CN105023691A - Iron oxide based anti-electromagnetic interference magnet material and preparation method - Google Patents
Iron oxide based anti-electromagnetic interference magnet material and preparation method Download PDFInfo
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Abstract
The invention provides an iron oxide based anti-electromagnetic interference magnet material which comprises the following constituents based on weight by percent: 1-3.5% of titanium oxide, 2-5% of boron, 0-3% of yttrium-iron alloy, 1-5% of aluminum oxide, 5-25% of manganese oxide, 5-25% of zinc oxide and the balance of iron oxide. A preparation method thereof comprises six steps of material mixing, grinding, pre-roasting, auxiliary material addition, forming at a static pressure, sintering and the like. The process is simple, production condition requirement is low, the raw material cost is lower than that of the traditional magnet, thus, flexible and high-efficient development on magnet production preparation works can be promoted, reduction on magnet production cost is promoted, meanwhile, the magnet density and structural strength are effectively improved, grain stability is high in the inside of the magnet, grain growth speed is high, the electrical resistivity and the anti-electromagnetic interference capability of the magnet can be enhanced, eddy-current loss, magnetic hysteresis loss and magnetocrystalline anisotropy constant of the magnet are reduced, and the magnetic conductivity temperature and frequency characteristics of the magnet are effectively optimized and improved.
Description
Technical field
The present invention relates to a kind of electromagnetism interference magnet material based on iron oxide and preparation method, belong to permanent magnet production technical field.
Background technology
The effect that permanent magnet all has machine important among plurality of devices, therefore the serviceability of magnet directly affects the serviceability of equipment, but find in actual use, the magnet that current loud speaker uses mostly is the magnet based on iron oxide material, although the low production cost of this kind of magnet, substantially can meet and use needs, but current iron oxide magnetic volume density and structural strength relatively little, in production process, grain growth speed is slow, magnet internal grain stability is bad, thus cause magnet resistivity in use less, eddy current loss, magnetic hysteresis loss is comparatively serious, anti-electromagnetic interference capability is extremely weak, cause magnet operation stability not enough on the one hand, the magnetic decline of magnet is obvious and rapid after long-term use on the other hand, thus had a strong impact on useful life and the serviceability of equipment, for this problem, current exploitation is except the Novel magnetic body based on rare earth material, although this magnet effectively can overcome the ferromagnetic numerous deficiency of conventional oxidation, but the magnet generation complex process of rare earth material, production cost and cost of material are all higher, therefore actual use ability is very limited, therefore also in the urgent need to developing a kind of brand-new magnet material and preparation method, with the needs that satisfied reality uses.
Summary of the invention
The object of this invention is to provide and the invention provides a kind of electromagnetism interference magnet material based on iron oxide and preparation method.
In order to achieve the above object, the invention provides following technical scheme:
Based on an electromagnetism interference magnet material for iron oxide, between each component and component, mass ratio is: titanium oxide 1%-3.5%, boron 2%-5%, yttrium iron alloy 0-3%, aluminium oxide 1%-5%, manganese oxide 5%-25%, zinc oxide 5%-25%, surplus is iron oxide.
Further, the iron ion of described iron oxide is ferrous ion, ferric ion or ferrous ion and ferric ion mixing, when wherein said ferrous ion and ferric ion mixing, the proportionate relationship of ferrous ion and ferric ion is 1: 1-1: 5.
Further, described titanium oxide, boron, yttrium iron alloy, aluminium oxide, manganese oxide, zinc oxide and iron oxide are nutty structure, and the largest particles diameter is greater than 3 millimeters.
