Dispersing agent for permanent magnetic ferrite material as well as preparation method and application of dispersing agent

A permanent magnet ferrite and dispersant technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems affecting production efficiency and yield, affecting product performance, magnet cracking, etc., to achieve low cost and improve fluidity , remanence and coercive force enhancement effect

Active Publication Date: 2021-12-17
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the multiple hydrophilic groups of calcium gluconate have strong water retention, if it is added too much, it will cause difficulty in removing water during the molding process, and the residual calcium gluconate will decompose during the sintering process, resulting in cracking of the magnet, affecting Production efficiency and yield
If too little calcium gluconate is added, it will be difficult to fully disperse the slurry, which will affect the performance of the product. This has always been an important problem that plagues ferrite manufacturers.

Method used

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  • Dispersing agent for permanent magnetic ferrite material as well as preparation method and application of dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The synthesis of dispersant: get 10kg of commercially available citric acid solids and place them in a plastic bucket, add 10kg of tap water and fully stir and mix evenly until citric acid is completely dissolved; 6kg, stir evenly; (3) further in above-mentioned solution, add the sodium hydroxide solid of about 10kg and uniformly stir, the pH value of test solution is 6, obtains liquid dispersant of the present invention, numbering is FS1#.

Embodiment 2

[0038] The synthesis of dispersant: get commercially available citric acid solid 10kg and place it in a plastic bucket, add 10kg of tap water and fully stir and mix evenly until citric acid is completely dissolved; (2) add 10kg of ammonia water with a concentration of 25% , stir evenly; (3) further in above-mentioned solution, add the sodium hydroxide solid of about 5kg and evenly stir, the pH value of test solution is 5, obtains liquid dispersant of the present invention, numbering is FS2#.

Embodiment 3

[0040] The synthesis of dispersing agent: get commercially available citric acid solid 10kg and place in plastic bucket, add the tap water of 10kg and fully stir and mix evenly, until citric acid dissolves completely; , stir evenly; (3) further add the sodium hydroxide solid of about 8kg in above-mentioned solution and uniformly stir, and the pH value of test solution is 6, obtains liquid dispersant of the present invention, numbering is FS3#.

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Abstract

The invention belongs to the technical field of permanent magnetic ferrite materials, and discloses a dispersing agent for a permanent magnetic ferrite material as well as a preparation method and application thereof. The dispersing agent for the permanent magnetic ferrite material is prepared by mixing citric acid, ammonia water, sodium hydroxide and water, the mass concentration of the ammonia water is 20-30%, the mass ratio of the citric acid to the water to the ammonia water is 1: (0.7-1.3): (0.5-1.5), and the pH value of the dispersing agent is 4-7. The dispersing agent is a water-based dispersing agent which is autonomously synthesized from cheap industrial raw materials, can be applied to the preparation process of a permanent magnetic ferrite material, can effectively improve the comprehensive magnetic performance of the material, and basically does not influence the yield of a final product.

Description

technical field [0001] The invention relates to the technical field of permanent magnet ferrite materials, in particular to a dispersant for permanent magnet ferrite materials and a preparation method and application thereof. Background technique [0002] Permanent ferrite magnets are one of the basic functional materials of permanent magnet DC motors. They can meet the requirements of motors in various environments. They have high sensitivity and stability and can be widely used in various applications with high power, high speed and high torque. Class motors, such as high-end automotive motors (ABS motors, starter motors, etc.), motorcycle starter motors, household appliances and electric tool motors, etc. As motors and generators are becoming more and more miniaturized and lightweight, the market requires further improvement of the magnetic properties of ferrite permanent magnets. [0003] The magnetic properties of permanent magnet materials mainly include three paramet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14C04B35/26C04B35/626
CPCC09K3/1463C04B35/26C04B35/6261
Inventor 杨武国申屠金昂何震宇蒋有福厉一俊陆荐良
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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