric pressure 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 measured Fe 71 co 1 Cu 2.5 Nb 3 Si 13.5 B 9 Impedance change rate ΔZ / Z of quick-quenched thin strip at AC frequency f=1MHz and magnetic field 7162A / m 0 for -50%.

Embodiment 2

[0018] Embodiment 2: The material composition of the quenched state nanometer giant magnetoresistance thin strip is Fe 72.1 Cu 2.4 Nb 3 Si 13.5 B 9

[0019] According to the formula Fe 72.1 Cu 2.4 Nb 3 Si 13.5 B 9 Weigh the material according to the proportion of chemical elements, put the material into the electric arc furnace, and evacuate to 10 -3 Pa, filled with argon at an atmospheric pressure to melt the alloy. The smelted alloy is thrown out of the thin strip by a vacuum belt throwing machine at a speed of 39 m / s. The measured Fe 72.1 Cu 2.4 Nb 3 Si 13.5 B 9 Impedance change rate ΔZ / Z of quick-quenched strip at AC frequency f=1MHz and magnetic field 7162A / m 0 was -41%.

Embodiment 3

[0020] Embodiment 3: The material composition of quenched state nanometer giant magnetoresistance thin strip is Fe 72.7 Cu 2.3 Nb 3 Si 13.5 B 8.5

[0021] According to the formula Fe 72.7 Cu 2.3 Nb 3 Si 13.5 B 8.5 Weigh the material according to the proportion of chemical elements, put the material into the electric arc furnace, and evacuate to 10 -3 Pa, filled with argon at an atmospheric pressure 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 measured Fe 72.7 Cu 2.3 Nb 3 Si 13.5 B 8.5 Impedance change rate ΔZ / Z of quick-quenched thin strip at AC frequency f=1MHz and magnetic field 7162A / m 0 is -25%.

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PUM

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Abstract

A quenched nano-class thin tape material with higher giant-magnetic impedance and its preparing process are disclosed. Said material is FeCoCuNbSiB, and is prepared through vacuum smelting and centrifugal shaping.

Description

(1) Technical field [0001] The invention relates to a quenched nano giant magnetoresistance thin strip material and a preparation method thereof, belonging to the technical field of magnetic sensing and magnetic storage. (2) Background technology [0002] The giant magneto-impedance effect material is a very important functional material, which can be applied to magnetic sensing materials and magnetic head materials, and has broad development prospects. At present, an important nanometer giant magneto-impedance effect ribbon material is Fe-Cu-Nb-Si-B, and its standard formula is Fe 74.5-t Cu t Nb 3 Si 13.5 B 9 , where the atomic percentage t of Cu is 0.5-1.5, and its best giant magnetoresistance effect corresponds to the material with t=1. The corresponding material preparation method is firstly preparing the quenched strip material, and then annealing for 20-60 minutes at a temperature of 500-600° C. under vacuum or a protective atmosphere. Of course, annealing consum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16B22D11/06H01F1/04H01F1/16
Inventor 胡季帆李波秦宏伟
Owner SHANDONG UNIV
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