CN101325108B - Agglutinate neodymium-iron-boron magnet and preparation method thereof - Google Patents
Agglutinate neodymium-iron-boron magnet and preparation method thereof Download PDFInfo
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- CN101325108B CN101325108B CN200810052612XA CN200810052612A CN101325108B CN 101325108 B CN101325108 B CN 101325108B CN 200810052612X A CN200810052612X A CN 200810052612XA CN 200810052612 A CN200810052612 A CN 200810052612A CN 101325108 B CN101325108 B CN 101325108B
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Abstract
The invention relates to a Nd-Fe-B bonded magnet, which comprises Nd-Fe-B magnetic powder, thermosetting resin, a curing agent, an accelerant and a lubricant, and is characterized in that nano silicon dioxide is added to the Nd-Fe-B bonded magnet as a reinforcing agent, the content of the added weight is 0.01 to 1.0 percent of the weight of the magnetic powder, the thermosetting resin, the curing agent, the accelerant, the nano silicon dioxide, the lubricant and an organic solvent are intensively mixed, the intensively mixed resin solution and the magnetic powder are intensively mixed under the protection of the inert gas, the solvent is removed by heating and pressure reducing to obtain the magnetic powder-resin mixture containing the nano silicon dioxide, and the Nd-Fe-B bonded magnet can be achieved through pressing and thermosetting processing. The Nd-Fe-B bonded magnet has advantageous mechanical strength, and also has good magnetic property, mold unloading property and dimension precision.
Description
Technical field
The present invention relates to the neodymium iron boron magnetic body field, particularly a kind of Agglutinate neodymium-iron-boron magnet and preparation method thereof.
Background technology
Agglutinate neodymium-iron-boron magnet has good magnetic property, is that components such as NdFeB magnetic powder and binding resin are mixed, and its extrusion forming is the mixture of desired magnet shape.Its main component comprises NdFeB magnetic powder that magnetic property is provided and as the thermosetting resin of binding agent, and function additive such as curing agent, promoter, coupling agent, lubricant.Wherein, the intensity of magnet is mainly derived from the resin-based as binding agent, but the mixture that only comprises magnetic and thermosetting resin generally can not obtain good formability, therefore, in Japanese patent application H11-045816, the metallic soap of application examples such as calcium stearate and zinc stearate is as lubricant, increase formability, when in mixture, adding the lubricant of for example aforesaid calcium stearate and zinc stearate, mold filling ability (flowability, uniform fillable) and demoulding ability be improved, and powder density increases, but the mechanical strength of while product is because the adding deterioration of metallic soaps such as calcium stearate and zinc stearate is obvious.In Chinese patent application CN 1674166A, with N-lauroyl-L-lysine and N-lauroyl-aspartic acid as lubricant, the addition of 0.01-1.0wt% can obtain lubricant effect and the mechanical performance that is better than equal metallic soap series lubricant agent addition preferably, but, also can cause the deterioration of product mechanical performance inevitably with the increase of addition.In Japanese patent application 2000-036403, the degraded in mechanical properties that causes for fear of metallic soap class and amino acids lubricant, fluororesin is suggested and is used for interchangeable lubricant, and stand not melt when hot curing is handled at green compact, therefore have the advantage that stops products obtained therefrom mechanical strength deterioration, but have the defective of aspects such as technology and properties of product.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology, a kind of Agglutinate neodymium-iron-boron magnet and preparation method thereof is provided, by adding nano silicon mutually to binding resin, utilize the physics of nano particle to strengthen toughening effect and silica surface group participation curing coupling reaction, under the prerequisite that does not influence its formability and other performance, improved the mechanical strength of product.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A kind of Agglutinate neodymium-iron-boron magnet, comprise NdFeB magnetic powder, thermosetting resin, curing agent, promoter, lubricant, it is characterized in that adding nano silicon as reinforcing agent in Agglutinate neodymium-iron-boron magnet, the weight content of adding is the 0.01%-1.0% of magnetic, is preferably 0.03%-0.2%.
