CN105693228A - Preparation method of high-performance radial-anisotropy dry-pressing permanent magnetic ferrite - Google Patents
Preparation method of high-performance radial-anisotropy dry-pressing permanent magnetic ferrite Download PDFInfo
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- CN105693228A CN105693228A CN201610076359.6A CN201610076359A CN105693228A CN 105693228 A CN105693228 A CN 105693228A CN 201610076359 A CN201610076359 A CN 201610076359A CN 105693228 A CN105693228 A CN 105693228A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
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Abstract
The invention provides a preparation method of high-performance radial-anisotropy dry-pressing permanent magnetic ferrite. The preparation method comprises the following steps: 1) mixing and pelletization: by using fine magnetic powder as a main material and selecting H3BO3, calcium stearate, camphor and an alcohol solution as auxiliary materials, mixing the main material and auxiliary materials, and carrying out rolling pelletization through a pelletizer; 2) sintering the product prepared in the step 1); 3) grinding the product prepared in the step 2); 4) drying the product prepared in the step 3) to prepare powder; 5) carrying out dry-pressing magnetic field forming on the product prepared in the step 4); 6) carrying out second sintering on the product prepared in the step 5); 7) grinding the product prepared in the step 6); 8) cleaning and drying the product prepared in the step 7); and 9) magnetizing the product prepared in the step 8), thereby obtaining the high-performance radial-anisotropy dry-pressing permanent magnetic ferrite. The product prepared by the method has very high magnetic properties, and can be used for manufacturing permanent-magnet synchronous motors.
Description
Technical field
The preparation method that the present invention relates to a kind of high-performance radially isotropic dry pressing permanent-magnet ferrite。
Background technology
The moulding process of permanent-magnet ferrite mainly has dry-pressing and wet pressing two kinds, 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 is higher than Wet-pressing molding, shaping speed is fast, qualification rate is high, it is simple to produce small size and complex-shaped product。
At present, the magnetic property of dry-pressing product is general 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 that requirement is higher。
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art part, it is provided that the preparation method of a kind of high-performance radially isotropic dry pressing permanent-magnet ferrite。
The manufacture method of the high-performance of the present invention radially isotropic dry pressing permanent-magnet ferrite, comprises the following steps:
1) mixed pelletizing: with thin magnetic powder for major ingredient, and select H3BO3, calcium stearate, Camphora and alcoholic solution as adjuvant, roll pelletizing by pelletizer after major ingredient and adjuvant being mixed；
2) product prepared in step 1) is sintered；
3) by step 2) in prepare product be ground；
4) product prepared in step 3) is dried powder process；
5) product prepared in step 4) is carried out drymagnetic shaping；
6) product prepared in step 5) is carried out double sintering；
7) product prepared in step 6) is carried out mill processing；
8) product prepared in step 7) is carried out and dries；
9) product prepared in step 8) is magnetized, obtain high-performance radially isotropic dry pressing permanent-magnet ferrite。
Preferably,
The sintering temperature of described sintering is 1100-1200 DEG C, sintering time 2-3 hour；
The sintering temperature of described double sintering is 1100-1200 DEG C, sintering time 2-3 hour；
Utilize the radial direction isotropic dry pressing permanent-magnet ferrite that the method for the present invention is made, there is significantly high magnetic property, it is possible to require the higher pump housing for manufacturing permagnetic synchronous motor etc.。
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail。
Embodiment 1
The manufacture method of the high-performance of the present invention radially isotropic dry pressing permanent-magnet ferrite, comprises the following steps:
1) mixed pelletizing: with thin magnetic powder for major ingredient, and select H3BO3, calcium stearate, Camphora and alcoholic solution as adjuvant, roll pelletizing by pelletizer after major ingredient and adjuvant being mixed；
