CN105174929A - Permanent magnetic ferrite for automobile motor and manufacturing method of permanent magnetic ferrite - Google Patents
Permanent magnetic ferrite for automobile motor and manufacturing method of permanent magnetic ferrite Download PDFInfo
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- CN105174929A CN105174929A CN201510582938.3A CN201510582938A CN105174929A CN 105174929 A CN105174929 A CN 105174929A CN 201510582938 A CN201510582938 A CN 201510582938A CN 105174929 A CN105174929 A CN 105174929A
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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
The present invention relates to technical field of automobile, specifically a kind of electric motor of automobile permanent-magnet ferrite and manufacture method thereof.
Background technology
Since reform and opening-up, along with China's entry into the World Trade Organization, automobile industry obtains fast development in China, foreign joint, solely state-owned and Private automobile enterprise arises at the historic moment, within 2010, China's automobile volume of production and marketing is more than 1,500 ten thousand, estimates that China's automobile coming years volume of production and marketing year amplification will remain between 15-20%.
Permanent-magnet ferrite is the important materials manufacturing automobile each several part motor, and along with the fast development of auto manufacturing technology, automobile various functions gradual perfection, automobile more becomes automatization, and every platform automobile needs to use permanent-magnet ferrite material to be about 5-5.5kg.Between past 5 years, China Automobile Industry permanent-magnet ferrite material increases to 8.4 ten thousand tons in 2010 from 2006 3.6 ten thousand tons, increases 2.3 times, estimates that the year amplification of the automobile permanent-magnet ferrite material coming years also will remain between 15-20%.
Permanent-magnet ferrite is also known as hard ferrite, and it is a kind of permanent magnet material that Current production is maximum, the same with other permanent magnet products, only needs outside to provide the energy that once magnetizes just can produce constant magnetic field.Since this material comes out, technology just improves constantly range of product constantly increases, and manufacturing process is constantly improved, and range of application constantly expands, so Social benefit and economic benefit constantly increases.At present, the forming method of anisotropy sintered permanent ferrite mainly can be divided into wet moulding and dry-press process two kinds.In wet moulding, owing to there being the existence of the dispersion medium such as water or ethanol, therefore ferrite particle is easy to rotate, ferrite particle is easy to arrange along easy magnetization axis in magnetic field, this can make shaping ferrite obtain higher orientation degree, and therefore the ferrite of wet moulding can obtain higher magnetic property.But wet moulding needs to be discharged to outside die cavity by dispersion medium in extrusion forming process, and therefore productivity is lower; In addition, the requirement of wet moulding to production unit is higher, and production cost is also higher.In existing dry-press process, dry ferrite powder is directly filled in die cavity, then extrusion forming in magnetic field.Compared with wet moulding, owing to there is no dispersion medium, therefore the friction of ferrite paricles intergranular sharply increases, and there is inevitable adhesion in ferrite particle in drying course, the degree causing ferrite particle to arrange along easy magnetization axis obviously reduces, this can make shaping ferritic orientation degree reduce, and the magnetic property that therefore in prior art, the ferrite of dry-press process obtains is poor.But it is fast that dry-press process has shaping speed, the advantages such as production efficiency is high, and molding device is simple.
Summary of the invention
The electric motor of automobile permanent-magnet ferrite that the object of the present invention is to provide a kind of cost low, easy to operate and manufacture method thereof, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 100-120 part, barium carbonate 4-8 part, Strontium carbonate powder 3-5 part, silicon-dioxide 2-4 part, polyvinyl alcohol 1-3 part, aluminum oxide 0.8-1.2 part, cobalt oxide 0.5-1 part, lanthanum trioxide 0.5-1 part, calglucon 0.4-0.8 part, boric acid 0.2-0.5 part.
As the present invention's further scheme: described electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 110 parts, barium carbonate 6 parts, Strontium carbonate powder 4 parts, silicon-dioxide 3 parts, polyvinyl alcohol 2 parts, 1 part, aluminum oxide, cobalt oxide 0.7 part, lanthanum trioxide 0.7 part, calglucon 0.6 part, boric acid 0.35 part.
The manufacture method of described electric motor of automobile permanent-magnet ferrite, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 4-6h, the rotating speed of ball mill is 60-80r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1200-1400 DEG C, insulation 2.5-3.5h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 20-25mm, get the Preburning material of 30-40% and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and boric acid to be added in ball mill and to carry out secondary ball milling, after ball milling, the median size of particle is 1-1.5 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2-2.5 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 850-1050 DEG C, insulation 40-60min, moisture control is at 4-6%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 7-9MPa, sinter shaping ferrite, sintering temperature is 1300-1400 DEG C, sintering 1.5-2h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
Compared with prior art, the invention has the beneficial effects as follows:
Present invention process is simple, easy to operate, manufactures the abundant raw material source of permanent-magnet ferrite, cost is low, and the product cost of permanent-magnet ferrite is good, has good magnetic behavior, there is higher residual magnetic flux density and good HCJ, operability and practical.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Embodiment 1
A kind of electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 100 parts, barium carbonate 4 parts, Strontium carbonate powder 3 parts, silicon-dioxide 2 parts, polyvinyl alcohol 1 part, 0.8 part, aluminum oxide, cobalt oxide 0.5 part, lanthanum trioxide 0.5 part, calglucon 0.4 part, boric acid 0.2 part.
