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

Production method of pre-sintered material of permanent magnetic ferrite

A technology of permanent magnet ferrite and production method, which is applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc. Comprehensive performance, increase specific surface area, and increase the effect of adsorption performance

Inactive Publication Date: 2021-06-29
江苏启诚磁业有限公司
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large-scale and stable production of high-end, high-quality ferrite technology is still immature. There are many types of permanent ferrite, and the shape and size of magnets are different. Users have different requirements for product quality, which brings difficulties to large-scale production.
The existing production process of permanent magnet ferrite calcined material still has certain deficiencies, and the stability of product performance is not high, which directly affects the stability of products in the downstream supply chain
[0003] In the prior art, the following problems exist in the production of permanent magnet ferrite calcined materials: when the mixture of iron red and strontium carbonate is mixed and ground in the stirring tower, the calcined materials obtained by the same batch of products at the same calcined temperature are stable. Low reliability, affecting subsequent production

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
  • Production method of pre-sintered material of permanent magnetic ferrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A production method of permanent magnet ferrite calcined material comprises the following steps: Step 1: mixing permanent magnet ferrite raw material iron red and mixed filler, adding calcium titanate and mixing it into mixed powder; said mixed filler is made of porous carbonized A mixed filler formed by mixing silicon and strontium carbonate at a weight ratio of 1:2. In the step 1, the iron red raw material is 70 parts by weight, the mixed filler is 10 parts, and calcium titanate is 3 parts.

[0019] Step 2. Perform wet ball milling on the mixed powder: steel balls: water according to the mass ratio of 0.8:1.3:11. The wet ball milling time is 5 hours, and the particle size of the obtained slurry is 0.80 μm;

[0020] Step 3: press filter and dehydrate the slurry, control the water content of the slurry to 35%, and then undergo microwave pre-calcination under oxygen-enriched conditions to generate permanent magnet ferrite pre-fired material; microwave pre-calcination incl...

Embodiment 2

[0022] A production method of permanent magnet ferrite calcined material comprises the following steps: Step 1: mixing permanent magnet ferrite raw material iron red and mixed filler, adding calcium titanate and mixing it into mixed powder; said mixed filler is made of porous carbonized A mixed filler formed by mixing silicon and strontium carbonate at a weight ratio of 1:2. In the step 1, the iron red raw material is 80 parts by weight, the mixed filler is 15 parts, and calcium titanate is 5 parts.

[0023] Step 2. Perform wet ball milling on the mixed powder: steel balls: water according to the mass ratio of 1:1.6:15. The wet ball milling time is 6 hours, and the particle size of the obtained slurry is 0.90 μm;

[0024] Step 3: press filter and dehydrate the slurry, control the water content of the slurry to 40%, and then undergo microwave pre-calcination under oxygen-enriched conditions to generate permanent magnet ferrite pre-fired material; microwave pre-calcination includ...

Embodiment 3

[0026] A production method of permanent magnet ferrite calcined material comprises the following steps: Step 1: mixing permanent magnet ferrite raw material iron red and mixed filler, adding calcium titanate and mixing it into mixed powder; said mixed filler is made of porous carbonized A mixed filler formed by mixing silicon and strontium carbonate at a weight ratio of 1:2. In the step 1, the iron red raw material is 75 parts by weight, the mixed filler is 12 parts, and calcium titanate is 5 parts.

[0027] Step 2. Perform wet ball milling on the mixed powder: steel ball: water according to the mass ratio of 1:1.5::12, the wet ball milling time is 5.5 hours, and the particle size of the obtained slurry is 0.90 μm;

[0028] Step 3: press filter and dehydrate the slurry, control the water content of the slurry to 38%, and then undergo microwave pre-calcination under oxygen-enriched conditions to generate permanent magnet ferrite pre-fired material; microwave pre-calcination incl...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a production method of a pre-sintered material of permanent magnetic ferrite. The production method specifically comprises the following steps: step 1, mixing a raw permanent magnetic ferrite material, namely iron red and a mixed filler, adding calcium titanate, and conducting mixing to obtain mixed powder; step 2, carrying out wet ball milling on the mixed powder, steel balls and water, wherein wet ball milling time is 5-6 hours; and step 3, carrying out filter pressing dehydration on the slurry, controlling the water content of the slurry to be 35-40%, and then carrying out microwave pre-sintering under an oxygen-enriched condition to generate the pre-sintered material of permanent magnetic ferrite. The pre-sintered material of permanent magnetic ferrite is prepared by adopting microwave pre-sintering which comprises primary pre-sintering and secondary pre-sintering, so all the components in a material body react completely, and the performance of the pre-sintered material is favorably improved; and the added mixed filler is composed of porous silicon carbide and strontium carbonate, so the specific surface area of the silicon carbide is increased during sintering, the adsorption performance of the silicon carbide is improved, the silicon carbide is tightly combined with other fillers, and the comprehensive performance of the permanent magnetic ferrite is enhanced.

Description

technical field [0001] The invention belongs to permanent magnet ferrite pre-sintered material, in particular to a production method of permanent magnet ferrite pre-sintered material. Background technique [0002] Since the mass production of permanent ferrite in the 1950s, the process has become more mature and its performance has been significantly improved. However, the large-scale and stable production of high-end, high-quality ferrite technology is still immature. There are many types of permanent ferrite, and the shapes and sizes of magnets vary. Users have different requirements for product quality, which brings difficulties to large-scale production. The production process of permanent magnet ferrite calcined material in the prior art still has certain deficiencies, and the product performance stability is not high, which directly affects the product stability of the downstream supply chain. [0003] In the prior art, the following problems exist in the production o...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626H01F1/10H01F41/00
CPCC04B35/2683C04B35/62605C04B35/62645H01F1/10H01F41/00C04B2235/3208C04B2235/3236C04B2235/3213C04B2235/3826
Inventor 曹海荣管群林家深
Owner 江苏启诚磁业有限公司