CN108987087A - A kind of preparation method for adulterating bismuth element magnetic material - Google Patents
A kind of preparation method for adulterating bismuth element magnetic material Download PDFInfo
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- CN108987087A CN108987087A CN201810769637.5A CN201810769637A CN108987087A CN 108987087 A CN108987087 A CN 108987087A CN 201810769637 A CN201810769637 A CN 201810769637A CN 108987087 A CN108987087 A CN 108987087A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
Abstract
The invention discloses a kind of preparation methods for adulterating bismuth element magnetic material, the technique is by bismuth meal, bismuthine, water chestnut bismuth mineral, iron oxide, manganese oxide, the magnetic material and artificial schellite of copper powder combination, boron nitride, sodium tripolyphosphate, thiodipropionic acid dilauryl cinnamic acid ester, kaolin group at non-magnetic material 2- mercapto benzimidazole is added after wet ball grinding and freeze-drying process respectively, isopropanolamine, polycarbonate, propylene glycol methyl ether acetate, propyl-triethoxysilicane, the raw materials such as stabilizer reaction, then pass through gradient smelting respectively, twin-screw extrusion, mold, liquid nitrogen rapid cooling, freezing solidification, it is dried with nitrogen, high-temperature vapor washing, naturally dry and etc. be prepared doping bismuth element magnetic material.The doping bismuth element magnetic material being prepared, electromagnetic performance is excellent, heatproof moisture-proof anti-seismic performance is good, can satisfy a variety of demands in industry.
Description
Technical field
The present invention relates to this technical fields of electronics new material, are related specifically to a kind of system for adulterating bismuth element magnetic material
Preparation Method.
Background technique
Magnetic material is that the material that certain mode is reacted can be made to magnetic field.Magnetic is showed in external magnetic field according to substance
The power of property, can be classified as diamagnetic substance, paramagnet, ferromagnetic material, antiferromagnetic substance and ferrimagnetism object
Matter.Most of materials are diamagnetisms or paramagnetic, and the reaction of their external magnetic fields is weaker.Ferromagnetic material and ferrimagnetism substance
It is ferromagnetic substance, usually said magnetic material refers to strong magnetic material.The development experience of magnetic material is from inorganic to having
Machine, solid-state to liquid, macroscopic view show to be situated between sight, electronics magnetic order to the orderly ferromagnetic material of nuclear-magnetism, single type to compound
Excellent magnetic property and overall characteristic out.Magnetic material has different classification due to classification standard and emphasis difference.Permanent magnetism
Material is also known as hard magnetic material, is found in history earliest, using also earliest ferromagnetic material.Since the 1960s the whole world forever
The output value of magnetic material just increased by 2.5 times every 10 years, and the output value in 2000 has reached 6,500,000,000 dollars, accounts for about the magnetic material gross output value
70%, be current most species and a most widely used major class magnetic material.Currently, the research and development direction of permanent-magnet material
Mainly have following two: first research direction is the rare earth permanent-magnetic material explored with Development of Novel.As ThMn_ { 12 } type body closes
Object, Sm2Fe17Nx、Sm2Fe17C compound etc..Sm-Fe-N system rare earth permanent magnet has and saturated magnetization similar in Nd-Fe-B system permanent magnetism
Intensity and (BH) m theoretical value, but anisotropy field is higher by 2.5 times, and Curie temperature is higher by 160K.Since the advent of the world, development ten
Divide rapidly, by reasonably adjusting ingredient, seeks preparation method appropriate, optimize magnet preparation process, sufficiently excavate potential magnetism
Can, production cost is reduced, magnet mass is improved, Sm-Fe-N system alloy gets a good chance of becoming novel practical permanent-magnet material.Another
Research direction is to develop Nanocomposite permanent-magnet material.The saturation magnetization of usual soft magnetic materials is higher than permanent-magnet material, and permanent magnetism
The magnetocrystalline anisotropy of material is higher than soft magnetic materials again, such as soft magnetic phase and permanent magnetism are mutually carried out within the scope of nanoscale it is compound,
Strong exchange-coupling interaction will be generated between particle, and leads to remanence curve, it is this to be received with what " PABX networking coupling " formed
Nano composite material is the new way for obtaining high energy product, to obtain while have the advantages that the high saturation and magnetic intensity of the two, height
Coercitive novel permanent magnetic material.But excellent electromagnetic performance still can be had both without one kind at present and good heatproof is resistance to
The magnetic material of wet shock resistance.