The particle mean size size of described NdFeB magnetic powder is in 30-200 purpose scope, preferred 40-100 order; Described thermosetting resin is bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol-s epoxy resin, bisphenol-A epoxy resin, linear phenol aldehyde type epoxy resin, halogenated epoxy resin, multiple functional radical glycidyl ether resin and multiple functional radical epihydric alcohol amine resin, bisphenol A type epoxy resin and the linear phenolic epoxy resin of preferred (EEW) epoxide equivalent 300-800, the present invention has selected commercial D.E.R for use
TM633UE, EPON 840, D.E.R
TM642U-20 epoxy resin; Described curing agent can be aliphatic amine, polyamide, aliphatic cyclic amine, organic acid anhydride class and the dicyandiamide class decentralized curing agent of hiding, the preferred dicyandiamide decentralized curing agent of hiding, and its consumption is according to waiting molar equivalent principle to calculate; Described promoter can be for having fine synergistic ureas or imidazole derivative with dicyandiamide, as 3-(3, the 3-dichlorophenyl)-1,1-dimethyl urea [molecular formula: C
6H
3Cl
2-NH-CO-N (CH
3)
2], N, N " (4-methyl isophthalic acid, 3-phenylene) two [N ', N '-dimethyl urea] [molecular formula: H
3C-C
6H
3[NH-CO-N (CH3)
2]
2], N, N-dimethyl-N '-phenylurea [molecular formula: C
6H
5-NH-CO-N (CH
3)
2], glyoxal ethyline, one of 2-phenylimidazole or its mixture, its consumption are 0.05-3.0 times of curing agent weight, are preferably 0.1-1.0 times of curing agent weight.The weight content of thermosetting resin is the 0.5%-10.0% of magnetic, preferred 1.0-4.0%.Described lubricant is that zinc stearate is the metallic soap of representative, and weight content is the 0-1.0% of magnetic, is preferably the 0.03%-0.2% of magnetic.Described nano silicon can be hydrophilic (without surface treatment) or hydrophobic type (OSi (CH
3)
2Or-OSi (CH
3)
3Surface treatment), average grain diameter is at 7-40nm, specific area 100-400m
2/ g, preferred 150-250m
2/ g is as a watt gram H
20And N
20Trade mark silicon dioxide.
The preparation method of Agglutinate neodymium-iron-boron magnet of the present invention is; thermosetting epoxy resin with above-mentioned consumption; curing agent; promoter; nano silicon and the lubricant and the organic solvent that add as required mix; under inert gas shieldings such as nitrogen or argon gas; the resin solution that utilizes planet mixer or other mixing apparatus to prepare in advance evenly mixed 15-60 minute with magnetic; used organic solvent can heat decompression synchronously and remove in mixed process; or heating decompression removal separately after mixing, can obtain Agglutinate neodymium-iron-boron magnet of the present invention magnetic-resin compound.Described solvent adopts acetone or oxolane or acetone: the mixed solvent of oxolane (weight ratio)=0.1-10, be preferably 0.5-2.0, and solvent load is 1-20 times (weight ratio) of resin demand, is preferably 4-10 doubly.Magnetic-the resin compound that contains nano silicon of gained can be pressed into column, ring-type, tabular, watt shape by in the mould that is filled to compacting shape machine, and the magnet green compact that size can be bigger or very small.The green compact that form are carried out constant temperature or the substep hot curing was handled 20-100 minute at 140-200 degree centigrade, and thermosetting is handled and can be carried out under inert gas shieldings such as nitrogen or argon gas, prevents the magnetic oxidation.
The beneficial effect that the present invention had:
The magnet that the magnetic-resin compound of interpolation nano silicon of the present invention is suppressed has favourable mechanical strength, and also fine aspect magnetic property, release property and precision size.
