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Preparation method of strontium ferrite magnetic powder for high-quality injection molding

A strontium ferrite magnetic powder, high-quality technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of poor quality, high processing temperature, low magnetic properties of products, etc., to improve the uniformity of coating properties, improved surface properties, and good magnetic properties

Inactive Publication Date: 2017-09-12
马鞍山起劲磁塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol-gel method is one of the commonly used methods for preparing strontium ferrite magnetic powder. At present, this method has the problems of low magnetic properties of the product, high processing temperature, and poor quality of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing high-quality strontium ferrite magnetic powder for injection molding, comprising the following steps:

[0020] (1) Mixing of raw materials:

[0021] a. First mix strontium carbonate and iron nitrate crystals. After mixing, the molar ratio of strontium to iron in strontium carbonate and iron nitrate is 1:12, then add nitric acid 1 times the total mass of strontium carbonate and iron nitrate crystals, 7 times Deionized water, after stirring continuously for 30min, mixture A was obtained for subsequent use;

[0022] b. Add 3% of the total mass of pentasodium diethylenetriaminepentamethylene phosphonate, 0.1% ethylenediaminetetraacetic acid, 0.2% sodium tartrate, and 0.1% diethylene trioxide to the mixture A obtained in operation a. Secret, after stirring constantly to process evenly, then adjust the overall pH value to be 6.5~7.0 to obtain mixture B for later use;

[0023] (2) Roasting treatment:

[0024] Put the mixture B obtained in step (1) int...

Embodiment 2

[0030] A method for preparing high-quality strontium ferrite magnetic powder for injection molding, comprising the following steps:

[0031] (1) Mixing of raw materials:

[0032] a. First mix strontium carbonate and iron nitrate crystals. After mixing, the molar ratio of strontium to iron in strontium carbonate and iron nitrate is 1:12.5, then add nitric acid 1.1 times the total mass of strontium carbonate and iron nitrate crystals, 8 times Deionized water was stirred continuously for 35 minutes to obtain mixture A for subsequent use;

[0033] b. Add 4% of the total mass of pentasodium diethylenetriaminepentamethylene phosphonate, 0.2% ethylenediaminetetraacetic acid, 0.4% sodium tartrate, and 0.13% diethylene trioxide to the mixture A obtained in operation a. Secret, after stirring constantly to process evenly, then adjust the overall pH value to be 6.5~7.0 to obtain mixture B for later use;

[0034] (2) Roasting treatment:

[0035] Put the mixture B obtained in step (1) i...

Embodiment 3

[0041] A method for preparing high-quality strontium ferrite magnetic powder for injection molding, comprising the following steps:

[0042] (1) Mixing of raw materials:

[0043] a. First mix strontium carbonate and iron nitrate crystals. After mixing, the molar ratio of strontium to iron in strontium carbonate and iron nitrate is 1:13, then add nitric acid 1.2 times the total mass of strontium carbonate and iron nitrate crystals, 9 times Deionized water, stirring continuously for 40min to obtain mixture A for subsequent use;

[0044] b. Add 5% of the total mass of pentasodium diethylenetriaminepentamethylene phosphonate, 0.3% ethylenediaminetetraacetic acid, 0.5% sodium tartrate, 0.15% diethylene trioxide to the mixture A obtained in operation a. Secret, after stirring constantly to process evenly, then adjust the overall pH value to be 6.5~7.0 to obtain mixture B for later use;

[0045] (2) Roasting treatment:

[0046] Put the mixture B obtained in step (1) into a roastin...

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PUM

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Abstract

The invention discloses a preparation method of strontium ferrite magnetic powder for high-quality injection molding. The preparation method includes steps: (1) raw material mixing, (2) calcining treatment; (3) ball milling and grinding. By reasonable adjustment and optimization of each procedure in the manufacturing process, finally prepared strontium ferrite magnetic powder has excellent injection molding characteristics and great magnetic performances, and problems of weak saturation magnetization and intrinsic coercivity of existing strontium ferrite are improved.

Description

technical field [0001] The invention belongs to the technical field of magnetic material processing, and in particular relates to a method for preparing high-quality strontium ferrite magnetic powder for injection molding. Background technique [0002] Magnetic materials, commonly referred to as magnetic materials refer to strong magnetic substances, which are ancient and widely used functional materials, and the magnetism of substances has been recognized and applied by people as early as 3,000 years ago. For example, natural magnets were used as compass in ancient China . Modern magnetic materials have been widely used in our lives, such as using permanent magnet materials as motors, core materials used in transformers, magneto-optical disks used as memories, magnetic recording floppy disks for computers, etc. Ferrite permanent magnet material is a kind of permanent magnet material, it is based on BaFe 12 o 19 phase, SrFe 12 o 19 Phases and their solid solution-based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626C04B35/632H01F1/03
CPCC04B35/2683C04B35/62605C04B35/632C04B2235/3298H01F1/0315
Inventor 周国胜
Owner 马鞍山起劲磁塑科技有限公司
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