The manufacture method of described electric motor of automobile permanent-magnet ferrite, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 4h, the rotating speed of ball mill is 60r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1200 DEG C, insulation 2.5h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 20mm, Preburning material and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and the boric acid of getting 30% are added in ball mill and carry out secondary ball milling, after ball milling, the median size of particle is 1 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 850 DEG C, insulation 40min, moisture control is 4%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 7MPa, sinter shaping ferrite, sintering temperature is 1300 DEG C, sintering 1.5h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
Embodiment 2
A kind of electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 105 parts, barium carbonate 5 parts, Strontium carbonate powder 3.5 parts, silicon-dioxide 2.5 parts, polyvinyl alcohol 1.5 parts, 0.9 part, aluminum oxide, cobalt oxide 0.6 part, lanthanum trioxide 0.6 part, calglucon 0.5 part, boric acid 0.3 part.
The manufacture method of described electric motor of automobile permanent-magnet ferrite, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 4.5h, the rotating speed of ball mill is 65r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1250 DEG C, insulation 2.8h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 21mm, Preburning material and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and the boric acid of getting 32% are added in ball mill and carry out secondary ball milling, after ball milling, the median size of particle is 1.1 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2.1 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 900 DEG C, insulation 45min, moisture control is 4.5%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 7.5MPa, sinter shaping ferrite, sintering temperature is 1320 DEG C, sintering 1.6h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
Embodiment 3
A kind of electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 110 parts, barium carbonate 6 parts, Strontium carbonate powder 4 parts, silicon-dioxide 3 parts, polyvinyl alcohol 2 parts, 1 part, aluminum oxide, cobalt oxide 0.7 part, lanthanum trioxide 0.7 part, calglucon 0.6 part, boric acid 0.35 part.
The manufacture method of described electric motor of automobile permanent-magnet ferrite, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 5h, the rotating speed of ball mill is 70r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1300 DEG C, insulation 3h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 22mm, Preburning material and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and the boric acid of getting 35% are added in ball mill and carry out secondary ball milling, after ball milling, the median size of particle is 1.2 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2.2 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 950 DEG C, insulation 50min, moisture control is 5%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 8MPa, sinter shaping ferrite, sintering temperature is 1350 DEG C, sintering 1.7h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
Embodiment 4
A kind of electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 115 parts, barium carbonate 7 parts, Strontium carbonate powder 4.5 parts, silicon-dioxide 3.5 parts, polyvinyl alcohol 2.5 parts, 1.1 parts, aluminum oxide, cobalt oxide 0.8 part, lanthanum trioxide 0.8 part, calglucon 0.7 part, boric acid 0.4 part.
The manufacture method of described electric motor of automobile permanent-magnet ferrite, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 5.5h, the rotating speed of ball mill is 75r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1350 DEG C, insulation 3.2h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 24mm, Preburning material and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and the boric acid of getting 38% are added in ball mill and carry out secondary ball milling, after ball milling, the median size of particle is 1.4 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2.4 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 1000 DEG C, insulation 55min, moisture control is 5.5%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 8.5MPa, sinter shaping ferrite, sintering temperature is 1380 DEG C, sintering 1.8h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
Embodiment 5
A kind of electric motor of automobile permanent-magnet ferrite, comprises according to the raw material of weight part: Iron concentrate 120 parts, barium carbonate 8 parts, Strontium carbonate powder 5 parts, silicon-dioxide 4 parts, polyvinyl alcohol 3 parts, 1.2 parts, aluminum oxide, cobalt oxide 1 part, lanthanum trioxide 1 part, calglucon 0.8 part, boric acid 0.5 part.
The manufacture method of described electric motor of automobile permanent-magnet ferrite, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 6h, the rotating speed of ball mill is 80r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1400 DEG C, insulation 3.5h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 25mm, Preburning material and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and the boric acid of getting 40% are added in ball mill and carry out secondary ball milling, after ball milling, the median size of particle is 1.5 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2.5 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 1050 DEG C, insulation 60min, moisture control is 6%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 9MPa, sinter shaping ferrite, sintering temperature is 1400 DEG C, sintering 2h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
Present invention process is simple, easy to operate, manufactures the abundant raw material source of permanent-magnet ferrite, cost is low, and the product cost of permanent-magnet ferrite is good, has good magnetic behavior, there is higher residual magnetic flux density and good HCJ, operability and practical.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (3)
1. an electric motor of automobile permanent-magnet ferrite, it is characterized in that, comprise according to the raw material of weight part: Iron concentrate 100-120 part, barium carbonate 4-8 part, Strontium carbonate powder 3-5 part, silicon-dioxide 2-4 part, polyvinyl alcohol 1-3 part, aluminum oxide 0.8-1.2 part, cobalt oxide 0.5-1 part, lanthanum trioxide 0.5-1 part, calglucon 0.4-0.8 part, boric acid 0.2-0.5 part.
