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
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of permanent ferrite material
  • Preparation method of permanent ferrite material
  • Preparation method of permanent ferrite material

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Heightaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap