CN102351525A - Manufacture method of permanent magnet ferrite material powder for injection molding - Google Patents
Manufacture method of permanent magnet ferrite material powder for injection molding Download PDFInfo
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- CN102351525A CN102351525A CN2011102027274A CN201110202727A CN102351525A CN 102351525 A CN102351525 A CN 102351525A CN 2011102027274 A CN2011102027274 A CN 2011102027274A CN 201110202727 A CN201110202727 A CN 201110202727A CN 102351525 A CN102351525 A CN 102351525A
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Abstract
The invention discloses a manufacture method of permanent magnet ferrite material powder for injection molding, which comprises the following process steps that: firstly, raw materials consisting of iron oxide, A carbonate, compact agents and firing auxiliary agents are uniformly mixed, wherein A is one kind of materials or a mixture of two kinds of materials from Sr, Ba, Pb and Ca; then, the mixed raw materials are fired by a dry process; next, the fired materials are finely ground; and finally, the heat treatment is carried out. In the manufacture method of the permanent magnet ferrite material powder for injection molding, the compact agents are added, the molding process is not needed, dry powder is mixed for directly firing, in addition, the crushing and/or crude grinding process can be not needed, the fine powder can be obtained through direct water washing and fine grinding, the process is simple, and in addition, the permanent magnet ferrite material powder with ideal crystal particle appearance, good filling performance, strong magnetic force and uniform magnetic force can be obtained.
Description
Technical field
The present invention relates to a kind of bonded permanent ferrite material powder method of manufacture, especially a kind of injection molding permanent ferrite powder method of manufacture.
Background technology
The injection molding permanent-magnet ferrite is a kind of in the four big bonded permanent ferrites; The characteristic that had both had common permanent magnet material; Has the high and easy machining characteristics of injection device precision again; Be widely used in fields such as small and special electric machine, frequency transformer, magnetic roller magnetic drum, sound equipment; Obtained fast development since new millennium; Especially Application Areas has obtained great expansion since the year before last, also the physical strength of magnet, surperficial magnetic force and magnetic force homogeneity has been proposed requirements at the higher level simultaneously.Injection molding is the key foundation material of injection molding permanent-magnet ferrite with permanent ferrite powder, accounts for 90% of its weight ratio, is the crucial determinative of injection molding permanent-magnet ferrite characteristic.
Injection molding permanent ferrite powder, key problem in technology are to control grain morphology, size-grade distribution, filling characteristic and the controlling manufacturing cost of material powder.For this reason, patent documentation 1 (CN 101808943 A) proposes to make in the oxide compound that comprises Zr, Ti, Zn, Co, Mn or Ni in the composition at least a, improves liquidity and can not increase SFD to reach; Patent documentation 2 (CN 101345110 A) proposes to modulate size-grade distribution through granularity physics fractionated method; Patent documentation 3 (the special public clear 63-34610 communique of Japan) proposes micro mist (mean particle size is 0.5-1.5 μ m) and meal (more than the mean particle size 30 μ m) are mixed to reach high fillibility.The inventor is according to the method for propositions such as patent documentation 1-3; Make an experiment repeatedly; Find that the method for propositions such as patent documentation 1-3 can obtain the ferrite material powder of high-compressibility; But the material powder that patent documentation 1 obtains is because of the adding of transition metal oxide, and iHc is difficult to reach the service requirements of small and special electric machine; The material mealiness that patent documentation 2 obtains can occupy medium level, but manufacturing process head, cost are high; The material powder that patent documentation 3 obtains, because size-grade distribution is wide, the injection molding permanent-magnet ferrite magnetic of manufacturing, magnetic force are inhomogeneous.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of injection molding permanent-magnet ferrite powder method of manufacture, and its manufacturing process is simple, low cost of manufacture, and make the permanent-magnet ferrite powder packed property of processing good, magnetic force is high and even.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of injection molding permanent ferrite powder method of manufacture; It is characterized in that comprising following processing step: at first; The raw material uniform mixing that to form by ferriferous oxide, A carbonate, compact agent, adjuvant for combustion; Wherein, A is one or both mixtures among Sr, Ba, Pb and the Ca; Secondly, will mix back raw material dry method fires; Then, will fire the back material levigate; At last, thermal treatment.
