High DC stacked MnZn high magnetic conductivity ferrite and method for preparing the same

A technology with high DC superposition and high magnetic permeability, which is applied in the direction of inorganic material magnetism, can solve the problems that cannot meet the high inductance DC superposition performance, and achieve the effect of improving DC superposition performance, reducing Br value, and high inductance

Inactive Publication Date: 2008-05-21
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Problems solved by technology

With the rapid development of digital networks, products are required to be used in harsher environments, especially with high DC superimposed inductance values ​​...

Method used

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Embodiment 1

[0036] (1) Ingredients: the main component is Fe in molar weight percentage 2 o 3 : 52% to 53%; MnO: 27% to 29%; ZnO: 19% to 20% for weighing, and after weighing, add deionized water to the mixer for mixing and crushing to prepare a slurry. The particle size of the material is controlled at 0.6-1.5 μm; (2) spray granulation: the mixed slurry is sprayed and granulated, and the water in the slurry is removed to prepare a granular material; (3) pre-calcination: the above-mentioned mixed Good granules are calcined, the calcining temperature is 750°C-980°C, and the calcining time is 1-9 hours; (4) Pulverization: add two or more of the following auxiliary components by weight percentage to the above calcined material Two or more: CaCO 3 : 0.005~0.05wt%, NiO: 0.01~0.2wt%, V 2 o 5 : 0.005~0.05wt%, Nb 2 o 5 : 0.005~0.05wt%, Ta 2 o 5 : 0.005~0.05wt%, TiO 2 : 0.01~0.2wt%, Co 2 o 3 : 0.05~0.4wt%, then put the powder into a pulverizer after adding deionized water to pulverize, a...

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PUM

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Abstract

The invention relates to a Mn-Zn ferrite and the preparation method, in particular to a high direct current superimposed property Mn-Zn high magnetic permeability ferrite and the preparation method. The main technical proposal of the invention is: enough Co2O3 and Nb2O5 are added; magnetic core Br value is reduced; -40 to 85 Degree C temperature characteristics is improved; the direct current superimposed property is raised; the ferrite comprises components with the following molar percentage: Fe2O3: 52% to 53%, Mn2O3: 27% to 29%, ZnO: 19% to 20%. The invention has an advantage of providing a high direct current superimposed property Mn-Zn high magnetic permeability ferrite with reasonable design and capability of satisfying high inductance and excellent direct current superimposed property in a rather wide temperature range and the preparation method.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite and a preparation method thereof, in particular to a MnZn high-permeability ferrite with high DC superimposition characteristics and a preparation method thereof. Background technique [0002] With the rapid development of pulse transformers in the fields of integrated services digital network (ISDN), local area network (LAN), wide area network (WAN), background lighting, etc., the demand for ferrite materials suitable for pulse transformers in LAN network systems is also increasing. Increasingly, the application of LAN network systems in cutting-edge fields such as industrial fields requires a temperature range of -40°C to 85°C. This kind of ferrite is mainly used for network isolation transformers and network filters of network communication equipment, including: 10 / M, 100 / M, 1000 / M Ethernet filters, transformers, high-speed LAN with wide temperature range made of DMR73 material The 100 Base-T pulse ...

Claims

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Application Information

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IPC IPC(8): H01F1/11C04B35/26C04B35/64
Inventor 周煜刘志坚
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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