CN104124025A - Silicon-based rare earth ferromagnetic core material - Google Patents
Silicon-based rare earth ferromagnetic core material Download PDFInfo
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- CN104124025A CN104124025A CN201410287868.4A CN201410287868A CN104124025A CN 104124025 A CN104124025 A CN 104124025A CN 201410287868 A CN201410287868 A CN 201410287868A CN 104124025 A CN104124025 A CN 104124025A
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Abstract
The invention discloses a silicon-based rare earth ferromagnetic core material which comprises main materials and additives. The main materials comprise, by molar ratios, 60.5-70 moles of Fe2O3, 23-30.5 moles of manganese oxide, 6-8.6 moles of zinc oxide and 0.2-0.35 moles of titanium dioxide. The additives comprise the following ingredients according to weight radios of the addictives in the ferromagnetic core material: 60-80 ppm of V2O5, 20-40 ppm of barium oxide, and 200-1000 ppm of silicon-based rare earth composite magnetic powder. According to the silicon-based rare earth ferromagnetic core material, the rear earth composite magnetic powder which is high in magnetic energy product and stable in magnetic property is added into the ferromagnetic core material, the mechanical performance of the ferromagnetic core material can be improved obviously, and the porosity is reduced.
Description
Technical field
The present invention relates generally to oxidate magnetic material and manufactures field, relates in particular to a kind of silicon base lanthanon ferromagnetic core material.
Background technology
Along with the communication technology and the digitized development of electronic product; soft magnetic ferrite and element have been proposed to new requirement; high-performance high magnetic permeability magnetic core is widely used in each type telecommunications and information stock, as the fields such as common-mode filter, pulsactor, current transformer, earth leakage protective device, insulating transformer, signal and pulse transformer are widely applied.Telecommunications industry needs FERRITE CORE to have low core loss and high magnetic permeability now, and to meet microminiaturization and the high efficiency requirement of present electric equipment, existing magnetic core is difficult to meet above-mentioned requirements;
Its magnetic energy product of the permanent magnetic material that rare earth makes can reach 150 times of carbon steel, 3～5 times of Al-Ni-Co permanent magnet material, 8～10 times of permanent-magnet ferrite, and temperature coefficient is low, magnetic stability, coercive force is up to 800 kilo-ampere/rice.Be mainly used in the magnetic system of low speed torque motor, actuating motor, transducer, magnetic bearing etc.Nd-Fe-Bo permanent magnet material is third generation rare earth permanent-magnetic material, and its remanent magnetism, coercive force and maximum magnetic energy product are higher than the former, non-friable, has good mechanical performance, and alloy density is low, is conducive to lightness, slimming, the small-sized and subminaturization of magnetic element.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, and a kind of silicon base lanthanon ferromagnetic core material is provided.
The present invention is achieved by the following technical solutions:
A kind of silicon base lanthanon ferromagnetic core material, it comprises major ingredient and additive, described major ingredient comprises according to mol ratio: the zinc oxide of the Fe2O3 of 60.5-70 mol, the manganese oxide of 23-30.5 mol, 6-8.6 mol, the titanium dioxide of 0.2-0.35 mol; Additive comprises according to the weight ratio meter that accounts for described ferromagnetic core material: the rare earth compounded magnetic conductive powder of the V2O5 of 60-80ppm, the barium monoxide of 20-40ppm, 200-1000ppm;
The preparation of described rare earth compounded magnetic conductive powder comprises the following steps:
(1) preparation of silicon emulsion:
Polyvinyl alcohol is heated to 65-70 DEG C, mixes with silicon powder, trimethylolpropane, stir, obtain premix;
Hexadecyltrimethylammonium chloride is joined in 200-300 times of water, add premix, 200-300 rev/min of dispersed with stirring 4-7 minute, obtains silicon emulsion;
(2) polyvinylpyrrolidone is joined in lanthanum chloride solution, at 60-80 DEG C, be uniformly mixed 10-20 minute, add ammonium bicarbonate aqueous solution, insulation 3-5h, adds above-mentioned silicon emulsion, is stirred to normal temperature, centrifugal dehydration, 200 DEG C of dry 30-40 minute of 100-, calcine 7-10 hour at 600-800 DEG C, obtain described rare earth compounded magnetic conductive powder.
The concentration of described lanthanum chloride solution is 0.8-2mol/L; The concentration of ammonium bicarbonate aqueous solution is that 20-30%, consumption are the 30-40% of lanthanum chloride solution weight;
Described polyvinylpyrrolidone and the mol ratio of lanthanum chloride are 1-2:1;
Described silicon powder and the mass ratio of lanthanum chloride are 10-20:1;
The mass ratio of described polyvinyl alcohol, silicon powder, trimethylolpropane, hexadecyltrimethylammonium chloride is 2-3:100:1-2:1-2.