Preferably, said compact agent is for for calcium, zinc, the oxide compound of boron or one or more mixtures in the salt, and is more preferred, is one or more mixtures in lime carbonate, zinc oxide, the Sodium Tetraborate.
Preferably, the weight of said compact agent accounts for the 0.05-2% of raw material gross weight.
Preferably, said adjuvant for combustion is strontium chloride or bariumchloride, and the weight of said adjuvant for combustion accounts for the 3-6% of raw material gross weight.
Temperature when preferably, said dry method is fired is 1100-1260 ℃.
Preferably, before the said thermal treatment powder mean particle size be controlled to be 1.0-3.3 μ m, said thermal treatment temp is at 820-1000 ℃.
Preferably, it is characterized in that: saidly levigately divide two grade standards at least, and should be with the powder uniform mixing of several grain size category standards before the thermal treatment.
Preferably; Said levigate two grade standards of dividing at least, wherein, first grade median size is 0.5-1.0 μ m; Second grade median size is 1.3-4.5 μ m, the median size of the 3rd or other grade standard should be between between first and second standard.
Further, said first grade standard powder weight ratio is 5-30%, and second grade standard powder weight ratio is 70-95%, and all the other are other grade.
Ferriferous oxide can be selected Fe2O3.Said thermal treatment finished product, the injection molding permanent ferrite powder belongs to the magnetoplumbite crystalline structure, and median size is 1.1-3.5 μ m, and chemical formula is AOn (Fe
2O
3), wherein, A is one or both mixtures among Sr, Ba, Pb and the Ca, and 5.1≤n≤6.1.
Injection molding of the present invention is with the method for manufacture of permanent ferrite powder; Because having added compact agent does not need moulding process; But mixed powder directly burns till; When dry method is directly burnt till; Normal temperature is big to the heating curve adjustment elasticity of firing temperature, can adopt calcining kiln at intermittence such as calcining kiln or retort furnace, top-hat kiln continuously such as rotary kiln, pushed bat kiln.And after dry method directly burns till, can directly wash without process broken and/or corase grind, levigate and become fine powder.Technology is simple, and can obtain that grain morphology ideal, fillibility are good, the injection molding permanent ferrite powder of low cost of manufacture, and the magnetic force of produced injection molding permanent-magnet ferrite is high and evenly.
Embodiment
Below in conjunction with specific embodiment, the present invention is further specified.But practical application of the present invention is not limited to these embodiment.
Embodiment 1: n=5.7 measures ferric oxide and Strontium carbonate powder in molar ratio, and mixes, and adds adjuvant for combustion strontium chloride and compact agent lime carbonate, mixing respectively by 5% and 1% of mixture weight ratio.The mixing powder directly burns till at electric furnace, and 1200 ℃ are incubated 100 minutes.Be fine into mean particle size through wet grinding mill and be respectively 0.7 μ m, 2.2 μ m and 1.3 μ m 3 parts burning till gains.Take by weighing the levigate washing and drying thing of 0.7 μ m, 2.2 μ m and 1.3 μ m respectively in 20: 75: 5 ratios, after the blending dispersion,, obtain the ferrite material powder of embodiment 1 920 ℃ of thermal treatments of electric furnace 60 minutes.
The ferrite material powder that obtains: mean particle size is 1.4 μ m, and pressed density is 3.47g/cm
3, σ s is 57.1emu/g.
