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Method for improving Bs of MnZn power ferrite material by moving valley point

A ferrite material and power technology, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problem of increased material loss, and achieve the effect of reducing loss, reducing high temperature loss, and improving Bs

Active Publication Date: 2020-07-03
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is in order to overcome by controlling Fe in the master recipe at present 2 o 3 Moving the valley point with the ZnO content, reducing the ZnO content and improving the Bs technology of the MnZn power ferrite material will increase the loss of the material, etc. A method of moving the valley point to increase the Bs of the MnZn power ferrite material is proposed

Method used

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  • Method for improving Bs of MnZn power ferrite material by moving valley point

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: a kind of method that moves valley point and improves MnZn power ferrite material Bs, comprises the following steps:

[0025] 1) 52.9mol% Fe 2 o 3 , 38.3mol% of MnO and 8.8mol% of ZnO are mixed, and the next sanding time is 1.5h at the material ball water ratio of 1:5:0.4;

[0026] 2) adding 10% of the total mass of the calcined material and glue with a mass fraction of 7.5%, spraying and granulating, and then pre-calcining at 900°C in a rotary kiln to obtain the calcined material;

[0027] 3) Add additives comprising the following components in the calcined material and account for the mass percentage of the calcined material: CaCO 3 0.03%, ZrO 2 0.04%, Co 2 o 3 0.44%, SnO 2 0.05%, followed by secondary sanding for 1.5h under the ratio of ball water to 1:5:0.4;

[0028]4) Add glue with a total mass of 10% of the secondary abrasive and a mass fraction of 7.5% to the secondary abrasive, spray and granulate, press at 6Mpa to form a standard ring, and ...

Embodiment 2

[0029] Embodiment 2: a kind of method that moves valley point and improves MnZn power ferrite material Bs, comprises the following steps:

[0030] 1) 53.3mol% Fe 2 o 3 , 39.08mol% of MnO and 7.62mol% of ZnO are mixed, and the water ratio of the material ball is 1:7:0.6 for the next sanding for 0.5h;

[0031] 2) adding 10% of the total mass of the calcined material and glue with a mass fraction of 7.5%, spraying and granulating, and then pre-calcining at 1000°C in a rotary kiln to obtain the calcined material;

[0032] 3) Add additives comprising the following components in the calcined material and account for the mass percentage of the calcined material: CaCO 3 0.03%, ZrO 2 0.04%, Co 2 o 3 0.48%, SnO 2 0.05%, followed by secondary sanding for 0.5h at the ratio of ball water to 1:7:0.6;

[0033] 4) Add glue with a total mass of 10% of the secondary abrasive and a mass fraction of 7.5% to the secondary abrasive, spray and granulate, press at 8Mpa to form a standard ring,...

Embodiment 3

[0034] Embodiment 3: a kind of method that moves valley point and improves MnZn power ferrite material Bs, comprises the following steps:

[0035] 1) 53.1mol% Fe 2 o 3 , 38.5 mol% of MnO and 8.4 mol% of ZnO are mixed, and the next sanding time is 1h at the material ball water ratio of 1:6:0.5;

[0036] 2) adding 10% of the total mass of the calcined material and glue with a mass fraction of 7.5%, spraying and granulating, and then pre-calcining at 950°C in a rotary kiln to obtain the calcined material;

[0037] 3) Add additives comprising the following components in the calcined material and account for the mass percentage of the calcined material: CaCO 3 0.03%, ZrO 2 0.04%, Co 2 o 3 0.52%, SnO 2 0.05%, followed by secondary sanding for 1h at the ratio of ball water to 1:6:0.5;

[0038] 4) Add glue with a total mass of 10% of the secondary abrasive and a mass fraction of 7.5% to the secondary abrasive, spray and granulate, press at 7Mpa to form a standard ring, and then...

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Abstract

The invention discloses a method for improving the Bs of a MnZn power ferrite material by moving a valley point, and relates to the field of MnZn power ferrite material preparation. The method comprises the following steps: 1) mixing Fe2O3, MnO and ZnO, and carrying out primary sanding; 2) adding glue, carrying out spray granulation, and then pre-sintering to obtain a pre-sintered material; 3) adding an additive into the pre-sintered material, and carrying out secondary sanding; 4) adding glue into the secondary sanded material, carrying out spray granulation, pressing into a standard ring, and sintering. The valley point is controlled and moved by controlling the Fe2O3 content and the Co2O3 content, so the loss is reduced, the Bs of the material is improved, and the problem that the valley point moving, the loss reducing and the Bs of the material cannot be considered at the same time in the prior art is solved; and the method is simple and convenient and is suitable for industrialization.

Description

technical field [0001] The invention relates to the field of preparation of MnZn power ferrite materials, in particular to a method for moving a valley point to improve Bs of MnZn power ferrite materials. Background technique [0002] The existing MnZn power ferrite materials move the valley point, and it is generally considered that Fe in the main formula 2 o 3 The loss valley point with high content moves to the low temperature, Fe 2 o 3 The loss valley point with low content moves to high temperature, or by controlling Fe 2 o 3 And the ZnO content moves the valley point, reducing the ZnO content increases the Bs of the MnZn power ferrite material. Existing technology, relying on Fe 2 o 3 High and low content moving valley point will increase high temperature loss or reduce Bs, Fe 2 o 3 With high content, the valley point moves to low temperature, and the loss will increase at high temperature, especially after 100°C, reducing Fe 2 o 3 The content will reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/64H01F41/02
CPCC04B35/2658C04B35/64H01F41/02C04B2235/3208C04B2235/3293C04B2235/3244C04B2235/3275C04B35/265C04B2235/3284C04B2235/3262C04B35/6262C04B2235/96H01F41/0246H01F1/344C04B35/62695C04B2235/602C04B35/62685C04B35/634
Inventor 吕东华
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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