Bismuth (Bismuth) is a kind of metallic element, and it is the metal of red and white that the symbol of element, which is Bi, and atomic number is 83, close
Degree is 9.8g/cm3, fusing point is 271.3 DEG C, and boiling is 1560 DEG C of point.Bismuth has metallic luster, and property is crisp, and conductive and thermal conductivity is all poor,
It is simultaneously also the strongest metal of diamagnetism, resistivity increases under magnetic fields and thermal conductivity reduces.Outside the removal of mercury, bismuth is thermal conductivity
Minimum metal.Bismuth and its alloy have pyroelectric effect.Bismuth volume in solidification increases, expansion rate 3.3%.The selenides of bismuth
There is semiconductor property with tellurides.Unlike other heavy metals, the toxicity of bismuth is relatively fewer compared with lead or antimony.Bismuth
It is not easy to be absorbed by the body, it is not carcinogenic, DNA construction is not damaged yet, and permeable urination is taken out of external.For these reasons, bismuth passes through
Be commonly used for replace lead using upper.Such as unleaded bullet, on Pb-free solder or even drug and cosmetics.In addition to this,
Bismuth is also applied in alloy smelting, while being also one of ideal superconductor, battery, in semiconductor and nuclear industry material all
There is the application of bismuth.
Summary of the invention
It in order to solve the above-mentioned technical problem, should the invention discloses a kind of preparation method for adulterating bismuth element magnetic material
The magnetic material and artificial schellite, boron nitride, trimerization that technique combines bismuth meal, bismuthine, water chestnut bismuth mineral, iron oxide, manganese oxide, copper powder
Sodium phosphate, thiodipropionic acid dilauryl cinnamic acid ester, kaolin group at non-magnetic material pass through wet ball grinding and freeze-drying respectively
2- mercapto benzimidazole, isopropanolamine, polycarbonate, propylene glycol methyl ether acetate, propyl triethoxy are added after processing
The raw materials such as silane, stabilizer reaction, then respectively by gradient smelting, twin-screw extrusion, mold, liquid nitrogen rapid cooling, freezing
Solidify, be dried with nitrogen, high-temperature vapor washing, naturally dry and etc. be prepared doping bismuth element magnetic material.Preparation and
At doping bismuth element magnetic material, electromagnetic performance is excellent, heatproof moisture-proof anti-seismic performance is good, can satisfy a variety of in industry
Demand.
Technical solution: to solve the above-mentioned problems, the invention discloses a kind of preparation sides for adulterating bismuth element magnetic material
Method, comprising the following steps:
It (1) will be by 3-6 parts of bismuth meal, 2-4 parts of bismuthine, 3-6 parts of water chestnut bismuth mineral, 3-10 parts of iron oxide, 3-6 parts of manganese oxide, copper
1-5 parts of powder combination magnetic material mixtures and by 2-8 parts of artificial schellite, 4-9 parts of boron nitride, 1-3 parts of sodium tripolyphosphate, thio two
2-6 parts of propionic acid dilaurate, 5-10 parts of the kaolin non-magnetic mixtures formed are uniformly mixed respectively, are separately added into wet
It is ground in formula ball mill 10-24 hours, obtained Magnaglo and nonmagnetic powder mixture are sieved sorting respectively；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are carried out at freeze-drying respectively
Reason, obtained magnetic product and non magnetic product are saved backup in -80 DEG C；
(3) by 5-10 parts of 2- mercapto benzimidazole, 1-7 parts of isopropanolamine, 4-6 parts of polycarbonate, propylene glycol monomethyl ether vinegar
3-8 parts of acid esters, 4-9 parts of propyl-triethoxysilicane, 2-5 parts of stabilizer, mixing are added to electric arc furnaces, carry out melting reaction,
Temperature is increased to 200 DEG C, and insulation reaction 30-90 minutes, the magnetic production in step (2) is added after being naturally cooling to 150 DEG C or less
Object and non magnetic product are warming up to 220-225 DEG C after mixing evenly, while vacuumizing in electric arc furnaces, and sustained response 2-5 hours,
Then it is cooled to 80-85 DEG C, keeps the temperature 24-36 hours, it is spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3)；
(5) liquid nitrogen is sprayed to the casting of step (4) in freezing chamber, makes its rapid cooling, is then freezed in freezing chamber
Solidification 5-10 hours；
(6) then the freezing casting for taking out step (5) is rinsed with high-temperature vapor then with being dried with nitrogen, is natural
It dries and then packs to get finished product.