2. electric motor of automobile permanent-magnet ferrite according to claim 1, it is characterized in that, comprise according to the raw material of weight part: Iron concentrate 110 parts, barium carbonate 6 parts, Strontium carbonate powder 4 parts, silicon-dioxide 3 parts, polyvinyl alcohol 2 parts, 1 part, aluminum oxide, cobalt oxide 0.7 part, lanthanum trioxide 0.7 part, calglucon 0.6 part, boric acid 0.35 part.
3. a manufacture method for the electric motor of automobile permanent-magnet ferrite as described in as arbitrary in claim 1-2, it is characterized in that, concrete steps are as follows:
(1) each raw material is taken according to weight part;
(2) Iron concentrate, barium carbonate and Strontium carbonate powder are placed in stirrer to stir, then are placed in ball mill ball milling 4-6h, the rotating speed of ball mill is 60-80r/min;
(3) deliver in kiln with dehvery pump after being dried by the material mixed after ball milling and carry out pre-burning, sintering temperature is 1200-1400 DEG C, insulation 2.5-3.5h;
(4) above-mentioned Preburning material is added in jaw crusher carries out fragmentation, after broken, particle diameter is 20-25mm, get the Preburning material of 30-40% and silicon-dioxide, aluminum oxide, cobalt oxide, lanthanum trioxide and boric acid to be added in ball mill and to carry out secondary ball milling, after ball milling, the median size of particle is 1-1.5 μm, again remaining Preburning material is also carried out secondary ball milling, after ball milling, the median size of particle is 2-2.5 μm, then two portions material and calglucon is mixed and mix;
(5) powder after fine grinding in above-mentioned steps (4) is added clear water washing several times, be added in drying kiln after washing and bake dry powder, then sent in kiln and carry out anneal, temperature controls at 850-1050 DEG C, insulation 40-60min, moisture control is at 4-6%;
(6) powder above-mentioned steps (5) obtained and polyvinyl alcohol mix evenly, and it is dry-pressing formed to be placed in magnetic field, and magnetic field size is 80000e, forming pressure is 7-9MPa, sinter shaping ferrite, sintering temperature is 1300-1400 DEG C, sintering 1.5-2h;
(7) electric motor of automobile permanent-magnet ferrite finished product is obtained after the blank that above-mentioned steps (6) obtains being carried out ground.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098286A (en) * | 2016-05-30 | 2016-11-09 | 南通万宝实业有限公司 | A kind of alternating current generator complex ferrite material and preparation method thereof |
| CN107337448A (en) * | 2017-07-14 | 2017-11-10 | 海安县巨力磁材有限责任公司 | A kind of production method of permanent-magnet ferrite |
| CN112898006A (en) * | 2021-03-22 | 2021-06-04 | 江苏启诚磁业有限公司 | Preparation process of permanent magnetic ferrite ball milling mixing material |
| CN116621572A (en) * | 2023-04-04 | 2023-08-22 | 宜宾四川大学产业技术研究院 | Preparation method of economic composite permanent magnetic ferrite |
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| CN102898144A (en) * | 2012-09-25 | 2013-01-30 | 绵阳市东辰磁性材料有限公司 | Method for manufacturing high-performance permanent magnetic ferrites for automobile motors |
| CN104844185A (en) * | 2015-04-29 | 2015-08-19 | 安徽中磁高科有限公司 | Low-cost sintered permanent magnetic ferrite material and preparation method thereof |
| CN104844187A (en) * | 2015-04-29 | 2015-08-19 | 安徽中磁高科有限公司 | Permanent magnetic ferrite material containing rare earth and preparation method thereof |
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Patent Citations (3)
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| CN102898144A (en) * | 2012-09-25 | 2013-01-30 | 绵阳市东辰磁性材料有限公司 | Method for manufacturing high-performance permanent magnetic ferrites for automobile motors |
| CN104844185A (en) * | 2015-04-29 | 2015-08-19 | 安徽中磁高科有限公司 | Low-cost sintered permanent magnetic ferrite material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098286A (en) * | 2016-05-30 | 2016-11-09 | 南通万宝实业有限公司 | A kind of alternating current generator complex ferrite material and preparation method thereof |
| CN107337448A (en) * | 2017-07-14 | 2017-11-10 | 海安县巨力磁材有限责任公司 | A kind of production method of permanent-magnet ferrite |
| CN112898006A (en) * | 2021-03-22 | 2021-06-04 | 江苏启诚磁业有限公司 | Preparation process of permanent magnetic ferrite ball milling mixing material |
| CN116621572A (en) * | 2023-04-04 | 2023-08-22 | 宜宾四川大学产业技术研究院 | Preparation method of economic composite permanent magnetic ferrite |
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