A preparation method for silicon base lanthanon ferromagnetic core material, comprises the following steps:
(1) above-mentioned major ingredient is sent into blending tank, 3000-4000 rev/min is stirred mixed 2-4 hour, sends into rotary furnace pre-burning, control 400 DEG C of temperature 300-, the pre-burning time is 2-4 hour, sends into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, being ground to fineness is 40-100 μ m;
(2) additive is sent into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, be wherein added with the aluminium dihydrogen phosphate that is equivalent to weight of additive 0.6-2%, being ground to fineness is 30-50 μ m;
(3) above-mentioned each raw material after treatment is mixed, spraying is dry, is pressed into base, and sintering, obtains described silicon base lanthanon ferromagnetic core material.
Advantage of the present invention is:
The rare earth compounded magnetic conductive powder magnetic energy product that ferromagnetic core material of the present invention adds is high, and magnetic stability can obviously improve the mechanical performance of ferromagnetic core material, reduces the porosity.
Embodiment
Embodiment 1
A kind of silicon base lanthanon ferromagnetic core material, is characterized in that it comprises major ingredient and additive, and described major ingredient comprises according to mol ratio: the zinc oxide of the Fe2O3 of 60.5mol, the manganese oxide of 30.5 mol, 7.6 mol, the titanium dioxide of 0.35 mol; Additive comprises according to the weight ratio meter that accounts for described ferromagnetic core material: the rare earth compounded magnetic conductive powder of the V2O5 of 80ppm, the barium monoxide of 40ppm, 1000ppm;
The preparation of described rare earth compounded magnetic conductive powder comprises the following steps:
(1) preparation of silicon emulsion:
Polyvinyl alcohol is heated to 70 DEG C, mixes with silicon powder, trimethylolpropane, stir, obtain premix;
Hexadecyltrimethylammonium chloride is joined in 300 times of water, add premix, 300 revs/min of dispersed with stirring 4-7 minute, obtain silicon emulsion;
(2) polyvinylpyrrolidone is joined in lanthanum chloride solution, at 80 DEG C, be uniformly mixed 20 minutes, add ammonium bicarbonate aqueous solution, insulation 3h, adds above-mentioned silicon emulsion, is stirred to normal temperature, centrifugal dehydration, 200 DEG C dry 30 minutes, calcine 8 hours at 800 DEG C, obtain described rare earth compounded magnetic conductive powder.
The concentration of described lanthanum chloride solution is 0.8mol/L; The concentration of ammonium bicarbonate aqueous solution is 30%, consumption is 40% of lanthanum chloride solution weight;
Described polyvinylpyrrolidone and the mol ratio of lanthanum chloride are 2:1;
Described silicon powder and the mass ratio of lanthanum chloride are 20:1;
The mass ratio of described polyvinyl alcohol, silicon powder, trimethylolpropane, hexadecyltrimethylammonium chloride is 3:100:2:2.
A preparation method for silicon base lanthanon ferromagnetic core material, comprises the following steps:
(1) above-mentioned major ingredient is sent into blending tank, 4000 revs/min are stirred mixed 4 hours, send into rotary furnace pre-burning, control 400 DEG C of temperature, the pre-burning time is 2 hours, sends into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, being ground to fineness is 100 μ m;
(2) additive is sent into grinding pot, adopt the alcohol water blend that abrasive media is 20%, be wherein added with the aluminium dihydrogen phosphate that is equivalent to weight of additive 0.6%, being ground to fineness is 50 μ m;
(3) above-mentioned each raw material after treatment is mixed, spraying is dry, is pressed into base, and sintering, obtains described silicon base lanthanon ferromagnetic core material.
Through detection, the basic mechanical design feature index that the product of above-described embodiment 1 gained reaches:
The saturation induction density of magnetic core of the present invention can reach 15000 Gausses, and saturation flux rate density is 481mT, and Curie temperature is higher than 240 DEG C, resistivity 6.6 Ω .m.
