CN102173768B - Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite - Google Patents
Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite Download PDFInfo
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- CN102173768B CN102173768B CN201110023993.0A CN201110023993A CN102173768B CN 102173768 B CN102173768 B CN 102173768B CN 201110023993 A CN201110023993 A CN 201110023993A CN 102173768 B CN102173768 B CN 102173768B
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- camphor
- magnetic
- calcium stearate
- prepared
- solution
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- 238000003825 pressing Methods 0.000 title claims abstract description 23
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 5
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 claims abstract description 36
- 241000723346 Cinnamomum camphora Species 0.000 claims abstract description 36
- 229960000846 camphor Drugs 0.000 claims abstract description 36
- 229930008380 camphor Natural products 0.000 claims abstract description 36
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 20
- 239000008116 calcium stearate Substances 0.000 claims abstract description 20
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 20
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 5
- 230000001476 alcoholic effect Effects 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 5
- 230000005389 magnetism Effects 0.000 abstract description 10
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract 2
- 239000006247 magnetic powder Substances 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 230000008961 swelling Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000019751 broiler diet Nutrition 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000037213 diet Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention provides a preparation method of a high-performance radially isotropic dry pressing permanent magnetic ferrite. The method comprises the following steps: 1) preparing raw materials: selecting ultrafine magnetic powder as a main material as well as H3BO3, calcium stearate, camphor and alcohol solution as additives, preparing camphor and alcohol into a camphor solution at a ratio of 1:1.2, and adding the camphor solution, the calcium stearate and the H3BO3 into the magnetic powder evenly; 2) grinding and swelling the material prepared in the step 1); 3) pressing the material prepared in the step 2) to obtain a blank; 4) sintering the blank prepared in the step 3) at 1120-1180 DEG C; and 5) cleaning and polishing the product prepared in the step 4) to prepare the finished product. The residual magnetism Br of the permanent magnetic ferrite prepared by the method is 390+/-5mT, the coercivity Hcb is 235+/-5KA/m, the intrinsic coercivity Hcj is 240+/-5KA/m, and the magnetic energy product (BH) is 27+/-2KJ/m<3>; and the permanent magnetic ferrite has very high magnetic property and can be used for preparing pump bodies with higher requirements such as a permanent magnet synchronous motor and the like.
Description
Technical field
The present invention relates to the radially manufacture method of isotropic dry pressing permanent-magnet ferrite of a kind of high-performance.
Background technology
The moulding process of permanent-magnet ferrite mainly contains two kinds of dry-pressing and wet pressings, wherein the properties of product of Wet-pressing molding are generally higher than dry-pressing formed product, but the shaping speed of product is slow, qualification rate is low, the dry-pressing formed production advantage will be higher than Wet-pressing molding, shaping speed is fast, qualification rate is high, is convenient to production small size and complex-shaped product.
At present, the magnetic property of dry-pressing product is generally not high, and general good dry-pressing material remanent magnetism is at 360-370mT, and HCJ is at 220KA/m-240KA/m.Dry-pressing product is mainly used in toy motor, and added value of product is not high, is not suitable for the pump housing class permanent-magnet synchronous small machine of having relatively high expectations.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, the radially manufacture method of isotropic dry pressing permanent-magnet ferrite of a kind of high-performance is provided.
High-performance of the present invention is the manufacture method of isotropic dry pressing permanent-magnet ferrite radially, comprises the following steps:
1) raw material is prepared: taking thin magnetic as major ingredient, and select H
3bO
3, calcium stearate, camphor and alcoholic solution be as additive; Camphor and alcohol are made to camphor solution according to 1:1.2, by camphor solution, calcium stearate and H
3bO
3evenly add in magnetic;
2) material making in step 1) is pulverized expanded;
3) by step 2) in the material that makes be pressed into blank;
4) blank making in step 3) is carried out to sintering, sintering temperature is 1120-1180 DEG C;
5) product making in step 4) is cleaned to polishing, make finished product.
Preferably, in said magnetic, the addition of camphor solution is 1.2～3.0wt%, and the addition of calcium stearate is 2～3.8wt%, H
3bO
3addition be 0.3～0.65wt%.
