A method for preparing magnetically sensitive material with high sensitivity and wide linear region

A technology of magnetic sensitive material and linear region, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of difficulty in ensuring the consistency of batch products and different batch products, inability to guarantee linear response, low sensitivity, etc. The effect of material properties, less process parameters and simple process

Active Publication Date: 2018-05-15
杭州仁才汇科技成果转化服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The as-cast FeCoNbSiB amorphous alloy has a wide response range to the magnetic field, but the sensitivity is not high, and the linear response cannot be guaranteed
Recently, two new patents: 201110026317.9 and 201110028111.X disclose a method for preparing magnetically sensitive materials with high sensitivity and wide linear range. Although the new technologies disclosed in these two patents can achieve high sensitivity and wide linear range The goal of the two advantages, but the technology used requires annealing in an environment where oxygen and water coexist, and requires effective control of the oxidation degree and internal structure of the material surface layer, so the process requirements are relatively high, the control is difficult, and it is not easy to guarantee batches. Consistency between products and different batches of products, that is, it is relatively difficult to carry out industrial transformation

Method used

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  • A method for preparing magnetically sensitive material with high sensitivity and wide linear region
  • A method for preparing magnetically sensitive material with high sensitivity and wide linear region
  • A method for preparing magnetically sensitive material with high sensitivity and wide linear region

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Experimental program
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Effect test

Embodiment 1

[0036] Prepare the magnetic sensitive material of embodiment 1 of the present invention as follows:

[0037] 1. Selection of master alloy: The composition of master alloy includes 73.5 atomic percent Fe, 1.0 atomic percent Cu, 3.0 atomic percent Nb, 13.5 atomic percent Si and 9.0 atomic percent B in atomic ratio.

[0038] 2. The amorphous alloy thin strip of the present invention is prepared by single-roll rapid quenching technique comprising the following sub-steps.

[0039] (a) Put the master alloy composed of the above atomic ratio into a quartz glass tube whose softening temperature is higher than 1400°C.

[0040] (b) Under the protection of argon, heat the master alloy by high-frequency induction until it melts, and continue to heat until superheated.

[0041] (c) Ventilate and pressurize the molten alloy to spray from the nozzle at the bottom of the quartz glass tube to the smooth surface of the cooling roll rotating at high speed, so that the molten alloy liquid is coo...

Embodiment 2

[0046] Prepare the magnetic sensitive material of embodiment 2 of the present invention as follows:

[0047] Change the stress in Example 1 to 183MPa, and other operations are the same as Example 1 to prepare the magnetic sensitive material of Example 2.

[0048] image 3 It is the longitudinal driving giant magneto-impedance curve of the sample in Example 2.

[0049] The test results show that the maximum giant magneto-impedance ratio is 909%, the linear range with a linear correlation coefficient of 0.998 is 70-700A / m, the width of the linear range is 630A / m, and the sensitivity is 163% / Oe.

Embodiment 3

[0051] Prepare the magnetic sensitive material of embodiment 3 of the present invention as follows:

[0052] 1. Selection of the master alloy: the composition of the master alloy includes 76% atomic ratio of Fe, 1.9 atomic% of C, 5% of atomic ratio of P, 7.6% of atomic ratio of Si and 9.5% of atomic ratio of B.

[0053] 2. The amorphous alloy thin strip of the present invention is prepared by single-roll rapid quenching technique comprising the following sub-steps.

[0054] (a) Put the master alloy composed of the above atomic ratio into a quartz glass tube whose softening temperature is higher than 1400°C.

[0055] (b) Under the protection of argon, heat the master alloy by high-frequency induction until it melts, and continue to heat until superheated.

[0056] (c) Ventilate and pressurize the molten alloy to spray from the nozzle at the bottom of the quartz glass tube to the smooth surface of the cooling roller rotating at high speed, so that the molten alloy liquid is coo...

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Abstract

The invention discloses a new method for preparing magnetically sensitive materials with high sensitivity and wide linear area. Compared with the existing technology, the technology of the present invention can be used to prepare magnetically sensitive materials with the advantages of wide linear area and high sensitivity at the same time. It has the advantages of simple process and easy control. There are few process parameters that need to be controlled, and it has the advantages of easy control of material properties and energy saving. There is no need to increase the processing temperature or increase the heat treatment time. Therefore, the present invention has significant energy saving advantages. Since the process is simple and easy to control, it requires The production equipment is simple, the cost is low, and it is easy to ensure the consistency of batch products. Therefore, it has the advantages of easy promotion and industrial transformation.

Description

technical field [0001] The invention relates to a method for preparing a magnetosensitive material, in particular to a method for preparing a magnetosensitive material with high sensitivity and wide linear region. Background technique [0002] Sensitivity and linear region are two important technical indicators of magnetic sensitive materials. Many applications hope that magnetic sensitive materials have both advantages of high sensitivity and wide linear region. High-quality materials tend to have a narrow linear region, while those with a wide response region often have low sensitivity, and cannot guarantee a linear response to a magnetic field in a wider range. Amorphous and nanocrystalline magnetic sensitive materials are current research hotspots. People usually use nanocrystalline methods to improve the magnetic sensitive properties of materials. The magnetoresistance effect of alloy (FINEMET) has high sensitivity, but its linear response range is very narrow. The as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153C22C45/02C21D1/26C21D1/74
CPCC21D1/26C21D1/74C21D2201/00C21D2201/03C22C45/02H01F1/15308H01F1/1535
Inventor 郑金菊方允樟吴锋民叶慧群寇建龙赵静范晓珍孙怀君
Owner 杭州仁才汇科技成果转化服务有限公司
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