2) being sintered by the product prepared in step 1), sintering temperature is 1100-1200 DEG C, sintering time 2-3 hour；
3) by step 2) in prepare product be ground；
4) product prepared in step 3) is dried powder process；
5) product prepared in step 4) is carried out drymagnetic shaping；
6) product prepared in step 5) being carried out double sintering, sintering temperature is 1100-1200 DEG C, sintering time 2-3 hour；
7) product prepared in step 6) is carried out mill processing；
8) product prepared in step 7) is carried out and dries；
9) product prepared in step 8) is magnetized, obtain high-performance radially isotropic dry pressing permanent-magnet ferrite。
Claims (2)
1. the manufacture method of a high-performance radially isotropic dry pressing permanent-magnet ferrite, it is characterised in that comprise the following steps:
1) mixed pelletizing: with thin magnetic powder for major ingredient, and select H3BO3, calcium stearate, Camphora and alcoholic solution as adjuvant, roll pelletizing by pelletizer after major ingredient and adjuvant being mixed；
2) product prepared in step 1) is sintered；
3) by step 2) in prepare product be ground；
4) product prepared in step 3) is dried powder process；
5) product prepared in step 4) is carried out drymagnetic shaping；
6) product prepared in step 5) is carried out double sintering；
7) product prepared in step 6) is carried out mill processing；
8) product prepared in step 7) is carried out and dries；
9) product prepared in step 8) is magnetized, obtain high-performance radially isotropic dry pressing permanent-magnet ferrite。
2. the manufacture method of high-performance according to claim 1 radially isotropic dry pressing permanent-magnet ferrite, it is characterised in that the sintering temperature of described sintering is 1100-1200 DEG C, sintering time 2-3 hour；The sintering temperature of described double sintering is 1100-1200 DEG C, sintering time 2-3 hour。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610076359.6A CN105693228A (en) | 2016-02-04 | 2016-02-04 | Preparation method of high-performance radial-anisotropy dry-pressing permanent magnetic ferrite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610076359.6A CN105693228A (en) | 2016-02-04 | 2016-02-04 | Preparation method of high-performance radial-anisotropy dry-pressing permanent magnetic ferrite |
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| CN105693228A true CN105693228A (en) | 2016-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830093A (en) * | 2017-02-23 | 2017-06-13 | 海安县巨力磁材有限责任公司 | The preparation method of high-performance permanent-magnet ferrite |
| CN106866131A (en) * | 2017-02-23 | 2017-06-20 | 海安县巨力磁材有限责任公司 | A kind of preparation method of high-performance permanent-magnet ferrite |
| CN107344236A (en) * | 2017-06-21 | 2017-11-14 | 徐州明润磁材有限公司 | A kind of manufacture method of miniature motor rotor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070246681A1 (en) * | 2004-03-04 | 2007-10-25 | Tdk Corporation | Ferrite Magnetic Material, Ferrite Sintered Magnet and Method for Producing the Same |
| CN102173768A (en) * | 2011-01-21 | 2011-09-07 | 海安县巨力磁材有限责任公司 | Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite |
| CN103304229A (en) * | 2013-06-14 | 2013-09-18 | 南通飞来福磁铁有限公司 | Process for forming high-orientation dry-press permanent magnetic ferrite |
-
2016
- 2016-02-04 CN CN201610076359.6A patent/CN105693228A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070246681A1 (en) * | 2004-03-04 | 2007-10-25 | Tdk Corporation | Ferrite Magnetic Material, Ferrite Sintered Magnet and Method for Producing the Same |
| CN102173768A (en) * | 2011-01-21 | 2011-09-07 | 海安县巨力磁材有限责任公司 | Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite |
| CN103304229A (en) * | 2013-06-14 | 2013-09-18 | 南通飞来福磁铁有限公司 | Process for forming high-orientation dry-press permanent magnetic ferrite |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830093A (en) * | 2017-02-23 | 2017-06-13 | 海安县巨力磁材有限责任公司 | The preparation method of high-performance permanent-magnet ferrite |
| CN106866131A (en) * | 2017-02-23 | 2017-06-20 | 海安县巨力磁材有限责任公司 | A kind of preparation method of high-performance permanent-magnet ferrite |
| CN107344236A (en) * | 2017-06-21 | 2017-11-14 | 徐州明润磁材有限公司 | A kind of manufacture method of miniature motor rotor |
| CN107344236B (en) * | 2017-06-21 | 2019-06-14 | 徐州明润磁材有限公司 | A kind of manufacturing method of miniature motor rotor |
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Application publication date: 20160622 |