Permanent magnetic strontium-ferrite material powder and preparation method thereof

A technology of strontium ferrite and material powder, which is applied in the field of permanent magnet strontium ferrite material powder and its preparation, can solve the problems of reducing the magnetic properties of ferrite, and achieve excellent magnetic properties, simple process, and simple preparation process Effect

Inactive Publication Date: 2012-10-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, tartaric acid, ethylene glycol and ammonia water are easily i

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  • Permanent magnetic strontium-ferrite material powder and preparation method thereof
  • Permanent magnetic strontium-ferrite material powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A permanent magnet strontium ferrite powder and a preparation method thereof. Iron scale and analytically pure strontium carbonate are used as raw materials, wherein the molar ratio of analytically pure strontium carbonate to iron oxide is 1: (5.5~5.75), plus 0.1~0.5wt% polyethylene glycol of the raw material and 90~ 110wt% water to form a mixture; then according to the mass ratio of steel balls and raw materials (7.5-10): 1, the mixture is wet-milled in a steel ball mill tank until the particle size is 0.7-0.9 μm; Then the ball-milled slurry is dried, placed in a ceramic container and kept in a rotary kiln at 1050-1100°C for 120-240 minutes, and cooled naturally with the kiln to obtain permanent magnet strontium ferrite powder.

Embodiment 2

[0022] A permanent magnet strontium ferrite powder and a preparation method thereof. Iron scale and chemically pure strontium carbonate are used as raw materials, wherein the molar ratio of chemically pure strontium carbonate to iron oxide is 1: (5.5~5.75), plus 0.1~0.5wt% sorbitol of the raw material and 90~110wt of the raw material % water to form a mixture; then according to the mass ratio of steel balls and raw materials (7.5~10): 1, wet grind the mixture in a steel ball mill until the particle size is 0.7~0.9μm; then The ball-milled slurry is dried, placed in a ceramic container and kept in a rotary kiln at 1100-1150°C for 120-240 minutes, and cooled naturally with the kiln to obtain permanent magnet strontium ferrite powder.

Embodiment 3

[0024] A permanent magnet strontium ferrite powder and a preparation method thereof. Iron scale and industrial strontium carbonate are used as raw materials, wherein the molar ratio of industrial strontium carbonate to iron oxide is 1: (5.5~5.75), plus 0.1~0.5wt% calcium gluconate of the raw material and 90~110wt% of the raw material water to form a mixture; then according to the mass ratio of steel balls and raw materials (7.5-10): 1, wet-grind the mixture in a steel ball mill until the particle size is 0.7-0.9 μm; then The slurry after ball milling is dried, placed in a ceramic container and kept in a rotary kiln at 1150-1200°C for 120-240 minutes, and cooled naturally with the kiln to obtain permanent magnet strontium ferrite powder.

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Abstract

The invention relates to a permanent magnetic strontium-ferrite material powder and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps of: based on an iron scale and strontium carbonate as raw materials, adding a dispersant accounting for 0.1-0.5wt% of the raw material and water accounting for 90-110wt% of the raw material to form a mixture, wherein the molar ratio of strontium carbonate and ferric oxide is 1:(5.5-6); then wet-milling the mixture in a steel ball milling jar according to the mass ratio of steel balls to the raw material being (7.5-10):1 until the granularity reaches 0.7-0.9 micrometers; then drying the ball-milled slurry material, placing into a ceramic vessel, keeping the temperature at 1050-1350 DEG C in a rotary kiln for 120-240 minutes and then naturally cooling with the kiln, so as to obtain the permanent magnetic strontium-ferrite material powder. The preparation method of the permanent magnetic strontium-ferrite material powder has the characteristics of of simple process and low cost; and the magnetic property of the permanent magnetic strontium-ferrite material powder prepared by the method is good.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet ferrite materials, and in particular relates to a permanent magnet strontium ferrite powder and a preparation method thereof. Background technique [0002] Permanent magnet ferrite is currently the most widely used permanent magnet material with the largest output in the world. It is widely used in the electronics industry, household appliances and electrical equipment, such as various electric meters and household appliances in the electronics industry. To the horn, the motor in the electrical equipment and so on. The permanent magnet ferrite mainly plays the role of energy transfer, such as providing a constant magnetic field for the energized coil to make the coil rotate, or making the coil in the horn vibrate to make sound, or making the rotor in the motor rotate to provide mechanical energy, etc. [0003] NdFeB in permanent magnet materials has high magnetic energy and coercive forc...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/26H01F1/11
Inventor 李享成赵章朱伯铨
Owner WUHAN UNIV OF SCI & TECH
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