Preferably, it is 98:1 that the parameter of wet ball-milling, which is ratio of grinding media to material, in the step (1), and ball-milling medium is ethylene glycol, ball
1500 revs/min of revolving speed of mill.
Preferably, freeze-drying parameter is -30 DEG C of cryogenic temperature in the step (2), freezes pressure 25Pa, cooling time
2 hours.
Preferably, the stabilizer in the step (3) is selected from cadmium 2-ethylhexoate, barium laurate, zinc naphthenate, two laurels
One or more of sour dibutyl tin.
Preferably, the vacuum pressure in the step (3) is 50Pa or less.
Preferably, it is 220-260 DEG C that the double screw extruder parameter in the step (4), which is extruder temperature, screw speed
It is 500 revs/min.
Preferably, the high-temperature vapor temperature in the step (6) is 280-300 DEG C.
Compared with prior art, the present invention has the advantages that:
(1) preparation method of doping bismuth element magnetic material of the invention is by bismuth meal, bismuthine, water chestnut bismuth mineral, iron oxide, oxygen
Change the magnetic material and artificial schellite, boron nitride, sodium tripolyphosphate, thiodipropionic acid dilauryl cinnamic acid ester, kaolin of manganese, copper powder combination
The non-magnetic material of composition adds 2- mercapto benzimidazole, isopropanol after wet ball grinding and freeze-drying process respectively
The raw materials such as amine, polycarbonate, propylene glycol methyl ether acetate, propyl-triethoxysilicane, stabilizer reaction, then respectively by ladder
Degree melting, twin-screw extrusion, mold, liquid nitrogen rapid cooling, freezing solidifies, is dried with nitrogen, high-temperature vapor washs, naturally dry
And etc. be prepared doping bismuth element magnetic material.The doping bismuth element magnetic material being prepared, electromagnetic performance is excellent,
Heatproof moisture-proof anti-seismic performance is good, can satisfy a variety of demands in industry.
(2) doping bismuth element magnetic material raw material of the invention be easy to get, simple process, be suitable for heavy industrialization use,
It is practical.
Specific embodiment
Embodiment 1
(1) by by 3 parts of bismuth meal, 2 parts of bismuthine, 3 parts of water chestnut bismuth mineral, 3 parts of iron oxide, 3 parts of manganese oxide, 1 part of copper powder combination
Magnetic material mixture and by 2 parts of artificial schellite, 4 parts of boron nitride, 1 part of sodium tripolyphosphate, 2 parts of thiodipropionic acid dilauryl cinnamic acid ester,
The non-magnetic mixtures of 5 parts of kaolin compositions are uniformly mixed respectively, are separately added into wet ball mill and are ground 10 hours, obtain
To Magnaglo and nonmagnetic powder mixture be sieved respectively sorting, it is 98:1 that wherein the parameter of wet ball-milling, which is ratio of grinding media to material,
Ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are carried out at freeze-drying respectively
Reason, obtained magnetic product and non magnetic product are saved backup in -80 DEG C, wherein freeze-drying parameter is -30 DEG C of cryogenic temperature,
Freeze pressure 25Pa, cooling time 2 hours；
(3) by 5 parts of 2- mercapto benzimidazole, 1 part of isopropanolamine, 4 parts of polycarbonate, 3 parts of propylene glycol methyl ether acetate,
4 parts of propyl-triethoxysilicane, 2 parts of cadmium 2-ethylhexoate, mixing are added to electric arc furnaces, carry out melting reaction, and temperature increases
To 200 DEG C, insulation reaction 30 minutes, magnetic product and non magnetic production in step (2) are added after being naturally cooling to 150 DEG C or less
Object is warming up to 220-225 DEG C after mixing evenly, while vacuumizing in electric arc furnaces, and vacuum pressure is 50Pa hereinafter, sustained response 2
Hour, it is then cooled to 80-85 DEG C, keeps the temperature 24 hours, it is spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3), wherein double spiral shells
Bar extruder parameter is that extruder temperature is 220 DEG C, and screw speed is 500 revs/min；
(5) liquid nitrogen is sprayed to the casting of step (4) in freezing chamber, makes its rapid cooling, is then freezed in freezing chamber
Solidification 5 hours；
(6) then the freezing casting for taking out step (5) is rinsed then with being dried with nitrogen with high-temperature vapor, high temperature
Steam temperature is 280-300 DEG C, and then then naturally dry is packed to get finished product.
