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Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material

A technology of zinc ferrite and high conductivity, which is applied in the field of manganese-zinc ferrite magnet materials and the preparation of high-conductivity manganese-zinc ferrite and soft magnetic manganese-zinc ferrite products, which can solve the problem of It is difficult to solve the problems of high magnetic permeability and small specific loss coefficient, so as to achieve the effect of reasonable ratio, increased resistivity, and improved magnetic permeability-temperature characteristics

Active Publication Date: 2005-11-16
SUZHOU GUANDA MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even if the selection and ratio of the main and auxiliary raw materials constituting the ferrite magnet material are perfect to the extreme, it is still difficult to obtain a ferrite product with a high magnetic permeability and a small specific loss coefficient with a satisfactory pass rate.

Method used

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  • Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material
  • Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material
  • Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, the selected components are 52.2mol% of iron oxide, 25mol% of manganese oxide, and 22.8mol% of zinc oxide. Vibrate the ball mill for 0.6h to obtain fine powder, send the vibrated fine powder to the electric rotary kiln for pre-calcination, the pre-fire temperature is 950°C, the time is 2h, after cooling, add the preferred component of CaO 0.05WT% 、TiO 2 0.06wt%, Bi 2 o 3 0.03wt% auxiliary raw material after weighing, send into sand mill sand mill 2h, in sand mill process, control material: ball: the ratio of water is 1: 1: 0.6, the grain size of the material after sand mill is below 1 μm , and then use spray drying equipment to make the slurry obtained by sand grinding into granules, that is, spray granulation, and add 10% of the amount of PVA aqueous solution before spraying. The requirements for the particles are: water content 0.15-0.25%, particle size distribution 100- 200μm accounts for 75%, flow angle is 26-35°, bulk specific gravity is 1.35~1.45g / cm 3 ...

Embodiment 2

[0032] Only the iron oxide, manganese oxide, and zinc oxide of the main raw material components were changed to Fe 2 o 3 52.2mol%, MnO24.6mol%, ZnO23.2mol%, the initial magnetic permeability of the obtained finished ferrite i =13400, specific loss coefficient tgδ / μ i =3×10 -6 (f: 10kHZ), all the other are the same as embodiment 1.

Embodiment 3

[0034] Only the iron oxide, manganese oxide, and zinc oxide of the main raw material components were changed to Fe 2 o 3 52.8mol%, MnO24.0mol%, ZnO23.2mol%, the initial magnetic permeability of the obtained finished ferrite i =12800, specific loss coefficient tgδ / μ i =2.8×10 -6 (f: 10kHZ), all the other are the same as embodiment 1.

[0035] The ideal physical properties shown by the test of the ferrite products obtained in the foregoing embodiments are shown in the following table:

[0036]

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Abstract

Mixed main material including 51.5-52.8 mol% ferric oxide, 23.3-26.0 mol% manganese oxide, and 22.5-24.0 mol% zinc oxide is processed through shake grinding and pre-burning procedures. Next, auxiliary materials including 500-1000ppm calcium oxide, 300-1500ppm titanium oxide and 100-400ppm bismuth oxide are added to the said processed main material. Then, procedures including sand mill, granulation, body blank and burning are carried out in sequence to produce products. Advantages are: reasonable compounding ratio between main and auxiliary materials provides precondition for producing the disclosed product in high magnetic permeability and low coefficient of specific loss; optimized curve of agglomeration technology prevents oxidation of products, and improves temperature and even atmosphere in kiln. The product shows preferred initial permeability, coefficient of specific loss and coefficient of specific temperature.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite magnet material and a method for preparing high-conductivity manganese-zinc ferrite with the material, more specifically, it relates to the selection of magnet materials for soft magnetic manganese-zinc ferrite and its A soft magnetic manganese-zinc ferrite product with high magnetic permeability is prepared by using selected materials, which belongs to the technical field of magnetic materials and processing. Background technique [0002] With the rapid development of the information industry (IT), the traditional soft magnetic ferrite can no longer meet the requirements of emerging IT, so that the manganese-zinc ferrite with high magnetic permeability is increasingly valued by the industry and has become an IT technology important parts of. Since most of the various power transformers used in the communication field work under low magnetic flux density, if the ferrite material can be reasonably selec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34
Inventor 孟力丁伟清孟祥宇
Owner SUZHOU GUANDA MAGNET
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