Based on a preparation method for the electromagnetism interference magnet material of iron oxide, comprise the steps:
The first step, mixing of materials, mixes manganese oxide, zinc oxide and iron oxide first in proportion, and stirs;
Second step, milled processed, milling apparatus will be utilized to carry out attrition process through mixed material, the material particles dynamics after grinding is 40-600 order;
3rd step, preroast is processed, and carry out high-temperature roasting processing to the mixed material after grinding, wherein sintering temperature is 800 DEG C-900 DEG C, and roasting time is 50-150 minute, and after roasting, mixed material naturally cools to normal temperature;
4th step, adds auxiliary material, after being cooled to normal temperature through the mixed material of roasting, titanium dioxide, boron, yttrium iron alloy and alumina material is added in proportion in mixed material, and fully mix, then grind, the material particles dynamics after grinding is 40-600 order;
5th step, hydrostatic profile, bonding agent is added and fully mixing in the raw material through the 4th step process, then utilize mould and die casting equipment to carry out pressure to raw material and build up shape, obtain magnet blank, and separately carry out static pressure Ageing Treatment by balancing weight through the blank that overvoltage builds up type, balancing weight weight is 1-3 times that presses pressure when building up type, static pressure Ageing Treatment is simultaneously another carries out natural drying process to blank, after dry, blank water content is not more than 10%, and stops static pressure Ageing Treatment again after blank drying completes;
6th step, sintering processing, the blank that 5th step processes is sent in sintering furnace and carries out high temperature sintering, wherein sintering temperature 500 DEG C-1500 DEG C, wherein the heating temperature rise speed of room temperature to 600 DEG C is 50-70 DEG C/h, wherein the heating temperature rise speed of 600 DEG C to 1500 DEG C is 100-200 DEG C/h, to be heated to Isothermal sinter 2-6 hour during maximum temperature, then lower the temperature, during cooling, maximum temperature is to forced cooling when 1000 DEG C, and cooling rate is 70-200 DEG C/h, 1000 DEG C adopt Temperature fall to obtain finished product to room temperature.
Further, in the 5th described step, interpolation bonding agent is polyvinyl alcohol water solution, and after adding bonding agent, in mixture, water content is little with 40%.
Present invention process is simple, working condition requires low, and cost of material also comparatively conventional magnet relative moderate, thus can contribute to flexible and efficient carrying out magnet generation preparation work, and contribute to the production cost reducing magnet, simultaneously, separately effectively raise magnet density and structural strength, magnet internal grain good stability, grain growth speed block, and the resistivity of magnet can be improve, anti-electromagnetic interference capability, reduce the eddy current loss of magnet, magnetic hysteresis loss and magnetocrystalline anisotropy constant, also the effective magnetic permeability temperature to magnet and frequency characteristic are optimized improvement, thus magnet total quality stability in use can be effectively raised.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the inventive method flow chart;
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The electromagnetism interference magnet material based on iron oxide as a kind of in Fig. 1, between each component and component, mass ratio is: titanium oxide 2%, boron 2%, yttrium iron alloy 1.5%, aluminium oxide 5%, manganese oxide 20%, zinc oxide 10%, surplus is iron oxide.
In the present embodiment, the iron ion of described iron oxide is ferrous ion, ferric ion or ferrous ion and ferric ion mixing, when wherein said ferrous ion and ferric ion mixing, the proportionate relationship of ferrous ion and ferric ion is 1: 2.
In the present embodiment, described titanium oxide, boron, yttrium iron alloy, aluminium oxide, manganese oxide, zinc oxide and iron oxide are nutty structure, and the largest particles diameter is 1 millimeter.
Based on a preparation method for the electromagnetism interference magnet material of iron oxide, comprise the steps:
The first step, mixing of materials, mixes manganese oxide, zinc oxide and iron oxide first in proportion, and stirs;
Second step, milled processed, milling apparatus will be utilized to carry out attrition process through mixed material, the material particles dynamics after grinding is 70 orders;
3rd step, preroast is processed, and carry out high-temperature roasting processing to the mixed material after grinding, wherein sintering temperature is 850 DEG C, and roasting time is 150 minutes, and after roasting, mixed material naturally cools to normal temperature;
4th step, add auxiliary material, after being cooled to normal temperature through the mixed material of roasting, adding titanium dioxide, boron, yttrium iron alloy and alumina material in proportion, and fully mix, then grind in mixed material, the material particles dynamics after grinding is 150 orders;
5th step, hydrostatic profile, polyvinyl alcohol water solution bonding agent is added and fully mixing in the raw material through the 4th step process, after adding bonding agent, in mixture, water content is 40%, then utilize mould and die casting equipment to carry out pressure to raw material and build up shape, obtain magnet blank, and separately carry out static pressure Ageing Treatment by balancing weight through the blank that overvoltage builds up type, balancing weight weight is 3 times that press pressure when building up type, static pressure Ageing Treatment is simultaneously another carries out natural drying process to blank, after dry, blank water content is 3%, and static pressure Ageing Treatment is stopped again after blank drying completes,
6th step, sintering processing, the blank that 5th step processes is sent in sintering furnace and carries out high temperature sintering, wherein sintering temperature 1450 DEG C, wherein the heating temperature rise speed of room temperature to 600 DEG C is 70 DEG C/h, wherein the heating temperature rise speed of 600 DEG C to 1450 DEG C is 100 DEG C/h, to be heated to Isothermal sinter 4 hours during maximum temperature, then lower the temperature, during cooling, maximum temperature is to forced cooling when 1000 DEG C, and cooling rate is 80 DEG C/h, 1000 DEG C adopt Temperature fall to obtain finished product to room temperature.
