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Ferrite magnetic core for network communication and method for producing the same

A manganese-zinc ferrite and magnetic core technology, which is applied in the field of ferrite magnetic core and its preparation, can solve the problem of low superposition performance

Inactive Publication Date: 2009-05-13
GUANGDONG FENGHUA ADVANCED TECH HLDG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material is used in power loss devices, and its initial permeability μi, operating frequency, saturation magnetic flux density Bs, and superposition performance are all low.

Method used

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  • Ferrite magnetic core for network communication and method for producing the same
  • Ferrite magnetic core for network communication and method for producing the same
  • Ferrite magnetic core for network communication and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Accurately weigh Fe 2 o 3 (purity≥99.3%): 53.5mol%; MnO (containing manganese≥71%): 33.2mol%; ZnO (purity≥99.7%): 8.9mol%, NiO (purity≥98.5%): 1.5mol%, CuO ( Purity ≥ 99%): 2.9mol%, use a ball mill to mix the raw materials evenly, the average particle size of the red slurry is required to reach 0.9-1.5μm, pre-calcine after spray drying, and keep the temperature at 950±50°C for 2-3 hours . During secondary ball milling, auxiliary components, Co 2 o 3 0.065wt%, WO 3 0.02wt%, SnO 2 0.08wt%, Bi 2 o 3 0.03wt%, CaO 0.05wt%, Nb 2 o 5 0.03wt%, V 2 o 5 0.02wt%, and an appropriate amount of pure water and dispersant for ball milling to obtain a black slurry with an average particle size of 1.0-1.6μm, adding 0.8-1.8wt% of PVA and 0.1-0.2wt% of defoamer during spray granulation to obtain Granular material with a particle size distribution of 75 μm to 250 μm. Compress T25×15×10(mm), EP09 magnetic cores with a rotary press, and the green density is 3.0±0.25g / cm 3 ...

Embodiment 2

[0018] Accurately weigh Fe 2 o 3 (purity≥99.3%): 51.2mol%; MnO (containing manganese≥71%): 37.8mol%; ZnO (purity≥99.7%): 9.35%; NiO (purity≥98.5%): 0.01~5mol%, CuO (Purity ≥ 99%): 0.01~3mol% Use a ball mill to mix the raw materials evenly. The average particle size of the red slurry is required to reach 0.9~1.5μm. Hours, control the formation of spinel phase to 20% to 35%. During secondary ball milling, auxiliary components, Co 2 o 3 0.085wt%, WO 3 0.03wt%, SnO 2 0.1wt%, Bi 2 o 3 0.02wt%, CaO 0.03wt%, Nb 2 o 5 0.03wt%, V 2 o 5 0.025wt%, and an appropriate amount of pure water and dispersant for ball milling to obtain a black slurry with an average particle size of 1.0-1.6μm, adding 0.8-1.8wt% of PVA and 0.1-0.2wt% of defoamer during spray granulation, and making Granular materials with a particle size distribution of 75 μm to 250 μm are obtained. Press and form T25×15×10(mm), EP07 magnetic cores with a rotary press, with a green density of 3.0±0.25g / cm3; sinte...

Embodiment 3

[0023] Accurately weigh Fe 2 o 3 (purity≥99.3%): 57.2mol%; MnO (containing manganese≥71%): 25.8mol%; ZnO (purity≥99.7%): 9.35%; NiO (purity≥98.5%): 0.01~5mol%, CuO (Purity ≥ 99%): 0.01~3mol% Use a ball mill to mix the raw materials evenly. The average particle size of the red slurry is required to reach 0.9~1.5μm. Hours, control the formation of spinel phase to 20% to 35%. During secondary ball milling, auxiliary components, Co 2 o 3 0.085wt%, WO 3 0.03wt%, SnO 2 0.1wt%, Bi 2 o 3 0.02wt%, CaO 0.03wt%, Nb 2 o 5 0.03wt%, V 2 o 5 0.025wt%, and an appropriate amount of pure water and dispersant for ball milling to obtain a black slurry with an average particle size of 1.0-1.6μm, adding 0.8-1.8wt% of PVA and 0.1-0.2wt% of defoamer during spray granulation, and making Granular materials with a particle size distribution of 75 μm to 250 μm are obtained. Press and form T25×15×10(mm), EP07 magnetic cores with a rotary press, with a green density of 3.0±0.25g / cm3; sinte...

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Abstract

The invention relates to a manganese-zinc ferrite magnetic core for network communication and a method for preparing the same. The magnetic core comprises the following compositions in terms of mol ratio: 51 to 58 mol percent of Fe2O3, 23 to 38 mol percent of MnO, 6 to 14 mol percent of ZnO, 0.01 to 5 mol percent of NiO, and 0.01 to 3 mol percent of CuO. The method for preparing the magnetic core comprises the following steps sequentially: first time of material blending and ball milling, presintering, second time of material blending and ball milling, spraying granulation to obtain granule materials, pressing the materials into biscuits, and biscuit sintering. The sintering is performed in push board kiln in an N2 protective atmosphere, experiences different sintering temperature stages, and finally keeps the temperature for 3 to 8 hours in the N2 atmosphere until the temperature is cooled to room temperature. The magnetic core has the performances of high MU i, high superposition, broad band and low loss. The magnetic core is widely used in the fields of network communication and electronic power, in particular in an ADSL technical separator.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic ferrite materials, and in particular relates to a ferrite core used in the fields of network communication and electronic power and a preparation method thereof. Background technique [0002] With the continuous expansion of the application field of soft ferrite, its technical performance is increasingly innovative and improved. In the fields of network communication, electronic power, etc., in order to meet the development of electronic equipment in the direction of lightness, miniaturization, and integration, and to ensure the stable, reliable, and efficient operation of the equipment system, newer and higher performance requirements are put forward for ferrite materials. . In the field of network communication applications, soft ferrite materials used in ADSL technology separators are required to have better DC superposition characteristics, lower specific loss coefficient tanδ / μi and wi...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622
Inventor 王京平胡春元蒋胜勇段庆娃胥云峰黄健泉胡永清刘关生周芸贺娟
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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