MnZn ferrite material and method for preparing magnet core

A technology of ferrite material and iron oxide, which is applied in the direction of magnetism of inorganic materials, can solve problems such as poor power conversion efficiency, achieve low power loss characteristics, and improve technical grades

Inactive Publication Date: 2009-04-15
GUANGDONG FENGHUA ADVANCED TECH HLDG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it can also be inferred that the "secondary power...

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  • MnZn ferrite material and method for preparing magnet core

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Embodiment 1

[0015] A kind of MnZn ferrite material, its method for preparing magnetic core is as follows:

[0016] (1) by Fe 2 o 3 : MnO: ZnO = 53.5: 35.6: 10.9mol% of the formula for a batching, where Fe 2 o 3 Using German ThyssenKrupp iron red (purity ≥ 99.3wt%), MnO is converted into Mn 3 o 4 , using high-purity Mn from Hunan Jinrui 3 o 4 (purity ≥ 98.8wt%), ZnO adopts ZnO (indirect method, purity ≥ 99.7wt%) in Haimen, Zhejiang; three kinds of raw materials are poured into the mixing tank, and dispersant and deionized water are added, and the dispersant is water The mixture of citric acid, acrylic acid and ammonia water has a weight ratio of 0.31-0.45:0.45-0.58:0.11-0.24; polyvinyl alcohol is added in a weight percentage of 0.6wt%-1.5wt%. Thoroughly stir and mix, and carry out ball milling for 2 hours;

[0017](2) Perform conventional spray drying on the above slurry, and then pre-calcine, the pre-fire temperature is 800°C, and the pre-fire time is 180 minutes, to obtain the pr...

Embodiment 2

[0023] A kind of MnZn ferrite material, its method for preparing magnetic core is as follows:

[0024] (1) by Fe 2 o 3 : MnO: ZnO = 51.8: 37.8: 10.4mol% of the formula for a batching, where Fe 2 o 3 Using German ThyssenKrupp iron red (purity ≥ 99.3wt%), MnO is converted into Mn 3 o 4 , using high-purity Mn from Hunan Jinrui 3 o 4 (purity ≥ 98.8wt%), ZnO adopts ZnO (indirect method, purity ≥ 99.7wt%) in Haimen, Zhejiang; three kinds of raw materials are poured into the mixing tank, and dispersant and deionized water are added, and the dispersant is water The mixture of citric acid, acrylic acid and ammonia water has a weight ratio of 0.31-0.45:0.45-0.58:0.11-0.24; polyvinyl alcohol is added in a weight percentage of 0.6wt%-1.5wt%. Thoroughly stir and mix, and carry out ball milling for 6 hours;

[0025] (2) Perform conventional spray drying on the above slurry, and then pre-calcine, the pre-fire temperature is 940°C, and the pre-fire time is 90 minutes, to obtain the pr...

Embodiment 3

[0032] A kind of MnZn ferrite material, its method for preparing magnetic core is as follows:

[0033] (1) by Fe 2 o 3 : MnO: ZnO = 52.5: 36.2: 11.3mol% of the formula for a batching, where Fe 2 o 3 Using German ThyssenKrupp iron red (purity ≥ 99.3wt%), MnO is converted into Mn 3 o 4 , using high-purity Mn from Hunan Jinrui 3 o 4 (purity ≥ 98.8wt%), ZnO adopts ZnO (indirect method, purity ≥ 99.7wt%) in Haimen, Zhejiang; three kinds of raw materials are poured into the mixing tank, and dispersant and deionized water are added, and the dispersant is water The mixture of citric acid, acrylic acid and ammonia water has a weight ratio of 0.31-0.45:0.45-0.58:0.11-0.24; polyvinyl alcohol is added in a weight percentage of 0.6wt%-1.5wt%. Thoroughly stir and mix, and carry out ball milling for 5 hours;

[0034] (2) Perform conventional spray drying on the above slurry, and then pre-calcine, the pre-fire temperature is 940°C, and the pre-fire time is 120 minutes, to obtain the p...

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Abstract

The invention relates to a MnZn ferrite material and a method thereof for manufacturing a magnetic core out of the material. According to mol rate, the ingredients of principal crystalline phase include 48.5-53.8 percent of Fe2O3, 35.6-40.8 percent of MnO and the rest of ZnO. By weight, the principal crystalline phase needs to be further added with 100-600ppm of a first accessory constituent, 50-3000ppm of a second accessory constituent and 100-6000ppm of a third accessory constituent. The first accessory constituent means one or the two of SiO2 and Ta2O5, the second accessory constituent means one or more of CaCO3, Bi2O3, Nb2O5 and WO3 and the third accessory constituent means one or more of TiO2, V2O5 and Co3O4. Within the wide temperature range from 25 to 100 DEG C, the MnZn ferrite material has surely low power loss of 100kHz and 200mT and the power loss of Pcv of not more than 380KW/m<3>. The magnetic core prepared by adopting the materials of the invention greatly reduces the power loss of 'secondary power supply' in the state of standby, idle load or light load, thus achieving the aim of saving energy.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic ferrite materials, and in particular relates to an energy-saving, wide-temperature and low-loss MnZn ferrite material and a method for preparing a magnetic core. Background technique [0002] After more than 20 years of development in China's soft magnetic industry, the technical level has made great progress. At present, the high-performance soft magnetic oxygen that can be mass-produced and matched with home appliances, computers, communications, green lighting, automotive electronics, military industry and other fields body core. In the past two years, most domestic manufacturers have started to produce PC40 products, and the technical level of some small factories is still between PC30 and PC40. If the energy-saving and wide-temperature low-loss soft ferrite material core is developed and used, the core of this material has very low self-power loss from room temperature to high temperat...

Claims

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Application Information

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IPC IPC(8): H01F1/37C04B35/26C04B35/64
Inventor 王京平胡春元王宏蒋胜勇胡卫斌叶绍均姚木有贺娟胡永清赖永学黄华清周锋吴勇华吴辉跃练炜科卢佛山林庆培李宏秀
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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