Embodiment 2
(1) by by 4 parts of bismuth meal, 3 parts of bismuthine, 4 parts of water chestnut bismuth mineral, 5 parts of iron oxide, 4 parts of manganese oxide, 2 parts of copper powder combination
Magnetic material mixture and by 4 parts of artificial schellite, 5 parts of boron nitride, 2 parts of sodium tripolyphosphate, 3 parts of thiodipropionic acid dilauryl cinnamic acid ester,
The non-magnetic mixtures of 7 parts of kaolin compositions are uniformly mixed respectively, are separately added into wet ball mill and are ground 15 hours, obtain
To Magnaglo and nonmagnetic powder mixture be sieved respectively sorting, it is 98:1 that wherein the parameter of wet ball-milling, which is ratio of grinding media to material,
Ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are carried out at freeze-drying respectively
Reason, obtained magnetic product and non magnetic product are saved backup in -80 DEG C, wherein freeze-drying parameter is -30 DEG C of cryogenic temperature,
Freeze pressure 25Pa, cooling time 2 hours；
(3) by 8 parts of 2- mercapto benzimidazole, 3 parts of isopropanolamine, 5 parts of polycarbonate, 6 parts of propylene glycol methyl ether acetate,
3 parts of barium laurate, mixing is added in electric arc furnaces, carrying out melting reaction, and temperature is increased to 200 DEG C, and insulation reaction 50 minutes,
Magnetic product and non magnetic product in step (2) are added after being naturally cooling to 150 DEG C or less, is warming up to 220- after mixing evenly
225 DEG C, while vacuumizing in electric arc furnaces, vacuum pressure is 50Pa hereinafter, sustained response 3 hours, is then cooled to 80-85 DEG C,
Heat preservation 28 hours, it is spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3), wherein double spiral shells
Bar extruder parameter is that extruder temperature is 230 DEG C, and screw speed is 500 revs/min；
(5) liquid nitrogen is sprayed to the casting of step (4) in freezing chamber, makes its rapid cooling, is then freezed in freezing chamber
Solidification 6 hours；
(6) then the freezing casting for taking out step (5) is rinsed then with being dried with nitrogen with high-temperature vapor, high temperature
Steam temperature is 280-300 DEG C, and then then naturally dry is packed to get finished product.
Embodiment 3
(1) by by 5 parts of bismuth meal, 3 parts of bismuthine, 5 parts of water chestnut bismuth mineral, 9 parts of iron oxide, 5 parts of manganese oxide, 4 parts of copper powder combination
Magnetic material mixture and by 7 parts of artificial schellite, 8 parts of boron nitride, 2 parts of sodium tripolyphosphate, 5 parts of thiodipropionic acid dilauryl cinnamic acid ester,
The non-magnetic mixtures of 9 parts of kaolin compositions are uniformly mixed respectively, are separately added into wet ball mill and are ground 20 hours, obtain
To Magnaglo and nonmagnetic powder mixture be sieved respectively sorting, it is 98:1 that wherein the parameter of wet ball-milling, which is ratio of grinding media to material,
Ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are carried out at freeze-drying respectively
Reason, obtained magnetic product and non magnetic product are saved backup in -80 DEG C, wherein freeze-drying parameter is -30 DEG C of cryogenic temperature,
Freeze pressure 25Pa, cooling time 2 hours；
(3) by 9 parts of 2- mercapto benzimidazole, 6 parts of isopropanolamine, 5 parts of polycarbonate, 7 parts of propylene glycol methyl ether acetate,
4 parts of zinc naphthenate, mixing is added in electric arc furnaces, carrying out melting reaction, and temperature is increased to 200 DEG C, and insulation reaction 70 minutes,
Magnetic product and non magnetic product in step (2) are added after being naturally cooling to 150 DEG C or less, is warming up to 220- after mixing evenly
225 DEG C, while vacuumizing in electric arc furnaces, vacuum pressure is 50Pa hereinafter, sustained response 4 hours, is then cooled to 80-85 DEG C,
Heat preservation 32 hours, it is spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3), wherein double spiral shells
Bar extruder parameter is that extruder temperature is 240 DEG C, and screw speed is 500 revs/min；
(5) liquid nitrogen is sprayed to the casting of step (4) in freezing chamber, makes its rapid cooling, is then freezed in freezing chamber
Solidification 8 hours；
(6) then the freezing casting for taking out step (5) is rinsed then with being dried with nitrogen with high-temperature vapor, high temperature
Steam temperature is 280-300 DEG C, and then then naturally dry is packed to get finished product.