Claims (2)
1. a silicon base lanthanon ferromagnetic core material, it is characterized in that it comprises major ingredient and additive, described major ingredient comprises according to mol ratio: the zinc oxide of the Fe2O3 of 60.5-70 mol, the manganese oxide of 23-30.5 mol, 6-8.6 mol, the titanium dioxide of 0.2-0.35 mol; Additive comprises according to the weight ratio meter that accounts for described ferromagnetic core material: the silicon base lanthanon compounded magnetic conductive powder of the V2O5 of 60-80ppm, the barium monoxide of 20-40ppm, 200-1000ppm;
The preparation of described silicon base lanthanon compounded magnetic conductive powder comprises the following steps:
(1) preparation of silicon emulsion:
Polyvinyl alcohol is heated to 65-70 DEG C, mixes with silicon powder, trimethylolpropane, stir, obtain premix;
Hexadecyltrimethylammonium chloride is joined in 200-300 times of water, add premix, 200-300 rev/min of dispersed with stirring 4-7 minute, obtains silicon emulsion;
(2) polyvinylpyrrolidone is joined in lanthanum chloride solution, at 60-80 DEG C, be uniformly mixed 10-20 minute, add ammonium bicarbonate aqueous solution, insulation 3-5h, adds above-mentioned silicon emulsion, is stirred to normal temperature, centrifugal dehydration, 200 DEG C of dry 30-40 minute of 100-, calcine 7-10 hour at 600-800 DEG C, obtain described rare earth compounded magnetic conductive powder;
The concentration of described lanthanum chloride solution is 0.8-2mol/L; The concentration of ammonium bicarbonate aqueous solution is that 20-30%, consumption are the 30-40% of lanthanum chloride solution weight;
Described polyvinylpyrrolidone and the mol ratio of lanthanum chloride are 1-2:1;
Described silicon powder and the mass ratio of lanthanum chloride are 10-20:1;
The mass ratio of described polyvinyl alcohol, silicon powder, trimethylolpropane, hexadecyltrimethylammonium chloride is 2-3:100:1-2:1-2.
2. a preparation method for silicon base lanthanon ferromagnetic core material as claimed in claim 1, is characterized in that comprising the following steps:
(1) above-mentioned major ingredient is sent into blending tank, 3000-4000 rev/min is stirred mixed 2-4 hour, sends into rotary furnace pre-burning, control 400 DEG C of temperature 300-, the pre-burning time is 2-4 hour, sends into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, being ground to fineness is 40-100 μ m;
(2) additive is sent into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, be wherein added with the aluminium dihydrogen phosphate that is equivalent to weight of additive 0.6-2%, being ground to fineness is 30-50 μ m;
(3) above-mentioned each raw material after treatment is mixed, spraying is dry, is pressed into base, and sintering, obtains described silicon base lanthanon ferromagnetic core material.
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| CN201410287868.4A CN104124025A (en) | 2014-06-25 | 2014-06-25 | Silicon-based rare earth ferromagnetic core material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270529A (en) * | 2016-08-11 | 2017-01-04 | 合肥毅创钣金科技有限公司 | A kind of high temperature resistant shock resistance ceramic-seal ring and preparation method thereof |
| CN110993241A (en) * | 2019-10-30 | 2020-04-10 | 安徽朗基新材料科技有限公司 | Soft magnetic ferrite material prepared based on nanoparticles and preparation method thereof |
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| US20050167632A1 (en) * | 2004-01-30 | 2005-08-04 | Tdk Corporation | Method for producing Mn-Zn ferrite |
| CN101593595A (en) * | 2009-04-10 | 2009-12-02 | 临沂中瑞电子有限公司 | A kind of low-temperature sintering high performance soft magnetic ferrite material and manufacture method |
| CN101857427A (en) * | 2009-04-08 | 2010-10-13 | 广东江粉磁材股份有限公司 | High-frequency low-loss MnZn ferrite material and manufacturing method thereof |
| CN102173767A (en) * | 2011-01-17 | 2011-09-07 | 临沂中瑞电子有限公司 | Magnetic material for photovoltaic inverter |
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2014
- 2014-06-25 CN CN201410287868.4A patent/CN104124025A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050167632A1 (en) * | 2004-01-30 | 2005-08-04 | Tdk Corporation | Method for producing Mn-Zn ferrite |
| CN101857427A (en) * | 2009-04-08 | 2010-10-13 | 广东江粉磁材股份有限公司 | High-frequency low-loss MnZn ferrite material and manufacturing method thereof |
| CN101593595A (en) * | 2009-04-10 | 2009-12-02 | 临沂中瑞电子有限公司 | A kind of low-temperature sintering high performance soft magnetic ferrite material and manufacture method |
| CN102173767A (en) * | 2011-01-17 | 2011-09-07 | 临沂中瑞电子有限公司 | Magnetic material for photovoltaic inverter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270529A (en) * | 2016-08-11 | 2017-01-04 | 合肥毅创钣金科技有限公司 | A kind of high temperature resistant shock resistance ceramic-seal ring and preparation method thereof |
| CN110993241A (en) * | 2019-10-30 | 2020-04-10 | 安徽朗基新材料科技有限公司 | Soft magnetic ferrite material prepared based on nanoparticles and preparation method thereof |
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