NiZn soft magnetic ferrite material with high magnetic conductivity and high Curie temperature and its preparing method

A technology of soft magnetic ferrite and high magnetic permeability, applied in the direction of magnetic properties of inorganic materials, can solve the problems of low practical value, achieve high magnetic permeability, increase Curie temperature, and improve the effect of microstructure

Inactive Publication Date: 2007-03-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

For example, although the domestic Xinxin Electronics Company claims that it has developed a NiZn ferrite material with a magnetic permeability as high as 3000, which fills the domestic gap, it is mainly realized by increasing the content of ZnO in the formula. The temperature inside is very low, only about 70°C, so the practical value is not high

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  • NiZn soft magnetic ferrite material with high magnetic conductivity and high Curie temperature and its preparing method

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Embodiment Construction

[0019] A NiZn soft magnetic ferrite material with high magnetic permeability and high Curie temperature is made of metal oxides by oxide wet process, wherein the metal oxide raw materials include Fe 2 o 3 , NiO, ZnO and CuO, characterized in that the oxide raw material also includes WO as a dopant 3 , the content of each component: Fe 2 o 3 50.5mol%, NiO 14mol%, ZnO 32mol%, CuO 3.5mol%, WO 3 At 0.2 mol%.

[0020] Taking the preparation of NiZn ferrite with an initial magnetic permeability of 3000 as an example, the preparation method is as follows:

[0021] Step 1. Press Fe 2 o 3 : NiO: ZnO: CuO=50.5mol%: 14mol%: 32mol%: 3.5mol% formula ratio, weigh Fe 2 o 3 , NiO, ZnO and CuO oxide raw materials, mixed evenly by a ball mill, and then dried in an oven at about 100 °C.

[0022] Step 2: Place the dried material obtained in Step 1 into a sintering bowl for compaction and punching holes, raise the temperature at 3°C / min to the pre-burning temperature point of 1050°C, keep...

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Abstract

This invention relates to regular high magnetic rate NiZn iron oxidation formula and provides one NIZn iron oxidation materials and its process method, which adopts metal oxidation as materials by use of oxidation wet method, which comprises Fe2O3,NiO,ZnO,CuO and WO3 with each content as: Fe2O3 for 50.5-51mol %; NiO for 13.5-14mol%; ZnO for 31.5-32mol%; CuO for 3.5-4.5mol%; WO3 for 0.1-0.3mol%.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and relates to a NiZn soft magnetic ferrite material with high magnetic permeability and high Curie temperature for radio frequency broadband devices and a preparation method thereof. Background technique [0002] The ferrite broadband device made of NiZn soft ferrite material is a new type of device developed internationally since the 1970s, and its use frequency band can be made very wide. In recent years, with the development of radio-frequency ferrite broadband devices, the characteristics of materials above the cut-off frequency fr of the magnetic spectrum curve have also been widely used. In order to meet the requirements of the broadband characteristics of the device, it is necessary to use a high permeability NiZn ferrite material with a relaxed magnetic spectrum. The main function of broadband devices made of this material is to realize the energy transmission and impedance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34
Inventor 苏桦张怀武唐晓莉荆玉兰钟智勇刘颖力
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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