Embodiment 2: n=5.5 measures ferric oxide and Strontium carbonate powder in molar ratio, and mixes, and adds adjuvant for combustion strontium chloride and compact agent zinc oxide, mixing respectively by 5% and 1% of mixture weight ratio.The mixing powder directly burns till at electric furnace, and 1180 ℃ are incubated 100 minutes.Be fine into mean particle size through wet grinding mill and be respectively 0.65 μ m and 2.0 μ m 2 parts burning till gains.Take by weighing the levigate washing and drying thing of 0.65 μ m and 2.0 μ m respectively in 20: 80 ratios, after the blending dispersion,, obtain the ferrite material powder of embodiment 2 910 ℃ of thermal treatments of electric furnace 60 minutes.
The ferrite material powder that obtains: mean particle size is 1.3 μ m, and pressed density is 3.41g/cm
3, σ s is 57.5emu/g.
Embodiment 3: n=5.8 measures ferric oxide and barium carbonate in molar ratio, and mixes, and adds adjuvant for combustion strontium chloride and compact agent Sodium Tetraborate, mixing respectively by 4% and 1.5% of mixture weight ratio.The mixing powder directly burns till at electric furnace, and 1220 ℃ are incubated 80 minutes.Be fine into mean particle size through wet grinding mill and be respectively 0.8 μ m and 2.3 μ m 2 parts burning till gains.Take by weighing the levigate washing and drying thing of 0.8 μ m and 2.3 μ m respectively in 25: 75 ratios, after the blending dispersion,, obtain the ferrite material powder of embodiment 3 930 ℃ of thermal treatments of electric furnace 60 minutes.
The ferrite material powder that obtains: mean particle size is 1.5 μ m, and pressed density is 3.45g/cm
3, σ s is 56.8emu/g.
Comparing embodiment: n=5.6 measures ferric oxide and Strontium carbonate powder in molar ratio; And mix; Grind sand by 5% of mixture weight ratio and add the adjuvant for combustion strontium chloride; Make ball; Dry at electric furnace then; Burn till, 1220 ℃ of heat preservation methods 120 minutes and 1080 ℃ were respectively done one in 60 minutes, and to be fine into mean particle size through wet grinding mill respectively be 2.3 μ m and 0.7 μ m.Take by weighing the levigate washing and drying thing of 2.3 μ m and 0.7 μ m respectively in 80: 20 ratios, after the blending dispersion,, obtain the ferrite material powder of relatively implementing 915 ℃ of thermal treatments of electric furnace 60 minutes.
The ferrite material powder that obtains: mean particle size is 1.57 μ m, and pressed density is 3.36g/cm
3, σ s is 56.9emu/g.
Above embodiment only is illustrating spirit of the present invention; Person of ordinary skill in the field of the present invention possibly do various modifications or replenishes or similar fashion substitutes these embodiment; But can't depart from spirit of the present invention, or can not surmount the defined scope of claims of the present invention.
Claims (10)
1. injection molding permanent ferrite powder method of manufacture; It is characterized in that comprising following processing step: at first; The raw material uniform mixing that to form by ferriferous oxide, A carbonate, compact agent, adjuvant for combustion, wherein, A is one or both mixtures among Sr, Ba, the Pb; Secondly, will mix back raw material dry method fires; Then, will fire the back and expect that powder is levigate again; At last, thermal treatment.
2. a kind of injection molding permanent ferrite powder method of manufacture according to claim 1 is characterized in that: said compact agent is the oxide compound of calcium, zinc, boron or one or more mixtures in the salt.
3. a kind of injection molding permanent ferrite powder method of manufacture according to claim 2 is characterized in that: said compact agent is one or more mixtures in lime carbonate, zinc oxide, the boric acid.
4. a kind of injection molding permanent ferrite powder method of manufacture according to claim 3, it is characterized in that: the weight of said compact agent accounts for the 0.05-2% of raw material gross weight.
5. a kind of injection molding permanent ferrite powder method of manufacture according to claim 1 is characterized in that: said adjuvant for combustion is strontium chloride or bariumchloride, and the weight of said adjuvant for combustion accounts for the 3-6% of raw material gross weight.
