Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing soft magnetic ferrite precursor by coprecipitation method

A technology of soft ferrite and co-precipitation method, which is applied to magnetic objects, chemical instruments and methods, inductance/transformer/magnet manufacturing, etc. The effect of high dispersibility and uniform particle size

Active Publication Date: 2021-07-20
CHINA ENFI ENGINEERING CORPORATION
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a method for preparing soft ferrite precursor by co-precipitation method to solve the problem of inhomogeneity of soft ferrite particles prepared by co-precipitation method in the prior art

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix manganese sulfate, zinc sulfate, and ferrous sulfate at a molar ratio of 0.6:0.4:2.0 to prepare a metal salt solution with a total metal salt concentration of 100g / L. The precipitant is prepared as an aqueous solution of sodium hydroxide with a mass concentration of 10%, and the dispersant is ethylene glycol. The prepared 1000mL metal salt aqueous solution and 1150mL sodium hydroxide aqueous solution were slowly added to the reaction kettle at multiple points for co-precipitation reaction. A stirring paddle was set in the stirring kettle, the reaction temperature was 60°C, the reaction time was 2h, and the pH value was 10.0. The process sets the speed of the stirring paddle to 1400rpm; after stopping feeding, add a dispersant, the amount of which is 0.1% of the total volume of the sodium hydroxide aqueous solution and the metal salt solution, and continue stirring for 0.5h to complete the co-precipitation reaction. This process sets the stirring paddle The rotationa...

Embodiment 2

[0037] Mix magnesium chloride, zinc chloride, and ferric chloride at a molar ratio of 0.8:0.2:2.0 to prepare a metal salt solution with a total metal salt concentration of 120g / L. The precipitating agent is prepared as 8% ammonium bicarbonate aqueous solution, and the dispersing agent is ethanol. Slowly add the prepared 1000mL metal salt aqueous solution and 1050mL ammonium bicarbonate aqueous solution into the reaction kettle for co-precipitation reaction. A stirring paddle is set in the stirring kettle, the reaction temperature is 70°C, the reaction time is 3h, and the pH value is 9.0. Set the rotating speed of the stirring paddle to 1300rpm; after stopping feeding, add a dispersant, the amount added is 0.1% of the total volume of the ammonium bicarbonate aqueous solution and the metal salt aqueous solution, and continue to stir for 0.5h to complete the co-precipitation reaction. In this process, set the rotating speed of the stirring paddle 800rpm.

[0038] The magnetic su...

Embodiment 3

[0040] Mix cobalt nitrate, zinc nitrate, and ferrous sulfate at a molar ratio of 0.7:0.3:2.0 to prepare a metal salt solution with a total metal salt concentration of 80g / L. The precipitant is prepared as 9% sodium hydroxide aqueous solution, and the dispersant is EDTA. Slowly add 1000mL of the prepared metal salt aqueous solution and 950mL of sodium hydroxide aqueous solution into the reaction kettle for co-precipitation reaction. A stirring paddle is set in the stirring kettle, the reaction temperature is 80°C, the reaction time is 3h, and the pH value is 8.5. This process Set the rotating speed of the stirring paddle to be 1200rpm; after stopping feeding, add a dispersant, the amount of addition is 0.1% of the total volume of the sodium hydroxide aqueous solution and the metal salt solution, and continue to stir for 0.5h to complete the co-precipitation reaction. The speed is 500rpm.

[0041] The magnetic substance-containing slurry obtained after the co-precipitation reac...

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
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a soft magnetic ferrite precursor by a coprecipitation method. The method comprises the steps that S1, allowing materials including a metal salt solution, a coprecipitator solution and a dispersing agent to be mixed and then subjected to a coprecipitation reaction to obtain slurry with precipitates, wherein the dispersing agent is selected from any one of ethyl alcohol, ethylene glycol, ethylenediaminetetraacetic acid, polyethyleneimine and sodium dodecyl benzene sulfonate; step S2, washing the precipitate to obtain a neutral precipitate; and S3, carrying out vacuum low-temperature drying on the neutral precipitate at a temperature of 50-60 DEG C to obtain the soft magnetic ferrite precursor. The dispersing agent is used in the coprecipitation process, and agglomeration of particles in the coprecipitation process is effectively relieved; and the neutral precipitate is dried by adopting vacuum low-temperature drying, so that hardening is effectively avoided, the high dispersity of the neutral precipitate is kept, and the soft magnetic ferrite precursor with relatively uniform particle size can be obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of soft ferrite, in particular to a method for preparing a soft ferrite precursor by a co-precipitation method. Background technique [0002] Soft ferrite materials, namely magnetic ceramics, are based on manganese-zinc ferrite and can be doped with different metals. This material has many advantages such as high dielectric property, high frequency, low loss, and high magnetic permeability, and can be widely used in communications, television, computer and other industries. [0003] Soft ferrite magnetic materials are widely used in frequency conversion circuits due to their high saturation magnetization, high dielectric resistivity, high permeability and low coercivity, easy to be magnetized and demagnetized, and low core loss. . At present, electronic devices tend to be miniaturized and intelligently developed, which puts forward higher requirements for the performance of soft ferrite magn...

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): C01G49/00B82Y30/00H01F1/34H01F41/02
CPCC01G49/0072C01G49/0063H01F41/02H01F1/344B82Y30/00C01P2004/64
Inventor 刘苏宁孙宁磊李诺曹敏彭建华
Owner CHINA ENFI ENGINEERING CORPORATION