In dry-pressing permanent-magnet ferrite preparation method, conventionally select camphor as adhesive, calcium stearate is as lubricant, directly camphor is added to magnetic, magnetic is difficult to even dispersion in magnetic, product after sintering can produce many pores, in the present invention, camphor and alcohol are mixed and made into camphor solution according to 1:1.2, add magnetic, solve the problem of pore, and the addition of camphor solution is larger on the impact of product remanent magnetism, in the time that the addition of camphor solution in magnetic is 1.2～3.0wt%, product remanent magnetism is higher.
In dry-pressing permanent-magnet ferrite preparation method, conventionally select camphor as lubricant, remanent magnetism and the coercive force of calcium stearate to product is of great impact, along with the increasing of addition, remanent magnetism is dull increase almost, HCJ can dullly decline, and in magnetic, the broiler diets of calcium stearate is 2～3.8wt%.
In dry-pressing permanent-magnet ferrite preparation method, H
3bO
3effect be in sintering process, to be decomposed into B
2o
3, form vitreum, contribute to sintering to carry out, disperse is simultaneously in permanent-magnet ferrite, weaken the movement of crystal boundary in sintering process, thereby controlled crystallite dimension, improved the coercive force of magnet, but excessive interpolation can be introduced too much nonmagnetics and sanction, and can reduce remanent magnetism, affects magnetic property.When sintering temperature is in magnetic 1120-1180 DEG C time, H
3bO
3broiler diets be 0.3～0.65wt%.
The permanent-magnet ferrite that utilizes method of the present invention to make, its remanent magnetism Br is 390 ± 5mT, and coercivity H b is 235KA/m ± 5KA/m, and HCJ Hcj is 240KA/m ± 5KA/m, and magnetic energy product (BH) is 27 ± 2KJ/m
3, there is very high magnetic property, can be used in and manufacture the pump housing that permagnetic synchronous motor etc. is had relatively high expectations.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
embodiment 1
In the present embodiment, the radially manufacture method of isotropic dry pressing permanent-magnet ferrite of high-performance, comprises the following steps:
1) raw material is prepared: taking thin magnetic as major ingredient, and select H
3bO
3, calcium stearate, camphor and alcoholic solution be as additive; Camphor and alcohol are made to camphor solution according to 1:1.2, by camphor solution, calcium stearate and H
3bO
3evenly add in magnetic, in magnetic, the addition of camphor solution is 1.2wt%, and the addition of calcium stearate is 2wt%, H
3bO
3addition be 0.3wt%;
2) material making in step 1) is pulverized expanded;
3) by step 2) in the material that makes be pressed into blank;
4) blank making in step 3) is carried out to sintering, sintering temperature is 1120-1180 DEG C; 5) product making in step 4) is cleaned to polishing, make finished product.
embodiment 2
In the present embodiment, the radially manufacture method of isotropic dry pressing permanent-magnet ferrite of high-performance, comprises the following steps:
1) raw material is prepared: taking thin magnetic as major ingredient, and select H
3bO
3, calcium stearate, camphor and alcoholic solution be as additive; Camphor and alcohol are made to camphor solution according to 1:1.2, by camphor solution, calcium stearate and H
3bO
3evenly add in magnetic, in magnetic, the addition of camphor solution is 2.2wt%, and the addition of calcium stearate is 3.0wt%, H
3bO
3addition be 0.45wt%;
2) material making in step 1) is pulverized expanded;
3) by step 2) in the material that makes be pressed into blank;
4) blank making in step 3) is carried out to sintering, sintering temperature is 1120-1180 DEG C;
5) product making in step 4) is cleaned to polishing, make finished product.
embodiment 3
In the present embodiment, the radially manufacture method of isotropic dry pressing permanent-magnet ferrite of high-performance, comprises the following steps:
1) raw material is prepared: taking thin magnetic as major ingredient, and select H
3bO
3, calcium stearate, camphor and alcoholic solution be as additive; Camphor and alcohol are made to camphor solution according to 1:1.2, by camphor solution, calcium stearate and H
3bO
3evenly add in magnetic, in magnetic, the addition of camphor solution is 3.0wt%, and the addition of calcium stearate is 3.8wt%, H
3bO
3addition be 0.65wt%;
2) material making in step 1) is pulverized expanded;
3) by step 2) in the material that makes be pressed into blank;
4) blank making in step 3) is carried out to sintering, sintering temperature is 1120-1180 DEG C;
5) product making in step 4) is cleaned to polishing, make finished product.
