Wide-temperature high-permeability Mn-Zn soft magnetic ferrite material and magnetic core prepared therefrom as well as preparation method thereof

A technology of magnetic permeability of manganese zinc and soft ferrite, applied in the direction of inorganic material magnetism, magnetic core/yoke, electrical components, etc., can solve problems such as dependence on imports

Inactive Publication Date: 2010-12-15
GUANGDONG FENGHUA ADVANCED TECH HLDG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no relevant material in China, and this ki

Method used

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  • Wide-temperature high-permeability Mn-Zn soft magnetic ferrite material and magnetic core prepared therefrom as well as preparation method thereof
  • Wide-temperature high-permeability Mn-Zn soft magnetic ferrite material and magnetic core prepared therefrom as well as preparation method thereof
  • Wide-temperature high-permeability Mn-Zn soft magnetic ferrite material and magnetic core prepared therefrom as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Press Fe 2 o 3 : MnO: ZnO = 50.5: 26.5: 23.0mol% of the formula for a batching, wherein Fe 2 o 3 Adopt Japanese Kawasaki iron red, purity ≥ 99.5wt%, MnO converted to Mn 3 o 4 , using high-purity Mn from Hunan Jinrui 3 o 4 , Mn purity ≥ 70.8wt%, ZnO adopts ZnO from Haimen, Zhejiang, with purity ≥ 99.7wt%. Pour the three raw materials into a mixing tank, add a dispersant and deionized water, fully stir and mix, and perform a ball mill for 4 to 6 hours. Spray drying and pre-calcination are carried out. The pre-calcination temperature is 860-960° C. and the pre-calcination time is 60-90 minutes to obtain a calcined material.

[0024] The calcined material is used for secondary batching, put into a ball mill for secondary ball milling, and three groups of auxiliary materials A, B and C are added, and the auxiliary material of group A is CaCO 3 , CuO, Nb 2 o 5 The mixture, its total content is 500ppm. The composition of the B group auxiliary material is MoO 3 、BiO...

Embodiment 2

[0030] Press Fe 2 o 3 : MnO: ZnO = 51.5: 25.5: 23.0mol% of the formula for a batching, where Fe 2 o 3 Adopt Japanese Kawasaki iron red, purity ≥ 99.5wt%, MnO converted to Mn 3 o 4 , using high-purity Mn from Hunan Jinrui 3 o 4 , Mn purity ≥ 70.8wt%, ZnO adopts ZnO from Haimen, Zhejiang, with purity ≥ 99.7wt%. Pour the three raw materials into a mixing tank, add a dispersant and deionized water, fully stir and mix, and perform a ball mill for 4 to 6 hours. Spray drying and pre-calcination are carried out. The pre-calcination temperature is 860-960° C. and the pre-calcination time is 60-90 minutes to obtain a calcined material.

[0031] The calcined material is used for secondary batching, put into a ball mill for secondary ball milling, and three groups of auxiliary materials A, B, and C are added. The auxiliary material of group A is CaCO with a weight percentage of 300ppm 3 and CuO, the composition of the B group auxiliary material is MoO with a weight percentage of 7...

Embodiment 3

[0033] Press Fe 2 o 3 : MnO: ZnO = 52.5: 24.5: 23.0mol% of the formula for a batching, where Fe 2 o 3 Adopt Japanese Kawasaki iron red, purity ≥ 99.5wt%, MnO converted to Mn 3 o 4 , using high-purity Mn from Hunan Jinrui 3 o 4 , Mn purity ≥ 70.8wt%, ZnO adopts ZnO from Haimen, Zhejiang, with purity ≥ 99.7wt%. Pour the three raw materials into a mixing tank, add a dispersant and deionized water, fully stir and mix, and perform a ball mill for 4 to 6 hours. Spray drying and pre-calcination are carried out. The pre-calcination temperature is 860-960° C. and the pre-calcination time is 60-90 minutes to obtain a calcined material.

[0034] The pre-fired material is used for secondary batching, put into a ball mill for secondary ball milling, and three groups of auxiliary materials A, B, and C are added. The auxiliary material of group A is CaCO with a weight percentage of 100ppm 3 , the composition of the B group auxiliary material is MoO with a weight percentage of 100ppm ...

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Abstract

The invention discloses a wide-temperature high-permeability Mn-Zn soft magnetic ferrite material, of which a main formula comprises 50.5-52.5mol% of Fe2O3, 24.5-26.5mol% of MnO, and 21-25mol% of ZnO and simultaneously comprises the following auxiliary materials of a first auxiliary material group including one or a mixture of more than two of CaCO3, CuO, and Nb2O5 with the content of 100-500ppm, and a second auxiliary material group including one or a mixture of more than two of MoO3, BiO3 and SiO2 with the content of 100-2000ppm. At least one component in the first auxiliary material group and the second auxiliary material group forms a liquid state under high temperature, thereby reducing the sintering temperature, greatly accelerating the sintering solid-phase reaction, increasing the magnetic core density and improving the initial permeability of the material. A soft magnetic core prepared from the material has favorable temperature characteristics and very high permeability from low temperature to high temperature, and can be used for but not limited to a series of fields of external facilities of modern communication equipment, common communication equipment, and the like.

Description

technical field [0001] The invention relates to the technical field of a ferrite material and a magnetic core made from the material. Background technique [0002] When the magnetic permeability of the material is high, the required inductance can be obtained with fewer coil turns, thereby effectively reducing the DC resistance of the coil and the loss caused by it; secondly, the use of materials with high magnetic permeability can significantly reduce the inductance. The small size of the transformer is conducive to the miniaturization and weight reduction of devices and systems. These characteristics conform to the development trend of electronic products, and its output has accounted for more than 25% of the total output of all soft ferrites. With the rapid development of electronic information industries such as communications, computers, and networks, its market demand has grown rapidly at an average annual rate of more than 20%. Therefore, relevant enterprises at hom...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/34H01F3/08
Inventor 王京平黄健泉胡春元蒋胜勇胥云峰贺娟胡永清刘关生周芸肖军莫伟立陈建波邬善亿
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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