Embodiment
The present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1:
Weighing MQP-B 80mesh magnetic 10,000g, EPON 840 bisphenol A epoxide resins (epoxide equivalent EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3, the 3-dichlorophenyl)-1,1-dimethyl urea 1.831g, watt gram H
20Silicon dioxide 20g, acetone 1000g prepares resin solution with said components, utilize the planet mixer to mix under the nitrogen environment 15 minutes, utilize convection oven under 55 degrees celsius dry 120 minutes, remove acetone, obtain containing nanometer titanium dioxide silica magnetic particle-resin compound.Utilize the magnetic property of Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; Isothermal curing is 45 minutes under 170 degrees centigrade of nitrogen protections; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 2:
Weighing MQP-B 80mesh magnetic 10,000g, EPON 840 bisphenol A epoxide resins (EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3, the 3-dichlorophenyl)-1,1-dimethyl urea 1.831g, watt gram H
20Silica 1 0g, oxolane 1000g prepares resin solution with said components, utilize the planet mixer to mix under the nitrogen environment 15 minutes, utilize convection oven under 65 degrees celsius dry 120 minutes, remove oxolane, obtain magnetic-resin compound that nano silicon strengthens.Utilize the magnetic property of Lakeshore7312 VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; Isothermal curing is 45 minutes under 170 degrees centigrade of nitrogen protections; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 3:
Weighing MQP-B 80mesh magnetic 10,000g, EPON 840 bisphenol A epoxide resins (EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3, the 3-dichlorophenyl)-1,1-dimethyl urea 1.831g, watt gram H
20Silicon dioxide 3g, acetone: oxolane=1: 1wt% mixed solution 1000g, said components is prepared resin solution, utilize the planet mixer to mix under the nitrogen environment 15 minutes, utilize convection oven under 60 degrees celsius dry 120 minutes, remove solvent, obtain magnetic-resin compound that nano silicon strengthens.Utilize the magnetic property of Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; Isothermal curing is 45 minutes under 170 degrees centigrade of nitrogen protections; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Comparative Examples 1:
Weighing MQP-B 80mesh magnetic 10,000g, EPON 840 bisphenol A epoxide resins (EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3, the 3-dichlorophenyl)-1,1-dimethyl urea 1.831g, acetone 1000g, said components is prepared resin solution, utilize the planet mixer to mix under the nitrogen environment 15 minutes, utilize convection oven under 55 degrees celsius dry 120 minutes, remove solvent, obtain magnetic-resin compound that nano silicon strengthens.Utilize the magnetic property of Lakeshore 7312 VSM (Vibrating SampleMagnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; Isothermal curing is 45 minutes under 170 degrees centigrade of nitrogen protections; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 4:
Weighing MQP-11-7 80mesh magnetic 10,000g, D.E.R
TM633UE epoxy resin (EEW=740-800) 200g, dicy-curing agent 3.377g, N, N-dimethyl-N '-phenylurea 2.251g, glyoxal ethyline 1.126g, watt gram N
20Silicon dioxide 20g, zinc stearate 3g, acetone 1400g prepares resin solution with said components, utilizes the planet mixer to mix 40 minutes, and at 55 degrees centigrade, acetone is removed in the 15KPa decompression, obtains magnetic-resin compound that nano silicon strengthens; Utilize the magnetic property of Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 200 degrees centigrade of isothermal curings 20 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 5:
Weighing MQP-11-7 80mesh magnetic 10,000g, D.E.R
TM633UE epoxy resin (EEW=740-800) 200g, dicy-curing agent 3.377g, N, N-dimethyl-N '-phenylurea 2.251g, glyoxal ethyline 1.126g, watt gram N
20Silica 1 0g, zinc stearate 3g, acetone 1400g prepares resin solution with said components, utilizes the planet mixer to mix 40 minutes, and at 55 degrees centigrade, acetone is removed in the 15KPa decompression, obtains magnetic-resin compound that nano silicon strengthens; Utilize the magnetic property of Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 200 degrees centigrade of isothermal curings 20 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 6:
