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A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method

A technology of magnetic materials and ferrites, applied in the field of magnetic materials, can solve the problems of large increase in power loss, and achieve the effects of low production cost, saturation magnetic induction intensity, and low power consumption

Active Publication Date: 2008-04-30
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A typical example is the automatic electronic equipment installed in the vicinity of the automobile engine. Their operating temperature can exceed 140°C. The power loss of most soft ferrites has a positive temperature coefficient in this area, and the power loss increases greatly.

Method used

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  • A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method
  • A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Ingredients: according to the weight percentage of the main formula and auxiliary formula in terms of oxides, the main formula is Fe 2 o 3 is 53.18mol%; ZnO is 6.17ol%; MnO is 40.65mol%; the auxiliary formula is CaO: 600ppm, Nb 2 o 5 : 250ppm, ZrO 2 : 150ppm, Co 2 o 3 : 1800ppm.

[0035] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0036] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0037] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 950°C for 2.5 hours.

[0038] 5. Sand milling: use a circulating sand mill for sand milling, and the sand milling time is 2 hours; wherein material: ball: water = 1: 1: 0.6; the average particle size of the powder after sand milling is 1.0-1.2 μm.

[0039] 6. Granulation molding: use a granulator for granulation, and then use a fully automatic dry press for mo...

Embodiment 2

[0055] 1. Fe 2 o 3 is 53.18mol%; ZnO is 6.17mol%; MnO is 40.65mol%; the auxiliary formula is CaO: 600ppm, Nb 2 o 5 : 250ppm, ZrO 2 : 150ppm, Co 2 o 3 : 1000pm.

[0056] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0057] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0058] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 950°C for 2.5 hours.

[0059] 5. Sand milling: use a circulating sand mill for sand milling, and the sand milling time is 2 hours; wherein material: ball: water = 1: 1: 0.6; the average particle size of the powder after sand milling is 1.0-1.2 μm.

[0060] 6. Granulation molding: use a granulator for granulation, and then use a fully automatic dry press for molding, wherein the inlet temperature is controlled at 270°C during granulation, the outlet temperature is 130°C, and the density o...

Embodiment 3

[0064] 1. Ingredients: according to the weight percentage of the main formula and auxiliary formula in terms of oxides, the main formula is Fe 2 o 3 is 53.18mol%; ZnO is 6.17mol%; MnO is 40.65mol%; the auxiliary formula is CaO: 600ppm, Nb 2 o 5 : 250ppm, ZrO 2 : 150ppm, Co 2 o 3 : 5000ppm. .

[0065] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0066] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0067] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 950°C for 2.5 hours.

[0068] 5. Sand milling: use a circulating sand mill for sand milling, and the sand milling time is 2 hours; wherein material: ball: water = 1: 1: 0.6; the average particle size of the powder after sand milling is 1.0-1.2 μm.

[0069] 6. Granulation molding: use a granulator for granulation, and then use a fully automatic dry press fo...

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Abstract

The invention relates to a Mn-Zn ferrite magnetic material and a preparation method thereof. The main component and content of the Mn-Zn ferrite magnetic material are calculated as oxides: 52-56 mol% of Fe2O3; 2-10 mol of ZnO %; MnO is 38-42mol%; auxiliary components are: CaO: 400-800ppm, Nb2O5: 100-400ppm, ZrO2: 100-800ppm, Co2O3: 1000-5000ppm or a combination, it is a kind of high saturated Mn-Zn ferrite magnetic material with magnetic induction, low power consumption and excellent electromagnetic characteristics under ultra-high temperature conditions.

Description

technical field [0001] The invention relates to a Mn-Zn ferrite magnetic material, in particular to a low-power consumption Mn-Zn ferrite magnetic material applied under ultra-high temperature conditions and a preparation method thereof, belonging to the technical field of magnetic materials. Background technique [0002] At present, the lowest power loss range of most soft ferrites is between 80 and 100 °C. For example, the 3C94 and 3C96 materials of Philips, and the 4H45 and 4H47 materials announced by Japan's FDK Company all have the characteristics of high temperature, high Bs, and low power consumption; but these materials are generally used in conventional electronic circuits. For safety reasons its maximum working temperature does not exceed 100°C. If the working temperature exceeds 100°C, it is not suitable and may even cause a fire. A typical example is the automatic electronic equipment installed in the vicinity of the automobile engine. Their operating temperatu...

Claims

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Application Information

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IPC IPC(8): H01F1/10C04B35/26C04B35/64
Inventor 金鑫严正信杨正忠包大新
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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