Mn-zn high-conductivity ferrite material with wide temperature and high DC superposition characteristics and preparation method thereof

A ferrite material, high DC technology, applied in the direction of inorganic material magnetism, etc., can solve the problem of not mentioned, achieve the effect of small leakage inductance, lower Br value, and stable process

Active Publication Date: 2015-09-16
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be seen that the application range of similar materials described in the above article is limited to -40°C to 85°C, and there is no mention of the range of -40°C to 120°C mentioned in the present invention.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Ingredients: Dosing according to the composition of the main component and auxiliary components of the ferrite material in terms of oxides, where: the main component is Fe 2 o 3 52 mol%, ZnO 16.5 mol%, MnO 31.5 mol%; the auxiliary components based on the total weight of the main components are: CaO 600ppm, Nb 2 o 5 200ppm, ZrO 2 300ppm 、Co 2 o 3 2000ppm, MoO 3 300ppm, TiO 2300ppm.

[0039] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0040] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0041] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 950°C for 2.5 hours.

[0042] 5. Sanding: use a circulating sand mill for sanding, and the sanding time is 2 hours, wherein, material: ball: water = 1:1:0.60; the average particle size of the powder after sanding is 1.0-1.2 μm.

[0043] 6. Granula...

Embodiment 2

[0047] 1. Ingredients: Dosing according to the composition of the main component and auxiliary components of the ferrite material in terms of oxides, where: the main component is Fe 2 o 3 52.5 mol%, ZnO 15.5 mol%, MnO 32 mol%; the auxiliary components based on the total weight of the main components are: CaO 600ppm, Nb 2 o 5 200ppm, ZrO 2 400ppm 、Co 2 o 3 2500ppm, MoO 3 300ppm, TiO 2 200ppm.

[0048] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.5 hours;

[0049] 3. Vibration grinding: use a vibrating mill to vibrate and grind, and the vibration grinding time is 1 hour;

[0050] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 1100°C for 1 hour.

[0051] 5. Sanding: Use a circulating sand mill for sanding, and the sanding time is 4 hours; the material: ball: water = 0.8: 0.8: 0.55; the average particle size of the powder after sanding is 0.8-1.0 μm.

[0052] 6. Granulation molding: use a...

Embodiment 3

[0056] 1. Ingredients: Dosing according to the composition of the main component and auxiliary components of the ferrite material in terms of oxides, where: the main component is Fe 2 o 3 is 52.3mol%, ZnO is 16.5mol%, MnO is 31.2mol%; the auxiliary components based on the total weight of the main components are: CaO 600ppm, Nb 2 o 5 200ppm, ZrO 2 400ppm 、Co 2 o 3 1500ppm, MoO 3 300ppm, TiO 2 200ppm.

[0057] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 1 hour;

[0058] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.4 hours;

[0059] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 900°C for 5 hours.

[0060] 5. Sand milling: use a circulating sand mill for sand milling, and the sand milling time is 3 hours; the material: ball: water = 1.2: 1.2: 0.65; the average particle size of the powder after sand milling is 1.2 ~ 1....

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Abstract

The invention relates to a Mn-Zn ferrite material, and provides a Mn-Zn high-permeability ferrite material with a high direct-current superposition property at wide temperature. The ferrite material is composed of principal compositions and auxiliary compositions, and the principal phase of the ferrite material is of a spinel structure, wherein the principal compositions include the following compositions in terms of oxides: 51.5-53.5 mol% of Fe2O3, 15-18 mol% of ZnO and 30.5-35 mol% of MnO; and the auxiliary compositions include one or mixtures of the following compositions by the total weight of the principal compositions: 400-800 ppm of CaO, 100-600 ppm of Nb2O5, 100-800 ppm of ZrO2, 1000-4000 ppm of Co2O3, 100-500 ppm of MoO3, and 100-800 ppm of TiO2. The invention also provides a method for preparing the material. The ferrite material provided by the invention has a good direct current superposition property in a temperature range of minus 40-plus 120 DEG C, and can meet more strict requirements for the environment on the current market.

Description

technical field [0001] The invention belongs to the field of soft magnetic high conductivity, and in particular relates to a Mn-Zn high conductivity ferrite material with wide temperature and high DC superposition characteristics and a preparation method thereof. Background technique [0002] With the rapid development of pulse transformers in integrated services digital network (ISDN), local area network (LAN), wide area network (WAN), background lighting and other fields, 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 in the industrial field has expanded to a wider range such as (-40°C to 85°C) for the required temperature range. 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 and transformers, which are m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36C04B35/26C04B35/622C04B35/64
Inventor 金鑫郭宾
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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