Weighing MQP-11-7 80mesh magnetic 10,000g, D.E.R
TM633UE epoxy resin (EEW=740-800) 200g, dicy-curing agent 3.377g, N, N-dimethyl-N '-phenylurea 2.251g, glyoxal ethyline 1.126g, watt gram N
20Silicon dioxide 3g, zinc stearate 3g, acetone 1400g prepares resin solution with said components, utilizes the planet mixer to mix 40 minutes, and at 55 degrees centigrade, acetone is removed in the 15KPa decompression, obtains magnetic-resin compound that nano silicon strengthens; Utilize the magnetic property of Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into external diameter 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 200 degrees centigrade of isothermal curings 20 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Comparative Examples 2:
Weighing MQP-11-7 80mesh magnetic 10,000g, D.E.R
TM633UE epoxy resin (EEW=740-800) 200g, dicy-curing agent 3.377g, N, N-dimethyl-N '-phenylurea 2.251g, glyoxal ethyline 1.126g, zinc stearate 3g, acetone 1400g prepares resin solution with said components, utilize the planet mixer to mix 40 minutes, at 55 degrees centigrade, acetone is removed in the 15KPa decompression, obtains magnetic-resin compound that nano silicon strengthens; Utilize the magnetic property of Lakeshore 7312VSM (Vibrating Sample Magnetometer) tester test gained magnetic-resin compound; Utilize YA-20 type electric-liquid type pressure testing machine to investigate the knockout press of gained magnetic-resin compound; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 200 degrees centigrade of isothermal curings 20 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 7:
Weighing MQP-A 40mesh magnetic 10,000g, D.E.R
TM642U-20 novolac epoxy resin 400g, dicy-curing agent 9.811g, N, N " (4-methyl isophthalic acid, 3-phenylene) two [N ', N '-dimethyl urea] 0.654g, 2-phenylimidazole 0.327g, watt gram H
20Silicon dioxide 20g, acetone 1600g, said components is prepared resin solution, utilize the planet mixer to mix 60 minutes, at 55 degrees centigrade, acetone is removed in the 15KPa decompression, utilizes V-Mixer to mix the zinc stearate of 0.2wt% (20g) outward, magnetic-resin compound that the gained nano silicon strengthens utilizes Lakeshore 7312 VSM (Vibrating SampleMagnetometer) tester to test its magnetic property; Utilize YA-20 type electric-liquid type pressure testing machine to investigate its knockout press; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 140 degrees centigrade of isothermal curings 100 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 8:
Weighing MQP-A 40mesh magnetic 10,000g, D.E.R
TM642U-20 novolac epoxy resin 400g, dicy-curing agent 9.811g, N, N " (4-methyl isophthalic acid, 3-phenylene) two [N ', N '-dimethyl urea], 2-phenylimidazole 0.327g, watt gram H
20Silica 1 0g, acetone 1600g, said components is prepared resin solution, utilize the planet mixer to mix 60 minutes, at 55 degrees centigrade, acetone is removed in the 15KPa decompression, utilizes V-Mixer to mix the zinc stearate of 0.2wt% (20g) outward, magnetic-resin compound that the gained nano silicon strengthens utilizes Lakeshore 7312 VSM (Vibrating SampleMagnetometer) tester to test its magnetic property; Utilize YA-20 type electric-liquid type pressure testing machine to investigate its knockout press; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 140 degrees centigrade of isothermal curings 100 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Embodiment 9:
Weighing MQP-A 40mesh magnetic 10000g, D.E.R
TM642U-20 novolac epoxy resin 400g, dicy-curing agent 9.811g, N, N " (4-methyl isophthalic acid, 3-phenylene) two [N ', N '-dimethyl urea] 0.654g, 2-phenylimidazole 0.327g, watt gram H