Embodiment 4
(1) by by 6 parts of bismuth meal, 4 parts of bismuthine, 6 parts of water chestnut bismuth mineral, 10 parts of iron oxide, 6 parts of manganese oxide, 5 parts of copper powder combination
Magnetic material mixture and by 8 parts of artificial schellite, 9 parts of boron nitride, 3 parts of sodium tripolyphosphate, 6 parts of thiodipropionic acid dilauryl cinnamic acid ester,
The non-magnetic mixtures of 10 parts of kaolin compositions are uniformly mixed respectively, are separately added into wet ball mill and are ground 24 hours,
Obtained Magnaglo and nonmagnetic powder mixture is sieved sorting respectively, and it is 98 that wherein the parameter of wet ball-milling, which is ratio of grinding media to material:
1, ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are carried out at freeze-drying respectively
Reason, obtained magnetic product and non magnetic product are saved backup in -80 DEG C, wherein freeze-drying parameter is -30 DEG C of cryogenic temperature,
Freeze pressure 25Pa, cooling time 2 hours；
(3) by 10 parts of 2- mercapto benzimidazole, 7 parts of isopropanolamine, 6 parts of polycarbonate, propylene glycol methyl ether acetate 8
Part, 5 parts of dibutyl tin dilaurate, mixing are added to electric arc furnaces, carry out melting reaction, and temperature is increased to 200 DEG C, heat preservation
Reaction 90 minutes is added magnetic product and non magnetic product in step (2), stirs evenly after being naturally cooling to 150 DEG C or less
After be warming up to 220-225 DEG C, while being vacuumized in electric arc furnaces, vacuum pressure is 50Pa hereinafter, sustained response 5 hours, is then dropped
Temperature keeps the temperature 36 hours to 80-85 DEG C, spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3), wherein double spiral shells
Bar extruder parameter is that extruder temperature is 260 DEG C, and screw speed is 500 revs/min；
(5) liquid nitrogen is sprayed to the casting of step (4) in freezing chamber, makes its rapid cooling, is then freezed in freezing chamber
Solidification 10 hours；
(6) then the freezing casting for taking out step (5) is rinsed then with being dried with nitrogen with high-temperature vapor, high temperature
Steam temperature is 280-300 DEG C, and then then naturally dry is packed to get finished product.