Embodiment 2
The electromagnetism interference magnet material based on iron oxide as a kind of in Fig. 1, between each component and component, mass ratio is: titanium oxide 2%, boron 3%, aluminium oxide 3%, manganese oxide 15%, zinc oxide 15%, surplus is iron oxide.
In the present embodiment, the iron ion of described iron oxide is ferrous ion, ferric ion or ferrous ion and ferric ion mixing, when wherein said ferrous ion and ferric ion mixing, the proportionate relationship of ferrous ion and ferric ion is 1: 2.
In the present embodiment, described titanium oxide, boron, yttrium iron alloy, aluminium oxide, manganese oxide, zinc oxide and iron oxide are nutty structure, and the largest particles diameter is 2 millimeters.
Based on a preparation method for the electromagnetism interference magnet material of iron oxide, comprise the steps:
The first step, mixing of materials, mixes manganese oxide, zinc oxide and iron oxide first in proportion, and stirs;
Second step, milled processed, milling apparatus will be utilized to carry out attrition process through mixed material, the material particles dynamics after grinding is 90 orders;
3rd step, preroast is processed, and carry out high-temperature roasting processing to the mixed material after grinding, wherein sintering temperature is 700 DEG C, and roasting time is 50 minutes, and after roasting, mixed material naturally cools to normal temperature;
4th step, add auxiliary material, after being cooled to normal temperature through the mixed material of roasting, adding titanium dioxide, boron and alumina material in proportion, and fully mix, then grind in mixed material, the material particles dynamics after grinding is 100 orders;
5th step, hydrostatic profile, polyvinyl alcohol water solution bonding agent is added and fully mixing in the raw material through the 4th step process, after adding bonding agent, in mixture, water content is 30%, then utilize mould and die casting equipment to carry out pressure to raw material and build up shape, obtain magnet blank, and separately carry out static pressure Ageing Treatment by balancing weight through the blank that overvoltage builds up type, balancing weight weight is 2 times that press pressure when building up type, static pressure Ageing Treatment is simultaneously another carries out natural drying process to blank, after dry, blank water content is 3%, and static pressure Ageing Treatment is stopped again after blank drying completes,
6th step, sintering processing, the blank that 5th step processes is sent in sintering furnace and carries out high temperature sintering, wherein sintering temperature 1100 DEG C, wherein the heating temperature rise speed of room temperature to 600 DEG C is 50 DEG C/h, wherein the heating temperature rise speed of 600 DEG C to 1100 DEG C is 100 DEG C/h, to be heated to Isothermal sinter 3 hours during maximum temperature, then lower the temperature, during cooling, maximum temperature is to forced cooling when 1000 DEG C, and cooling rate is 100 DEG C/h, 1000 DEG C adopt Temperature fall to obtain finished product to room temperature.