20Silicon dioxide 3g, acetone 1600g, said components is prepared resin solution, utilize the planet mixer to mix 60 minutes, at 55 degrees centigrade, acetone is removed in the 15KPa decompression, utilizes V-Mixer to mix the zinc stearate of 0.2wt% (20g) outward, magnetic-resin compound that the gained nano silicon strengthens utilizes Lakeshore 7312VSM (Vibrating SampleMagnetometer) tester to test its magnetic property; Utilize YA-20 type electric-liquid type pressure testing machine to investigate its knockout press; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 140 degrees centigrade of isothermal curings 100 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
Comparative Examples 3:
Weighing MQP-A 40mesh magnetic 10,000g, D.E.R
TM642U-20 novolac epoxy resin 400g, dicy-curing agent 9.811g, N, N " (4-methyl isophthalic acid; 3-phenylene) two [N '; N '-dimethyl urea] 0.654g; 2-phenylimidazole 0.327g, acetone 1600g prepares resin solution with said components; utilize the planet mixer to mix 60 minutes; at 55 degrees centigrade, acetone is removed in the 15KPa decompression, utilizes V-Mixer to mix the zinc stearate of 0.2wt% (20g) outward, magnetic-resin compound that the gained nano silicon strengthens utilizes Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester to test its magnetic property; Utilize YA-20 type electric-liquid type pressure testing machine to investigate its knockout press; Utilize Gasbarre 15T press at 14ton/cm
2Be pressed into 20.80mm under the pressure, the annular magnet green compact of internal diameter 18.60mm; 110 degrees centigrade of precuring 5 minutes, 140 degrees centigrade of isothermal curings 100 minutes; The mechanical performance of utilizing the test of SV-55C-20H type pressure testing machine to solidify the gained magnet.
The magnetic property of embodiment 1-9 and Comparative Examples 1-3 gained magnetic-resin compound, and during the mechanical performance of obtained magnet, knockout press data all be listed in the table below:
Under the prerequisite of other compositions of mixture and term harmonization, adding weight content is the 0.03-0.20% nano silicon of magnetic, magnetic property and demolding performace is not almost had influence, and the mechanical performance that improves obtained magnet is had bigger help.
Claims (20)
1. Agglutinate neodymium-iron-boron magnet, comprise NdFeB magnetic powder, thermosetting resin, curing agent, promoter, lubricant, it is characterized in that adding nano silicon as reinforcing agent in Agglutinate neodymium-iron-boron magnet, the weight content of adding is the 0.01%-1.0% of magnetic.
2. Agglutinate neodymium-iron-boron magnet according to claim 1, the particle mean size size that it is characterized in that described NdFeB magnetic powder is in 30-200 purpose scope.
3. Agglutinate neodymium-iron-boron magnet according to claim 1, it is characterized in that described thermosetting resin is bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol-s epoxy resin, bisphenol-A epoxy resin, linear phenol aldehyde type epoxy resin, halogenated epoxy resin, multiple functional radical glycidyl ether resin and multiple functional radical epihydric alcohol amine resin.
4. Agglutinate neodymium-iron-boron magnet according to claim 1 is characterized in that described curing agent is aliphatic amine, polyamide, aliphatic cyclic amine, organic acid anhydride class and the dicyandiamide class decentralized curing agent of hiding, and its consumption is according to waiting molar equivalent principle to calculate; Described promoter is for to have fine synergistic ureas or imidazole derivative with dicyandiamide.
5. Agglutinate neodymium-iron-boron magnet according to claim 1 is characterized in that described accelerator dosage is 0.05-3.0 a times of curing agent weight.
6. Agglutinate neodymium-iron-boron magnet according to claim 1, the weight content that it is characterized in that described thermosetting resin is the 0.5%-10.0% of magnetic.
7. Agglutinate neodymium-iron-boron magnet according to claim 1 is characterized in that described lubricant is the metallic soap of calcium stearate and zinc stearate, and weight content is the 0-1.0% of magnetic.
8. Agglutinate neodymium-iron-boron magnet according to claim 1 is characterized in that described nano silicon is not surface treated hydrophilic or warp-OSi (CH
3)
2Or-OSi (CH
3)
3Surface-treated hydrophobic type, average grain diameter be at 7-40nm, specific area 100-400m
2/ g.