Comparative example 1
(1) by by 3 parts of bismuth meal, 2 parts of bismuthine, 3 parts of water chestnut bismuth mineral, 3 parts of iron oxide, 3 parts of manganese oxide, 1 part of copper powder combination
Magnetic material mixture and by 2 parts of artificial schellite, 4 parts of boron nitride, 1 part of sodium tripolyphosphate, 2 parts of thiodipropionic acid dilauryl cinnamic acid ester,
The non-magnetic mixtures of 5 parts of kaolin compositions are uniformly mixed respectively, are separately added into wet ball mill and are ground 10 hours, obtain
To Magnaglo and nonmagnetic powder mixture be sieved respectively sorting, it is 98:1 that wherein the parameter of wet ball-milling, which is ratio of grinding media to material,
Ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill；
(2) by 5 parts of 2- mercapto benzimidazole, 1 part of isopropanolamine, 4 parts of polycarbonate, 3 parts of propylene glycol methyl ether acetate,
4 parts of propyl-triethoxysilicane, 2 parts of cadmium 2-ethylhexoate, mixing are added to electric arc furnaces, carry out melting reaction, and temperature increases
To 200 DEG C, insulation reaction 30 minutes, magnetic product and non magnetic production in step (1) are added after being naturally cooling to 150 DEG C or less
Object is warming up to 220-225 DEG C after mixing evenly, while vacuumizing in electric arc furnaces, and vacuum pressure is 50Pa hereinafter, sustained response 2
Hour, it is then cooled to 80-85 DEG C, keeps the temperature 24 hours, it is spare；
(3) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (2), wherein double spiral shells
Bar extruder parameter is that extruder temperature is 220 DEG C, and screw speed is 500 revs/min；
(4) liquid nitrogen is sprayed to the casting of step (3) in freezing chamber, makes its rapid cooling, is then freezed in freezing chamber
Solidification 5 hours；
(5) then the freezing casting for taking out step (4) is rinsed then with being dried with nitrogen with high-temperature vapor, high temperature
Steam temperature is 280-300 DEG C, and then then naturally dry is packed to get finished product.
Comparative example 2
(1) by by 6 parts of bismuth meal, 4 parts of bismuthine, 6 parts of water chestnut bismuth mineral, 10 parts of iron oxide, 6 parts of manganese oxide, 5 parts of copper powder combination
Magnetic material mixture and by 8 parts of artificial schellite, 9 parts of boron nitride, 3 parts of sodium tripolyphosphate, 6 parts of thiodipropionic acid dilauryl cinnamic acid ester,
The non-magnetic mixtures of 10 parts of kaolin compositions are uniformly mixed respectively, are separately added into wet ball mill and are ground 24 hours,
Obtained Magnaglo and nonmagnetic powder mixture is sieved sorting respectively, and it is 98 that wherein the parameter of wet ball-milling, which is ratio of grinding media to material:
1, ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are carried out at freeze-drying respectively
Reason, obtained magnetic product and non magnetic product are saved backup in -80 DEG C, wherein freeze-drying parameter is -30 DEG C of cryogenic temperature,
Freeze pressure 25Pa, cooling time 2 hours；
(3) by 10 parts of 2- mercapto benzimidazole, 7 parts of isopropanolamine, 6 parts of polycarbonate, propylene glycol methyl ether acetate 8
Part, 5 parts of dibutyl tin dilaurate, mixing are added to electric arc furnaces, carry out melting reaction, and temperature is increased to 200 DEG C, heat preservation
Reaction 90 minutes is added magnetic product and non magnetic product in step (2), stirs evenly after being naturally cooling to 150 DEG C or less
After be warming up to 220-225 DEG C, while being vacuumized in electric arc furnaces, vacuum pressure is 50Pa hereinafter, sustained response 5 hours, is then dropped
Temperature keeps the temperature 36 hours to 80-85 DEG C, spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3), wherein double spiral shells
Bar extruder parameter is that extruder temperature is 260 DEG C, and screw speed is 500 revs/min；
(5) by the casting of step (4) at room temperature spontaneous curing 10 hours；
(6) it to the casting of step (5), then with being dried with nitrogen, is then rinsed with high-temperature vapor, high-temperature vapor
Temperature is 280-300 DEG C, and then then naturally dry is packed to get finished product.
The doping bismuth element magnetic material obtained of embodiment 1-4 and comparative example 1-2 is subjected to initial permeability, magnetic respectively
This several core consume, heat dissipation effect performance tests, test result are shown in Table 1.
