MnZn ferrite material in lean iron formula and preparation method thereof

A ferrite material and formula technology, applied in the field of oxide magnetic materials, can solve the problems of low resistivity and high frequency loss, and achieve the effects of high Curie temperature, low high frequency loss and high resistivity

Inactive Publication Date: 2010-08-18
苏州天铭磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the disadvantages of relatively small resistivity and relatively large high-frequency loss existing in the existing MnZn ferrite, the present invention provides a ferrite with high resisti

Method used

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  • MnZn ferrite material in lean iron formula and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Ingredients: ingredients are made according to the main components and content. Weigh the Fe with a purity of 98.5wt% 2 o 3 , MnO with a purity of 98%, ZnO with a purity of 99.7%, the molar ratio of the three is 45:31.7:23.3;

[0027] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:ethanol=2:1:1, and then wet mill in a ball mill. The ball milling time is 2 hours, the rotation speed is 400r / min, and the forward and reverse rotation is 3 times;

[0028] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 900°C, and the holding time is 2h;

[0029] (4) Secondary ball milling and doping: Weigh the pre-fired powder and auxiliary components, chemically pure SnO 2 0.3 wt% and analytically pure ZrO 2 Put 0.1wt% into the ball mill jar, then add pellets respectively according to the mass ratio of balls: material: ethanol = 2:1:1, then add ethanol, ...

Embodiment 2

[0034] (1) Ingredients: ingredients are made according to the main components and content. Weigh the Fe with a purity of 98.5wt% 2 o 3 , MnO with a purity of 98%, ZnO with a purity of 99.7%, the molar ratio of the three is 47:33.1:19.9;

[0035] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:ethanol=2:1:1, and then wet mill in a ball mill. The ball milling time is 1h, the rotation speed is 300r / min, and the forward and reverse rotation is 3 times;

[0036] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 800°C, and the holding time is 4h;

[0037] (4) Secondary ball milling and doping: Weigh the pre-fired powder and auxiliary components, chemically pure SnO 2 0.1 wt% and analytically pure ZrO 2 Put 0.5wt% into the ball mill jar, then add pellets respectively according to the mass ratio of ball: material: ethanol = 2:1:1, then add ethanol, stir e...

Embodiment 3

[0042] (1) Ingredients: ingredients are made according to the main components and content. Weigh the Fe with a purity of 98.5wt% 2 o 3 , MnO with a purity of 98%, ZnO with a purity of 99.7%, the molar ratio of the three is 49:34.5:16.5;

[0043] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:ethanol=2:1:1, and then wet mill in a ball mill. The ball milling time is 4 hours, the rotation speed is 500r / min, and the forward and reverse rotation is 3 times;

[0044] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 1000°C, and the holding time is 1h;

[0045] (4) Secondary ball milling and doping: Weigh the pre-fired powder and auxiliary components, chemically pure SnO 2 0.5 wt% and analytically pure ZrO 2 0.2wt% is put into the ball mill jar, and then according to the mass ratio of balls: material: ethanol = 2: 1: 1, add small balls respectively, the...

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Abstract

The invention discloses an MnZn ferrite material in a lean iron formula; the material is prepared from main components and auxiliary components, wherein the main components and the molar percentage are as follows by oxide: Fe2O3: 45 to 49mol percent; MnO: 31.7 to 34.5 mol percent; and the balance ZnO; the auxiliary components and the weight percentage are as follows by oxide: SnO2: 0.1 to 0.5 weight percent; ZrO2: 0.1 to 0.5 weight percent; the invention also relates to a preparation method of the MnZn ferrite material in the lean iron formula, which comprises the following steps: (1) material preparation; (2) primary ball milling; (3) pre-burning; (4) secondary ball milling and doping; (5) adhesive adding and granulation; (6) forming; (7) sintering; the invention controls the content of the main components, particuarlly adopts lean iron, adds special auxiliary components into the main components, so as to prepare iron material which has higher resistivity, lower high-frequency loss, and simultaneously has higher saturation magnetic induction, higher curie temperature and other excellent integrated performance; and the preparation method of the invention not only has low cost and simple process, but also strictly controls the temperature curve, and carries out atmosphere protection.

Description

technical field [0001] The invention relates to a MnZn ferrite material, in particular to a ferrite material with high resistivity, low high-frequency loss, high saturation magnetic induction and high Curie temperature and other excellent comprehensive properties and its preparation The method belongs to the technical field of oxide magnetic materials. technical background [0002] With the rapid development of the electronic information industry and the development of electronic equipment in the direction of lightness, integration, intelligence and multi-function, the demand for high-performance soft magnetic materials has increased sharply. The world's major magnetic material production companies have invested heavily in research and development. Development and production of high-performance soft magnetic materials. Among soft magnetic materials, soft magnetic ferrite is the most used and widely used material, and MnZn ferrite is the dominant one in the production and us...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 魏瑞明戴建中陆静军邹仲鹤
Owner 苏州天铭磁业有限公司
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