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Manganese zinc soft magnetic ferrite and production method for its magnetic core

A manganese-zinc soft magnet and oxygen body technology, which is applied in the fields of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of no μi temperature curve, large difference in μi, and failure to meet the high-quality requirements of energy-saving lighting, etc. , to achieve the effect of improving ball milling quality, reducing shrinkage, and good material activity

Inactive Publication Date: 2009-04-08
GUANGDONG FENGHUA ADVANCED TECH HLDG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neither of these two types of materials has a stable μi temperature curve, and the μi varies greatly at different temperatures, which cannot meet the high-quality requirements of μi temperature stability in the field of energy-saving lighting

Method used

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  • Manganese zinc soft magnetic ferrite and production method for its magnetic core
  • Manganese zinc soft magnetic ferrite and production method for its magnetic core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Accurately weigh 53.15% molFe 2 o 3(purity ≥ 99.3%), 30.2% molMnO, 16.65% mol ZnO (purity ≥ 99.7%) three main raw materials, after a batching and ball milling, spray granulation, pre-calcination, secondary batching and ball milling, pressed into a green body, For the magnetic core obtained in the green body sintering step, 0.2% to 1.5% by weight of a dispersant is added to the primary ingredients. The dispersant is a mixture of water citric acid, acrylic acid, and ammonia water, and its weight ratio is 0.31 to 0.45:0.45 ~0.58: 0.11~0.24 mixing, also add the dispersant that weight percentage is 0.2wt%~1.5wt% in the described primary batching, described dispersant is water citric acid, acrylic acid, ammonia water mixture, its weight ratio 0.31-0.45: 0.45-0.58: 0.11-0.24; a binder is also added to the primary batching, the binder is polyvinyl alcohol, and the weight percentage is 0.6wt%-1.5wt%. Spray granulation to form granules of 80-200 μm, water content of 0.25-0.45%,...

Embodiment 2

[0017] Accurately weigh 52.8% molFe 2 o 3 (purity ≥ 99.3%), 31.9% molMnO, 15.3% mol ZnO (purity ≥ 99.7%) three main raw materials, after a batching and ball milling, spray granulation, pre-calcination, secondary batching and ball milling, pressed into a green body, For the magnetic core obtained in the green body sintering step, 0.2% to 1.5% by weight of a dispersant is added to the primary ingredients. The dispersant is a mixture of water citric acid, acrylic acid, and ammonia water, and its weight ratio is 0.31 to 0.45:0.45 ~0.58: 0.11~0.24 mixing, also add the dispersant that weight percentage is 0.2wt%~1.5wt% in the described primary batching, described dispersant is water citric acid, acrylic acid, ammonia water mixture, its weight ratio 0.31-0.45: 0.45-0.58: 0.11-0.24; a binder is also added to the primary batching, the binder is polyvinyl alcohol, and the weight percentage is 0.6wt%-1.5wt%. Spray granulation to form granules of 80-200 μm, water content of 0.25-0.45%, ...

Embodiment 3

[0021] Accurately weigh 53.5% molFe 2 o 3 (purity ≥ 99.3%), 27.7% molMnO, 18.8% mol ZnO (purity ≥ 99.7%) three main raw materials, after a batching and ball milling, spray granulation, pre-calcination, secondary batching and ball milling, pressed into a green body, For the magnetic core obtained in the green body sintering step, 0.2% to 1.5% by weight of a dispersant is added to the primary ingredients. The dispersant is a mixture of water citric acid, acrylic acid, and ammonia water, and its weight ratio is 0.31 to 0.45:0.45 ~0.58: 0.11~0.24 mixing, also add the dispersant that weight percentage is 0.2wt%~1.5wt% in the described primary batching, described dispersant is water citric acid, acrylic acid, ammonia water mixture, its weight ratio 0.31-0.45: 0.45-0.58: 0.11-0.24; a binder is also added to the primary batching, the binder is polyvinyl alcohol, and the weight percentage is 0.6wt%-1.5wt%. Spray granulation to form granules of 80-200 μm, water content of 0.25-0.45%, ...

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Abstract

The invention provides an Mn-Zn soft magnetic ferrite material and a preparation method used for the magnetic core; according to molar ratio, the Mn-Zn soft magnetic ferrite material comprises 52-54mol% of Fe2O3, 27-33mol% of Mn3O4, and 15-19mol% of ZnO; the Mn-Zn soft magnetic ferrite material also comprises three groups of auxiliary oxides such as A, B and C; according to the weight percentage, the auxiliary oxides of group A comprise one or more 0.01-0.30wt% of mixtures out of CaO, SiO2, V2O5 and Cr2O5, the auxiliary oxides of group B consist of one or more 0.05-0.45wt% of mixtures out of Co2O3, TiO2, Bi2O3, WO3 and the auxiliary oxides of group B comprise one or two 0.01-0.15wt% of mixtures out of Nb2O5 and NiO. The magnetic core gained by the method is applied to the fields of energy-saving illumination and high-frequency communication and has consistent inductance value, low loss and high usage frequency under different working temperatures.

Description

technical field [0001] The present invention relates to a ferrite material and a preparation method of the obtained magnetic core, in particular to a manganese-zinc soft magnetic ferrite material which is applied in the field of energy-saving lighting and high-frequency communication and has wide temperature stability and the preparation method of the obtained magnetic core . Background technique [0002] At present, manganese-zinc soft magnetic ferrite materials are mainly low power consumption and high conductivity. The second peak of the temperature curve of low power consumption materials is generally around 100°C, and the μi temperature curve is a positive temperature coefficient at 0-100°C. The temperature curve of μi at 180°C is a positive temperature coefficient, and the point from 180°C to the Curie temperature (generally 230°C) is a positive temperature coefficient. This kind of material is used in the field of lighting, switching power supply, and making electron...

Claims

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Application Information

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IPC IPC(8): H01F1/34H01F41/02B22F3/12B22F9/04
Inventor 王京平段庆娃胡永清刘关生莫伟立胥云峰黄健泉周芸肖军陈建波黄国前邬善亿曹香莲
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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