6. injection molding permanent ferrite powder method of manufacture according to claim 4 is characterized in that: the temperature when said dry method is fired is 1100-1260 ℃.
7. injection molding permanent ferrite powder method of manufacture according to claim 6 is characterized in that: before the said thermal treatment powder mean particle size be controlled to be 1.0-3.3 μ m, thermal treatment temp is at 820-1000 ℃.
8. according to each described injection molding permanent ferrite powder method of manufacture of claim 1 to 7, it is characterized in that: saidly levigately divide two grade standards at least, and should be with the powder uniform mixing of several grain size category standards before the thermal treatment.
9. injection molding permanent ferrite powder method of manufacture according to claim 8; It is characterized in that: said levigate two grade standards of dividing at least; Wherein, First grade median size is 0.5-1.0 μ m; Second grade median size is 1.3-4.5 μ m, the median size of the 3rd or other grade standard should be between between first and second standard.
10. injection molding permanent ferrite powder method of manufacture according to claim 9 is characterized in that: said first grade standard powder weight ratio is 5-30%, and second grade standard powder weight ratio is 70-95%, and all the other are other grade.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105836808A (en) * | 2016-03-17 | 2016-08-10 | 浙江安特磁材有限公司 | Bonded ferrite magnetic powder, bonding magnet and preparation method thereof |
| CN114974875A (en) * | 2022-06-30 | 2022-08-30 | 余子欣 | Preparation method of environment-friendly high-performance bonded permanent magnetic ferrite magnetic powder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540687A (en) * | 2003-04-24 | 2004-10-27 | 同和矿业株式会社 | Spliced magnet and ferrite magnetic powder for splicing same |
| CN101205138A (en) * | 2007-03-23 | 2008-06-25 | 横店集团东磁股份有限公司 | Method for manufacturing sintered permanent ferrite powder |
| CN101830693A (en) * | 2010-04-17 | 2010-09-15 | 广东省梅州市磁性材料厂 | Method for manufacturing strontium ferrite rubber plastic magnetic powder with low chlorine content |
| CN101894648A (en) * | 2010-07-02 | 2010-11-24 | 北矿磁材科技股份有限公司 | Bonded ferrite magnetic powder, preparation method thereof and bonded permanent magnet |
-
2011
- 2011-07-19 CN CN2011102027274A patent/CN102351525A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540687A (en) * | 2003-04-24 | 2004-10-27 | 同和矿业株式会社 | Spliced magnet and ferrite magnetic powder for splicing same |
| CN101205138A (en) * | 2007-03-23 | 2008-06-25 | 横店集团东磁股份有限公司 | Method for manufacturing sintered permanent ferrite powder |
| CN101830693A (en) * | 2010-04-17 | 2010-09-15 | 广东省梅州市磁性材料厂 | Method for manufacturing strontium ferrite rubber plastic magnetic powder with low chlorine content |
| CN101894648A (en) * | 2010-07-02 | 2010-11-24 | 北矿磁材科技股份有限公司 | Bonded ferrite magnetic powder, preparation method thereof and bonded permanent magnet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105836808A (en) * | 2016-03-17 | 2016-08-10 | 浙江安特磁材有限公司 | Bonded ferrite magnetic powder, bonding magnet and preparation method thereof |
| CN105836808B (en) * | 2016-03-17 | 2018-05-11 | 浙江安特磁材有限公司 | A kind of bonded ferrite magnetic powder and bonded permanent magnet and preparation method thereof |
| CN114974875A (en) * | 2022-06-30 | 2022-08-30 | 余子欣 | Preparation method of environment-friendly high-performance bonded permanent magnetic ferrite magnetic powder |
| CN114974875B (en) * | 2022-06-30 | 2023-11-14 | 余子欣 | Preparation method of environment-friendly high-performance bonded permanent magnetic ferrite magnetic powder |
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Application publication date: 20120215 |