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Method for preparing high-precision and high-stability temperature control manganese zinc (Mn-Zn) soft magnetic ferrite material and magnetic core product obtained thereby

A manganese-zinc soft magnet with high stability technology, which is applied in the field of preparation of manganese-zinc MnZn soft ferrite materials, can solve the problems of low device temperature control accuracy and difficult control of the Curie temperature of magnetic materials, etc.

Active Publication Date: 2013-07-03
GUANGDONG FENGHUA ADVANCED TECH HLDG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the Curie temperature of the magnetic material is not easy to control, the temperature control accuracy of the corresponding device is not high.

Method used

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  • Method for preparing high-precision and high-stability temperature control manganese zinc (Mn-Zn) soft magnetic ferrite material and magnetic core product obtained thereby
  • Method for preparing high-precision and high-stability temperature control manganese zinc (Mn-Zn) soft magnetic ferrite material and magnetic core product obtained thereby
  • Method for preparing high-precision and high-stability temperature control manganese zinc (Mn-Zn) soft magnetic ferrite material and magnetic core product obtained thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The material whose central value X of the Curie temperature is 100°C, the range of the Curie temperature is 97-103°C, and the magnetic permeability of the magnetic core is 4800-7200 at 10KHz is prepared.

[0012] (1) Primary ingredients: weigh Fe 2 o 3 : 51.5mol%; MnO: 22.5mol%; ZnO: 26.0mol%;

[0013] (2) Pre-burning: Add the above-mentioned prepared materials into pure water, pass a ball mill for 2 hours, spray dry and granulate, and then pre-fire in an air pusher kiln. The pre-fire temperature is 880 ° C, and the pre-fire time is 2.5 Hour;

[0014] (3) Small-scale test: the above-mentioned pre-fired pre-sintered material is directly subjected to a small-scale test, and the obtained test ring is sintered. After sintering, its Curie temperature is 96 ° C;

[0015] (4) secondary batching: add the auxiliary component by weight percentage to the calcined material after the above-mentioned calcining: CaCO3: 0.04wt%; Nb 2 o 5 : 0.035wt%; TiO 2 : 0.055wt%; BO: 0.025wt...

Embodiment 2

[0027] The material whose central value X of the Curie temperature is 90° C., the range of the Curie temperature is 87-93° C., and the magnetic permeability of the magnetic core is 4800-7200 at 10 KHz is prepared.

[0028] (1) Primary ingredients: weigh Fe 2 o 3 : 51.5mol%; MnO: 23.0mol%; ZnO: 25.5mol%;

[0029](2) Pre-burning: Add the above-mentioned prepared materials into pure water and conduct a ball mill for 2.5 hours, then spray dry and granulate, and then pre-fire in an air pusher kiln. Hour;

[0030] (3) Small-scale test: the above-mentioned pre-fired pre-sintered material is directly subjected to a small-scale test, and the obtained test ring is sintered. After sintering, its Curie temperature is 95° C.;

[0031] (4) secondary batching: add the auxiliary component by weight percentage to the calcined material after the above-mentioned calcining: CaCO3: 0.03wt%; Nb 2 o 5 : 0.02wt%; TiO 2 : 0.05wt%; BO: 0.025wt%, and in order to lower the Curie temperature, add t...

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Abstract

The invention discloses a method for preparing a high-precision and high-stability temperature control manganese zinc (Mn-Zn) soft magnetic ferrite material and a magnetic core product obtained thereby. The method comprises the following steps of: 1, mixing 51 to 52 mole percent of Fe2O3, 22 to 24 mole percent of MnO and 24 to 27 mole percent of ZnO; 2, performing primary ball milling and spray drying granulation on the materials mixed by the step 1 and pre-sintering, wherein the pre-sintering temperature is between 870 and 960 DEG C; 3, adding three or more auxiliary materials into the pre-sintered materials obtained in the step 2; 4, performing secondary ball milling and spray drying granulation on the powder material prepared by the step 3 and performing dry pressing forming; and 5, putting the formed blank into a sintering furnace to obtain the Mn-Zn soft magnetic ferrite magnetic core. The deviation of the central value X of Curie temperature of the magnetic core product obtainedby the method is 3 DEG C, wherein X is between 0 and 200 DEG C. A temperature control element comprising the magnetic core effectively performs automatic temperature control and protection.

Description

technical field [0001] The invention relates to a method for preparing a high-precision and high-stability temperature-controlled manganese-zinc MnZn soft magnetic ferrite material and the resulting magnetic core product, in particular to a method for preparing a manganese-zinc MnZn soft magnetic ferrite material with a narrow Curie temperature range . Background technique [0002] With the development of industrial production and science and technology, the demand for high-precision measurement and control components has become increasingly prominent. As an important branch of soft magnetic ferrite materials, the birth and development of temperature-sensitive ferrite materials and their sensors meet the needs of modern technology, industry and life. In addition, in the past ten years, magnetic temperature-sensitive sensors have also been used in the automotive industry, which has opened up a new way for its development. There are a large number of electronic components in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 王京平胡春元王宏蒋胜勇叶绍均贺娟胡永清周锋赖永学
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG