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Annealing device and annealing method for improving impedance effect of soft magnetic material

A technology of soft magnetic materials and annealing devices, applied in the field of magnetic sensors, can solve the problems of poor promotion and expensive equipment, and achieve the effects of low cost, increased magnetic impedance ratio, and reduced hysteresis

Active Publication Date: 2011-04-27
北京鼎臣世纪超导科技有限公司
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Problems solved by technology

Compared with the traditional annealing method, it has the advantages of non-contact, fast execution (only a few microseconds) and no need for any atmosphere. It is considered the best way to improve the magnetoresistance effect, but its equipment is expensive, so it cannot be used very well. to promote

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  • Annealing device and annealing method for improving impedance effect of soft magnetic material
  • Annealing device and annealing method for improving impedance effect of soft magnetic material
  • Annealing device and annealing method for improving impedance effect of soft magnetic material

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Embodiment

[0064] Example: CoFeSiB ribbons are annealed using the annealing device of the present invention.

[0065] Fix the CoFeSiB tape on the ceramic plate, put it into the measured uniform temperature zone in the quartz tube 8, cover the quartz cap 803 at the front end of the quartz tube 8, and pass argon gas through the front end of the quartz tube 8, and use the temperature controller 7 Heating the heating belt 5 and controlling the temperature controller 7 at 450°, and then applying a DC magnetic field in the axial direction of the quartz tube 8 through the Helmertz coil 4 to control the direction of the easy magnetic axis of the CoFeSiB belt and change the direction of the CoFeSiB belt The anisotropy of the CoFeSiB strip can be achieved to change the magnetoresistance effect of the CoFeSiB strip. After the CoFeSiB strip is heated for a certain period of time, it is naturally cooled to room temperature and taken out.

[0066] Such as Figure 6a and Figure 6b Shown are the impe...

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Abstract

The invention discloses an annealing device and an annealing method for improving impedance effect of a soft magnetic material. The annealing device comprises two wire spools, a bracket, a first K-type thermocouple, a Helmholtz coil, a heating tape, a Helmholtz coil regulated power supply, a temperature controller, a quartz tube and a quartz tube sleeve; and the soft magnetic material is annealed by the following five steps of: calibrating a uniform temperature area inside the quartz tube; putting the soft magnetic material to be annealed on an overlapped part of the uniform temperature area and a magnetic field area inside the quartz tube; continuously introducing gas into the quartz tube; heating the soft magnetic material; and taking the annealed soft magnetic materials out. The annealing device is low in cost and can provide a thermal uniform area by winding the heating tape and accurately control the temperature through the temperature controller; and the magneto-impedance rate of the soft magnetic material can be improved, and magnetic hysteresis of the material is reduced simultaneously.

Description

technical field [0001] The invention relates to the field of magnetic sensors, specifically, it is a method of changing the magnetic domain structure of magnetic wires, magnetic tapes, and film materials, thereby changing the magnetic anisotropy properties of materials, and effectively improving the performance of wires, tapes, and film materials. Annealing device and annealing method for impedance change effect. Background technique [0002] Magnetic sensors have always played an important role in modern technology and are widely used in engineering and industrial fields, such as biomagnetic measurement, geomagnetic navigation, and earth exploration. There are many principles used to realize magnetic sensors, such as Hall effect, magnetoresistance effect, giant magnetoresistance effect, giant magnetoresistance effect, nuclear precession, superconducting quantum interferometer, magnetoelastic effect, etc. Rarely, the giant magneto-impedance (GMI) magnetic sensor is one of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D9/52C21D1/04C21D11/00
Inventor 王三胜郭恺
Owner 北京鼎臣世纪超导科技有限公司
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