embodiment 4
The permanent-magnet ferrite that embodiment 1-3 is made detects with MATS-2010H permanent magnetism tester, the finished product magnetic property that discovery is made is as follows: remanent magnetism Br is 390 ± 5mT, coercivity H b is 235KA/m ± 5KA/m, and HCJ Hcj is 240KA/m ± 5KA/m, and magnetic energy product (BH) is 27 ± 2KJ/m
3, reach the magnetic property level of pressed Anisotropic permanent-magnet ferrite, can be used in and manufacture the pump housing that permagnetic synchronous motor etc. is had relatively high expectations.
Claims (1)
1. the radially manufacture method of isotropic dry pressing permanent-magnet ferrite of high-performance, is characterized in that, comprises the following steps:
1) raw material is prepared: taking thin magnetic as major ingredient, and select H
3bO
3, calcium stearate, camphor and alcoholic solution be as additive; Camphor and alcohol are made to camphor solution according to 1:1.2, by camphor solution, calcium stearate and H
3bO
3evenly add in magnetic;
2) material making in step 1) is pulverized expanded;
3) by step 2) in the material that makes be pressed into blank;
4) blank making in step 3) is carried out to sintering, sintering temperature is 1120-1180 DEG C;
5) product making in step 4) is cleaned to polishing, make finished product;
Wherein, in magnetic, the addition of camphor solution is 2.2wt%, and the addition of calcium stearate is 3.0wt%, H
3bO
3addition be 0.45wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110023993.0A CN102173768B (en) | 2011-01-21 | 2011-01-21 | Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110023993.0A CN102173768B (en) | 2011-01-21 | 2011-01-21 | Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102173768A CN102173768A (en) | 2011-09-07 |
| CN102173768B true CN102173768B (en) | 2014-07-02 |
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ID=44517066
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| CN201110023993.0A Active CN102173768B (en) | 2011-01-21 | 2011-01-21 | Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843002B (en) * | 2012-09-24 | 2015-10-28 | 徐州通用高新磁电有限公司 | A kind of manufacture method of permanent magnet machine rotor |
| CN102976767B (en) * | 2012-12-17 | 2014-08-06 | 南通万宝实业有限公司 | Method for selecting dry-pressed strontium permanent ferrite binding agent without loss of coercive force |
| CN104496458A (en) * | 2014-09-22 | 2015-04-08 | 横店集团东磁股份有限公司 | Manufacturing method of dry-pressed anisotropic ferrite magnetic powder |
| CN105693228A (en) * | 2016-02-04 | 2016-06-22 | 海安县巨力磁材有限责任公司 | Preparation method of high-performance radial-anisotropy dry-pressing permanent magnetic ferrite |
| CN107200569A (en) * | 2017-04-11 | 2017-09-26 | 江门市中磁机电有限公司 | A kind of high-performance dry-pressing permanent-magnet ferrite rotor and its manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101599333B (en) * | 2009-04-28 | 2011-09-07 | 横店集团东磁股份有限公司 | Method for manufacturing anisotropic multi-pole magnetic ring through dry-press forming |
| CN101752075A (en) * | 2010-02-20 | 2010-06-23 | 南通万宝磁石制造有限公司 | Experimental method for determining use and addition amount of dry Sr ferrite magnetic steel adhesive agents |
| CN101870579A (en) * | 2010-06-10 | 2010-10-27 | 上海应用技术学院 | A kind of permanent magnet strontium ferrite material and preparation method thereof |
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Inventor after: Cao Jianjun Inventor after: Wang Zhaoyu Inventor after: Ding Xi Inventor before: Cao Jianjun |
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Free format text: CORRECT: INVENTOR; FROM: CAO JIANJUN TO: CAO JIANJUN WANG ZHAOYU DING XI |