Super high magnetic conductivity, high courier temperature Mn-Zn ferrite and its preparation method

A ferrite, ultra-high magnetic technology, applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., can solve the problems of initial permeability, low Curie temperature, etc. The effect of reducing loss and simple process

Active Publication Date: 2008-01-16
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a Mn-Zn ferrite with ultra-high magnetic permeability and high Curie temperature and a pre

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Will Fe 2 O 3 (53.5 mol%), ZnO (21 mol%) and MnO (25.5 mol%) as the main components were compounded, vigorously mixed for 30 minutes, vibrated for 30 minutes, and the resulting mixture was placed in a rotary kiln and pre-fired at 800°C for 3 hours. The obtained calcined body is added with auxiliary components as shown in Tables 1 to 3: Adding the dispersant polycaprolactone in weight percentage relative to the ferrite component: 0.3-0.6wt%, deionized water 80-180wt%, binder PVA: 0.8-1.2wt%, defoaming agent n-octanol: 0.1-0.4wt%, steel ball 400-750wt%; sanding in a sand mill for 70 minutes, the slurry particle size is controlled at 0.8-1.2 microns , And then add PVA into it and granulate it by spray drying into particles with an average particle size of 80-200μm; using an automatic molding machine at a pressure of 7-11Mpa, it is molded into a blank with an outer diameter of 25mm, an inner diameter of 15mm, and a height of 6 -8.5mm sample ring; after heatin...

Example Embodiment

[0058] Example 2

[0059] Will Fe 2 O 3 (51 mol%), ZnO (23 mol%) and MnO (26 mol%) as the main components were compounded, vigorously mixed for 30 minutes, and vibrated for 30 minutes. The resulting mixture was placed in a rotary kiln at 850°C for pre-burning for 2 hours. The obtained calcined body is added with auxiliary components as shown in Table 4: The weight percentage of the dispersant polycaprolactone relative to the ferrite component is added: 0.3-0.6wt%, deionized water 80-180wt%, binder PVA: 0.8-1.2wt%, defoamer n-octanol: 0.1-0.4wt%, steel ball 400-750wt%; sand mill in a sand mill for 70 minutes, control the slurry particle size at 0.8-1.2 microns, and then PVA is added and granulated by spray drying into particles with an average particle size of 80-200μm; an automatic molding machine is used to form a blank with an outer diameter of 25mm, an inner diameter of 15mm, and a height of 6-8.5mm under a pressure of 7-11Mpa. Sample ring: After heating, keeping the temperatur...

Example Embodiment

[0088] Example 3

[0089] Will Fe 2 O 3 (53 mol%), ZnO (27 mol%) and MnO (20 mol%) as the main components were compounded, vigorously mixed for 30 minutes, and vibrated for 30 minutes, and the resulting mixture was placed in a rotary kiln at 900°C for pre-burning for 1 hour. The obtained calcined body is added with auxiliary components as shown in Table 6: the weight percentage of the dispersant polycaprolactone relative to the ferrite component is added: 0.3-0.6wt%, deionized water 80-180wt%, binder PVA: 0.8-1.2wt%, defoaming agent n-octanol: 0.1-0.4wt%, steel balls 400-750wt%; sand grinding in a sand mill for 70 minutes, the slurry particle size is controlled at 0.8-1.2 microns, and then PVA is added and granulated by spray drying into particles with an average particle size of 80-200μm; an automatic molding machine is used to form a blank with an outer diameter of 25mm, an inner diameter of 15mm, and a height of 6-8.5mm under a pressure of 7-11Mpa. Sample ring: After heating, k...

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Abstract

The invention provides a Mn-Zn ferrite with high magnetic conductivity and high magnetic inversion temperature; major components of the ferrite include manganese oxide, zinc oxide, and iron oxide, and auxiliary components include bismuth oxide, molybdenum oxide, and niobium oxide; wherein, the constituents of the major components are: manganese oxide calculated by 23-27 Moore (percent) of Mno, zinc oxide calculated by 20-26 Moore (percent) of ZnO; the rest is iron oxide; constituents of the auxiliary components are: bismuth oxide calculated by 0-0.08 weight (percent) (excluding zero) of Bi2O, molybdenum oxide calculated by 0-0.12 weight (percent) (excluding zero) of MoO3, and niobium oxide calculated by 0.01-0.1 weight (percent) (excluding zero) of Nb2O5; the crystal particle of Mn-Zn ferrite is 50-180micron; under the condition of 25 DEG C, 10KHz, and 0.25mT, the initial magnetic conductivity of the Mn-Zn ferrite is 15000-18000; under the condition of 100KHz and 0.25mT, the initial magnetic conductivity is 13000-15000, and the magnetic inversion temperature is above or equal to 130 DEG C; in addition, the method provides the production method for the Mn-Zn ferrite.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite and a preparation method thereof, in particular to a Mn-Zn ferrite with high magnetic permeability and high Curie temperature and a preparation method thereof; it belongs to the technical field of oxide magnetic materials. Background technique [0002] With the rapid development of electronic information industries such as communications, computers, and networks, as well as the development trend of miniaturization and light weight of electronic components, high-permeability manganese-zinc ferrite can be widely used in transformer cores, noise filters, and local area network isolation. Transformer and digital network transformer core, because it can significantly reduce the size of the transformer and reduce the loss, so its research has attracted much attention at home and abroad. In practical applications, the Mn-Zn ferrite not only needs high magnetic permeability, but also requires good frequency cha...

Claims

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Application Information

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IPC IPC(8): H01F1/34H01F41/02
Inventor 汪作国颜冲包大新何时金
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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