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Permanent magnetic ferrite for automobile motor and manufacturing method of permanent magnetic ferrite

A permanent magnet ferrite and automobile technology, applied in the field of auto parts, can solve the problems of reduced ferrite orientation, reduced degree of arrangement, poor magnetic properties, etc., and achieves high residual magnetic induction intensity, low cost, and good product performance-to-price ratio. Effect

Inactive Publication Date: 2015-12-23
CHONGQING TONGSAI ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with wet molding, since there is no dispersion medium, the friction between ferrite particles increases sharply, and the inevitable adhesion of ferrite particles occurs during the drying process, resulting in the arrangement of ferrite particles along the direction of easy magnetization The degree of the ferrite is significantly reduced, which will reduce the orientation degree of the formed ferrite, so the magnetic properties obtained by the dry formed ferrite in the prior art are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A permanent magnet ferrite for automobile motors, the raw materials according to parts by weight include: 100 parts of fine iron powder, 4 parts of barium carbonate, 3 parts of strontium carbonate, 2 parts of silicon dioxide, 1 part of polyvinyl alcohol, 0.8 parts of aluminum oxide, 0.5 parts of cobalt oxide, 0.5 parts of lanthanum oxide, 0.4 parts of calcium gluconate, and 0.2 parts of boric acid.

[0022] The manufacture method of permanent magnet ferrite for described automobile motor, concrete steps are as follows:

[0023] (1) take each raw material according to parts by weight;

[0024] (2) Place the iron concentrate powder, barium carbonate and strontium carbonate in a mixer to fully stir them evenly, then place them in a ball mill for 4 hours, and the rotating speed of the ball mill is 60r / min;

[0025] (3) The uniformly mixed material after ball milling is dried and then sent to the kiln for pre-sintering with a feeding pump. The sintering temperature is 1200°...

Embodiment 2

[0031] A kind of permanent magnet ferrite for automobile motor, the raw material according to weight part comprises: 105 parts of fine iron powder, 5 parts of barium carbonate, 3.5 parts of strontium carbonate, 2.5 parts of silicon dioxide, 1.5 parts of polyvinyl alcohol, 0.9 part of aluminum oxide, 0.6 parts of cobalt oxide, 0.6 parts of lanthanum oxide, 0.5 parts of calcium gluconate, and 0.3 parts of boric acid.

[0032] The manufacture method of permanent magnet ferrite for described automobile motor, concrete steps are as follows:

[0033] (1) take each raw material according to parts by weight;

[0034] (2) Place the iron powder, barium carbonate and strontium carbonate in a mixer to fully stir them evenly, then place them in a ball mill for 4.5 hours, and the rotating speed of the ball mill is 65r / min;

[0035] (3) The uniformly mixed material after ball milling is dried and then sent to the kiln for pre-sintering with a material conveying pump. The sintering temperatu...

Embodiment 3

[0041] A kind of permanent magnet ferrite for automobile motor, the raw material according to weight part comprises: 110 parts of fine iron powder, 6 parts of barium carbonate, 4 parts of strontium carbonate, 3 parts of silicon dioxide, 2 parts of polyvinyl alcohol, 1 part of aluminum oxide, 0.7 parts of cobalt oxide, 0.7 parts of lanthanum oxide, 0.6 parts of calcium gluconate, and 0.35 parts of boric acid.

[0042] The manufacture method of permanent magnet ferrite for described automobile motor, concrete steps are as follows:

[0043] (1) take each raw material according to parts by weight;

[0044] (2) Put the iron concentrate powder, barium carbonate and strontium carbonate in a mixer to fully stir them evenly, then place them in a ball mill for 5 hours, and the rotating speed of the ball mill is 70r / min;

[0045] (3) The uniformly mixed material after ball milling is dried and sent to the kiln for pre-sintering with a material delivery pump. The sintering temperature is...

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Abstract

The invention discloses a permanent magnetic ferrite for an automobile motor and a manufacturing method of the permanent magnetic ferrite. The permanent magnetic ferrite for the automobile motor comprises the following raw materials in parts by weight: fine iron powder, barium carbonate, strontium carbonate, silicon dioxide, polyvinyl alcohol, aluminum oxide, cobalt oxide, lanthanum oxide, calcium gluconate and boric acid. When the permanent magnetic ferrite is manufactured, the fine iron powder prepared by using an iron sand resource is used as a preparation raw material, so that the production cost is reduced; and the powder is firstly subjected to coarse grinding and fine grinding treatment, so that the prepared powder is uniform in particle size distribution and low in crystal grain damage degree. The manufacturing method is simple in process and convenient to operate; and the manufactured permanent magnetic ferrite is rich in raw material source, low in cost, good in product cost performance, favorable in magnetic property, relatively high in residual magnetic flux density, relatively good in intrinsic coercivity and high in operability and practicability.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a permanent magnet ferrite for an auto motor and a manufacturing method thereof. Background technique [0002] Since the reform and opening up, with my country's accession to the WTO, the automobile manufacturing industry has developed rapidly in my country, and foreign joint ventures, state-owned and private automobile companies have emerged. In 2010, my country's automobile production and sales have exceeded 15 million. It is expected that my country will The annual growth rate of automobile production and sales will remain between 15-20%. [0003] Permanent magnet ferrite is an important material for manufacturing motors of various parts of automobiles. With the rapid development of automobile manufacturing technology, various functions of automobiles are gradually improved, and automobiles are becoming more automated. Each car needs to use about 5-5.5kg of permanent magnet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 傅强陈明菊
Owner CHONGQING TONGSAI ELECTROMECHANICAL
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