Present invention process is simple, working condition requires low, and cost of material also comparatively conventional magnet relative moderate, thus can contribute to flexible and efficient carrying out magnet generation preparation work, and contribute to the production cost reducing magnet, simultaneously, separately effectively raise magnet density and structural strength, magnet internal grain good stability, grain growth speed block, and the resistivity of magnet can be improve, anti-electromagnetic interference capability, reduce the eddy current loss of magnet, magnetic hysteresis loss and magnetocrystalline anisotropy constant, also the effective magnetic permeability temperature to magnet and frequency characteristic are optimized improvement, thus magnet total quality stability in use can be effectively raised.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (5)
1. the electromagnetism interference magnet material based on iron oxide, it is characterized in that: described based on mass ratio between each component in the electromagnetism interference magnet material of iron oxide and component is: titanium oxide 1%-3.5%, boron 2%-5%, yttrium iron alloy 0-3%, aluminium oxide 1%-5%, manganese oxide 5%-25%, zinc oxide 5%-25%, surplus is iron oxide.
2. a kind of electromagnetism interference magnet material based on iron oxide according to claim 1, it is characterized in that: the iron ion of described iron oxide is ferrous ion, ferric ion or ferrous ion and ferric ion mixing, when wherein said ferrous ion and ferric ion mixing, the proportionate relationship of ferrous ion and ferric ion is 1: 1-1: 5.
3. a kind of electromagnetism interference magnet material based on iron oxide according to claim 1, it is characterized in that: described titanium oxide, boron, yttrium iron alloy, aluminium oxide, manganese oxide, zinc oxide and iron oxide are nutty structure, and the largest particles diameter is greater than 3 millimeters.
4. based on a preparation method for the electromagnetism interference magnet material of iron oxide, it is characterized in that: described preparation method comprises the steps:
The first step, mixing of materials, mixes manganese oxide, zinc oxide and iron oxide first in proportion, and stirs;
Second step, milled processed, milling apparatus will be utilized to carry out attrition process through mixed material, the material particles dynamics after grinding is 40-600 order;
3rd step, preroast is processed, and carry out high-temperature roasting processing to the mixed material after grinding, wherein sintering temperature is 800 DEG C-900 DEG C, and roasting time is 50-150 minute, and after roasting, mixed material naturally cools to normal temperature;
4th step, adds auxiliary material, after being cooled to normal temperature through the mixed material of roasting, titanium dioxide, boron, yttrium iron alloy and alumina material is added in proportion in mixed material, and fully mix, then grind, the material particles dynamics after grinding is 40-600 order;
5th step, hydrostatic profile, bonding agent is added and fully mixing in the raw material through the 4th step process, then utilize mould and die casting equipment to carry out pressure to raw material and build up shape, obtain magnet blank, and separately carry out static pressure Ageing Treatment by balancing weight through the blank that overvoltage builds up type, balancing weight weight is 1-3 times that presses pressure when building up type, static pressure Ageing Treatment is simultaneously another carries out natural drying process to blank, after dry, blank water content is not more than 10%, and stops static pressure Ageing Treatment again after blank drying completes;
6th step, sintering processing, the blank that 5th step processes is sent in sintering furnace and carries out high temperature sintering, wherein sintering temperature 500 DEG C-1500 DEG C, wherein the heating temperature rise speed of room temperature to 600 DEG C is 50-70 DEG C/h, wherein the heating temperature rise speed of 600 DEG C to 1500 DEG C is 100-200 DEG C/h, to be heated to Isothermal sinter 2-6 hour during maximum temperature, then lower the temperature, during cooling, maximum temperature is to forced cooling when 1000 DEG C, and cooling rate is 70-200 DEG C/h, 1000 DEG C adopt Temperature fall to obtain finished product to room temperature.
5. a kind of electromagnetism interference magnet material based on iron oxide according to claim 4 and preparation method, it is characterized in that: in the 5th described step, interpolation bonding agent is polyvinyl alcohol water solution, and after adding bonding agent, in mixture, water content is little with 40%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105957685A (en) * | 2016-05-30 | 2016-09-21 | 南通万宝实业有限公司 | Permanent magnet for loudspeaker and preparation method thereof |
| CN108987012A (en) * | 2017-06-01 | 2018-12-11 | 宜宾金原复合材料有限公司 | Composite electromagnetic wave absorbing material preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105957685A (en) * | 2016-05-30 | 2016-09-21 | 南通万宝实业有限公司 | Permanent magnet for loudspeaker and preparation method thereof |
| CN108987012A (en) * | 2017-06-01 | 2018-12-11 | 宜宾金原复合材料有限公司 | Composite electromagnetic wave absorbing material preparation method |
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