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Preparation method of permanent ferrite material

A technology of permanent magnet ferrite and ferrite, which is applied in the direction of magnetism of inorganic materials, can solve the problems of high price, poor combination and compactness, and the inability to further reduce the cost, and achieve the effect of excellent performance, compact material, and cost saving of raw materials

Inactive Publication Date: 2019-10-25
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention is to overcome the permanent ferrite material in the prior art by directly adding cobaltous oxide and cobalt oxide to improve material performance, but its price is relatively high, resulting in the cost cannot be further reduced, and at the same time due to the combination of cobaltous oxide and cobalt oxide The bonding density between the base ferrite materials is poor, so the performance improvement is limited

Method used

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  • Preparation method of permanent ferrite material
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  • Preparation method of permanent ferrite material

Examples

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Embodiment 1

[0032] A kind of permanent magnet ferrite material, described permanent magnet ferrite material has Sr 0.43 Ca 0.15 La 0.42 Fe 10.95 co 0.25 o 19 Main phase ferrite material, its preparation method is as follows:

[0033] (1) Calcined material preparation: according to the molar ratio of Sr: Ca: La: Fe: Co is 0.43: 0.15: 0.42: 10.95: 0.25 and then weigh Fe 2 o 3 (purity≥99.3wt%, Cl - ≤0.1wt%, the original average particle size of the particles ≤1.5um), CaCO 3 (purity≥98.5wt%, the original average particle size of particles≤1.0um), La 2 o 3 (Purity≥99.3wt%, original average particle size of particles≤5um), cobalt carbonate (original average particle size≤3um), SrCO 3 (purity≥97wt%, the original average particle size of the particles≤1.5um) and other raw materials are subjected to wet primary ball milling, the ball milling time is 5 hours, the average particle size of the mixed particles is 0.8um, and then the slurry is dried in an oven, After 10MPa pressure pre-compr...

Embodiment 2

[0047] A kind of permanent magnet ferrite material, described permanent magnet ferrite material has Sr 0.5 Ca 0.18 La 0.32 Fe 10.75 co 0.25 o 19 Main phase ferrite material, its preparation method is as follows:

[0048] (1) Calcined material preparation: Weigh Fe according to the molar ratio of Sr: Ca: La: Fe: Co 0.5: 0.18: 0.32: 10.75: 0.25 2 o 3 (purity≥99.3wt%, Cl - ≤0.1wt%, the original average particle size of the particles ≤1.5um), CaCO 3 (purity≥98.5wt%, the original average particle size of particles≤1.0um), La 2 o 3 (purity≥99.3wt%, the original average particle size of particles≤5um), Co 2 o 3 (the original average particle size of particles≤3um), SrCO 3 (purity≥97wt%, the original average particle size of the particles≤1.5um) and other raw materials were wet-processed for a ball mill, and the ball milling time was 3 hours. The average particle size of the mixed particles was 0.9um, and then the slurry was dried in an oven. After 8 MPa pressure pre-comp...

Embodiment 3

[0062] A kind of permanent magnet ferrite material, described permanent magnet ferrite material has Sr 0.35Ca 0.22 La 0.43 Fe 11.32 co 0.28 o 19 Main phase ferrite material, its preparation method is as follows:

[0063] (1) Preparation of calcined material: Weigh Fe according to the molar ratio of Sr: Ca: La: Fe: Co: 0.35: 0.22: 0.43: 11.32: 0.28 2 o 3 (purity≥99.3wt%, Cl - ≤0.1wt%, the original average particle size of the particles ≤1.5um), CaCO 3 (purity≥98.5wt%, the original average particle size of particles≤1.0um), La 2 o 3 (purity≥99.3wt%, the original average particle size of particles≤5um), Co 2 o 3 (the original average particle size of particles≤3um), SrCO 3 (purity ≥ 97wt%, original average particle size of particles ≤ 1.5um) and other raw materials were subjected to wet primary ball milling, the ball milling time was 8 hours, the average particle size of the mixed particles was 0.6um, and then the slurry was dried in an oven. After 12MPa pressure pre...

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Abstract

The invention relates to the field of permanent ferrite, in particular to a preparation method of a permanent ferrite material. The preparation method includes the steps that (1), a pre-burned material is prepared, specifically, the ferrite raw material is weighed according to the proportion, ball milling is carried out with a wet method at one time, the ferrite raw material is pre-pressed after being dried, and then pre-burned to obtain a block pre-burned material, and then the block pre-burned material is crushed to obtain pre-burned material powder; (2), crushing through the wet method is carried out, specifically, the pre-burned material powder and additives are ground under the condition of deionized water as a ball milling medium to obtain slurry for forming; (3), forming is carriedout, specifically, the forming slurry is subjected to centrifugal dehydration, and then pressed for forming under the condition of applying a forming magnetic field; and (4) sintering is carried out,specifically, a forming body is subjected to heat treatment to completely remove water and then sintered in the air to obtain the sintered body. According to the preparation method of the permanent ferrite material, the defects of high cost, low compactness and poor performance of the permanent ferrite material in the prior art are overcome, and the preparation method of the permanent ferrite material has the advantages of reducing the cost and even better performance of the ferrite material.

Description

technical field [0001] The invention relates to the field of permanent magnet ferrite, in particular to a preparation method of a permanent magnet ferrite material. Background technique [0002] Magnetic materials are the basic functional materials in the electronics industry. As an important part of magnetic materials, permanent magnet materials play an important role in electronics industry, information industry, motorcycle, electric tool industry, automobile industry and other industries. [0003] The performance of M-type permanent ferrite is significantly improved by one or two additions of lanthanum and cobalt ion replacement, which makes power electronic devices develop towards miniaturization and high performance, which meets the national industrial planning policy requirements for electronic materials. At the same time, the automobile industry is transitioning from traditional fuel vehicles to new energy vehicles, which has pushed up the price of cobalt oxides and ...

Claims

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Application Information

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IPC IPC(8): C04B35/40C04B35/622H01F1/11
CPCC04B35/2633C04B35/2641C04B35/2666C04B35/622C04B2235/3208C04B2235/3213C04B2235/3227C04B2235/3275C04B2235/3409C04B2235/3418C04B2235/6562C04B2235/6567H01F1/11
Inventor 丁伯明叶华胡良权吕舒宏
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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