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MnZn ferrite material and method of manufacturing the magnetic core

A manufacturing method, soft ferrite technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of current rise, burn-in, coil heating, etc., and achieve the effect of low power loss

Inactive Publication Date: 2008-05-21
GUANGDONG FENGHUA ADVANCED TECH HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In a circuit with a DC superimposed field, if only attention is paid to the power consumption of the material and the magnetic core, and the anti-DC superposition capability of the material and the magnetic core is ignored, the current in the coil of the magnetic device may rise sharply, causing the coil to generate a lot of heat , in severe cases, the high temperature will destroy the insulation of the wire, resulting in burn-in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to iron oxide Fe 2 o 3 : manganese oxide MnO: zinc oxide ZnO=52.2: 37.6: 10.2mol% of the formula for a batching, wherein manganese oxide Fe 2 o 3 Purity ≥ 99.3wt%, manganese oxide MnO purity ≥ 98.8wt%, zinc oxide ZnO purity ≥ 99.7wt%, pour the three raw materials into a mixing tank, add a conventional amount of dispersant and deionized water, and fully stir and mix , and ball milled for 3 hours; conventional spray drying was carried out, and then pre-calcined, the pre-fired temperature was 800°C, and the pre-fired time was 80 minutes, and the calcined material was obtained; the calcined material was put into a ball mill for secondary batching, and the following 500ppm by weight of silicon dioxide SiO 2 and 1000 ppm by weight of bismuth trioxide Bi 2 o 3 Add conventional amount of deionized water, dispersant and defoamer, and ball mill for 3 hours to obtain black slurry; pour the slurry into the mixing tank, and then carry out conventional spray granulatio...

Embodiment 2

[0029] According to iron oxide Fe 2 o 3 : manganese oxide MnO: zinc oxide ZnO=52: 37.8: 9.88mol% of the formula for a batching, wherein iron oxide Fe 2 o 3Purity ≥ 99.3wt%, manganese oxide MnO purity ≥ 98.8wt%, zinc oxide ZnO purity ≥ 99.7wt%, pour the three raw materials into a mixing tank, add a conventional amount of dispersant and deionized water, and fully stir and mix uniform, ball milling for 4 hours; conventional spray drying, and pre-burning, the pre-burning temperature was 840 ° C, and the pre-burning time was 70 minutes, and the calcined material was obtained; the calcined material was put into a ball mill for secondary batching, and Add 400ppm by weight of the first subcomponent tantalum pentoxide Ta 2 o 5 and 1500ppm by weight of the second subcomponent niobium pentoxide Nb 2 o 5 , add a conventional amount of deionized water, dispersant and defoamer, and ball mill for 4 hours to obtain a black slurry; pump the slurry into the mixing tank, and then spray gra...

Embodiment 3

[0031] According to iron oxide Fe 2 o 3 : manganese oxide MnO: zinc oxide ZnO=51.8: 37.4: 10.8mol% of the formula for a batching, wherein iron oxide Fe 2 o 3 Purity ≥ 99.3wt%, manganese oxide MnO purity ≥ 98.8wt%, zinc oxide ZnO purity ≥ 99.7wt%, pour the three raw materials into a mixing tank, add a conventional amount of dispersant and deionized water, and fully stir and mix uniform, ball milling for 5 hours; conventional spray drying, and then pre-burning, the pre-burning temperature is 900 ° C, and the pre-burning time is 50 minutes, and the calcined material is obtained; the calcined material is put into the ball mill for secondary batching, and Add 600ppm by weight of the first subcomponent silicon dioxide SiO 2 , tantalum pentoxide Ta 2 o 5 Mixture and 2000ppm by weight of the second subcomponent bismuth trioxide Bi 2 o 3 , Tungsten trioxide WO 3 Add a conventional amount of deionized water, dispersant and defoamer to the mixture, and ball mill for 3 hours to ob...

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Abstract

The invention discloses a Mn-Zn ferrite magnetic material, a magnetic core and a related manufacturing method. The primary composition of Mn-Zn soft magnetic ferrite materials: 49.5 to 53.9 mol percentages of iron oxide Fe2O3, 34.6 to 39.8 mol percentages of manganese oxide MnO, and 8.5 to 13.8 percentages of zinc oxide ZnO. Furthermore, a first assistant component with a weight of 100 to 600ppm, as well as a second assistant component with a weight of 50 to 3000ppm are added into the primary composition; wherein the first assistant component refers to one or more materials as silicon dioxide SiO2 or tantalum oxide Ta2O5; the second assistant component refers to one or more materials as bismuth trioxide Bi2O3, niobium pentoxide Nb2O5 or \ tungsten trioxide WO3. A magnetic billet can be prepared according the formula, followed by high temperature sintering under 1280 to 1360 DEG C in a nitrogen-protected kiln. The manufactured magnetic core has the advantages of high anti-DC-superposing performance and lower power consumption.

Description

technical field [0001] The invention relates to a ferrite material, in particular to a composition of manganese zinc MnZn soft magnetic ferrite material and a manufacturing method of the obtained magnetic core. Background technique [0002] At present, my country is the world's largest producer of soft magnetic materials. Most of the well-known foreign manufacturers of magnetic devices have moved their production bases to mainland China even if their testing and design departments remain in their home countries; domestic capital has also invested in the fast-growing magnetic device production industry, either OEM or independent operation, which has greatly increased the demand for upstream soft magnetic materials. [0003] With the development of electronic complete machines, the requirements for anti-DC superposition ability of magnetic materials have been put forward in many occasions. For various reasons, the current in the electronic circuit is more or less mixed with ...

Claims

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Application Information

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IPC IPC(8): H01F1/34C04B35/26C04B35/622H01F41/02
Inventor 王京平胡春元王宏蒋胜勇胡卫斌韦卫佳周锋赖永学黄华清淦海平刘关生吴勇华吴辉跃
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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