Table 1
The preparation method of doping bismuth element magnetic material of the invention is by bismuth meal, bismuthine, water chestnut bismuth mineral, iron oxide, oxidation
The magnetic material and artificial schellite, boron nitride, sodium tripolyphosphate, thiodipropionic acid dilauryl cinnamic acid ester, kaolin group that manganese, copper powder combine
At non-magnetic material 2- mercapto benzimidazole, isopropanol are added after wet ball grinding and freeze-drying process respectively
The raw materials such as amine, polycarbonate, propylene glycol methyl ether acetate, propyl-triethoxysilicane, stabilizer reaction, then respectively by ladder
Degree melting, twin-screw extrusion, mold, liquid nitrogen rapid cooling, freezing solidifies, is dried with nitrogen, high-temperature vapor washs, naturally dry
And etc. be prepared doping bismuth element magnetic material.The doping bismuth element magnetic material being prepared, electromagnetic performance is excellent,
Heatproof moisture-proof anti-seismic performance is good, can satisfy a variety of demands in industry.Doping bismuth element magnetic material raw material of the invention is easy
It obtains, simple process, is suitable for heavy industrialization and uses, it is practical.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (7)
1. a kind of preparation method for adulterating bismuth element magnetic material, which comprises the following steps:
It (1) will be by 3-6 parts of bismuth meal, 2-4 parts of bismuthine, 3-6 parts of water chestnut bismuth mineral, 3-10 parts of iron oxide, 3-6 parts of manganese oxide, copper powder 1-5
Part combination magnetic material mixture and by 2-8 parts of artificial schellite, 4-9 parts of boron nitride, 1-3 parts of sodium tripolyphosphate, thio-2 acid
2-6 parts of dilaurate, 5-10 parts of the kaolin non-magnetic mixtures formed are uniformly mixed respectively, are separately added into wet type ball
It is ground in grinding machine 10-24 hours, obtained Magnaglo and nonmagnetic powder mixture are sieved sorting respectively；
(2) Magnaglo mixture and nonmagnetic powder mixture that step (1) obtains are subjected to freeze-drying process respectively, obtained
To magnetic product and non magnetic product save backup in -80 DEG C；
(3) by 5-10 parts of 2- mercapto benzimidazole, 1-7 parts of isopropanolamine, 4-6 parts of polycarbonate, propylene glycol methyl ether acetate
3-8 parts, 4-9 parts of propyl-triethoxysilicane, 2-5 parts of stabilizer, mixing are added to electric arc furnaces, carry out melting reaction, temperature
Be increased to 200 DEG C, insulation reaction 30-90 minutes, be added after being naturally cooling to 150 DEG C or less the magnetic products in step (2) and
Non magnetic product is warming up to 220-225 DEG C after mixing evenly, while vacuumizing in electric arc furnaces, and sustained response 2-5 hours, then
It is cooled to 80-85 DEG C, keeps the temperature 24-36 hours, it is spare；
(4) it will be melted, squeezed out to mold in the product injection parallel double-screw extruder of step (3)；
(5) liquid nitrogen is sprayed to the casting of step (4) in freezing chamber, makes its rapid cooling, solidification is then freezed in freezing chamber
5-10 hours；
(6) then the freezing casting for taking out step (5) is rinsed, naturally dry then with being dried with nitrogen with high-temperature vapor
Then it packs to get finished product.
2. a kind of preparation method for adulterating bismuth element magnetic material according to claim 1, which is characterized in that the step
(1) it is 98:1 that the parameter of wet ball-milling, which is ratio of grinding media to material, in, and ball-milling medium is ethylene glycol, 1500 revs/min of rotational speed of ball-mill.
3. a kind of preparation method for adulterating bismuth element magnetic material according to claim 1, which is characterized in that the step
(2) in freeze-drying parameter be -30 DEG C of cryogenic temperature, freeze pressure 25Pa, cooling time 2 hours.
4. a kind of preparation method for adulterating bismuth element magnetic material according to claim 1, which is characterized in that the step
(3) stabilizer in is selected from one of cadmium 2-ethylhexoate, barium laurate, zinc naphthenate, dibutyl tin dilaurate or several
Kind.
5. a kind of preparation method for adulterating bismuth element magnetic material according to claim 1, which is characterized in that the step
(3) vacuum pressure in is 50Pa or less.
6. a kind of preparation method for adulterating bismuth element magnetic material according to claim 1, which is characterized in that the step
(4) it is 220-260 DEG C that the double screw extruder parameter in, which is extruder temperature, and screw speed is 500 revs/min.
7. a kind of preparation method for adulterating bismuth element magnetic material according to claim 1, which is characterized in that the step
(6) the high-temperature vapor temperature in is 280-300 DEG C.
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