9. Agglutinate neodymium-iron-boron magnet according to claim 1 is characterized in that the weight content that described reinforcing agent adds is the 0.03%-0.2% of magnetic.
10. Agglutinate neodymium-iron-boron magnet according to claim 2, the particle mean size size that it is characterized in that described NdFeB magnetic powder is in 40-100 purpose scope.
11. Agglutinate neodymium-iron-boron magnet according to claim 3 is characterized in that described thermosetting resin is bisphenol A type epoxy resin and the linear phenol aldehyde type epoxy resin of epoxide equivalent 300-800.
12. Agglutinate neodymium-iron-boron magnet according to claim 4 is characterized in that described curing agent is the dicyandiamide decentralized curing agent of hiding.
13. Agglutinate neodymium-iron-boron magnet according to claim 4 is characterized in that described promoter is 3-(3, the 3-dichlorophenyl)-1,1-dimethyl urea [molecular formula: C
6H
3Cl
2-NH-CO-N (CH
3)
2], N, N " (4-methyl isophthalic acid, 3-phenylene) two [N ', N '-dimethyl urea] [molecular formula: H
3C-C
6H
3[NH-CO-N (CH
3)
2]
2], N, N-dimethyl-N '-phenylurea [molecular formula: C
6H
5-NH-CO-N (CH
3)
2], glyoxal ethyline, one of 2-phenylimidazole or its mixture.
14. Agglutinate neodymium-iron-boron magnet according to claim 5 is characterized in that described accelerator dosage is 0.1-1.0 a times of curing agent weight.
15. Agglutinate neodymium-iron-boron magnet according to claim 6, the weight content that it is characterized in that described thermosetting resin is the 1.0-4.0% of magnetic.
16. Agglutinate neodymium-iron-boron magnet according to claim 7, the weight content that it is characterized in that described lubricant is the 0.03%-0.2% of magnetic.
17. Agglutinate neodymium-iron-boron magnet according to claim 8, the specific area that it is characterized in that described nano silicon is 150-250m
2/ g.
18. the preparation method of the described Agglutinate neodymium-iron-boron magnet of claim 4; it is characterized in that thermosetting resin; curing agent; promoter; nano silicon and the lubricant and the organic solvent that add as required mix; the weight content of thermosetting resin is the 0.5%-10.0% of magnetic; the nano silicon weight content is the 0.01%-1.0% of magnetic; lubricant is the metallic soap of calcium stearate and zinc stearate; weight content is the 0-1.0% of magnetic; accelerator dosage is 0.05-3.0 a times of curing agent weight; described organic solvent adopts acetone or oxolane or acetone: the mixed solvent of oxolane (weight ratio)=0.1-10; consumption of organic solvent is 1-20 times (weight ratio) of resin demand; under nitrogen or argon gas inert gas shielding; utilize planet mixer or other mixing apparatus that resin solution and the magnetic that mixes mixed; the heating decompression synchronously in mixed process of used organic solvent is removed; or after mixing, add heat abstraction separately; magnetic-the resin compound that contains nano silicon of gained is by in the mould that is filled to compacting shape machine; be pressed into column; ring-type; tabular; watt shape; and size is bigger or very small magnetic green compact; 140-200 degree centigrade is carried out hot curing and handled 20-100 minute; with the cured thermoset resin, promptly obtain Agglutinate neodymium-iron-boron magnet.
19. the preparation method of Agglutinate neodymium-iron-boron magnet according to claim 18 is characterized in that described consumption of organic solvent is 4-10 times (weight ratio) of resin demand.
20. the preparation method of Agglutinate neodymium-iron-boron magnet according to claim 18 is characterized in that described organic solvent is an acetone: the mixed solvent of oxolane (weight ratio)=0.5-2.0.
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| CN102568730A (en) * | 2010-12-31 | 2012-07-11 | 上海爱普生磁性器件有限公司 | High mechanical strength bonding neodymium iron boron permanent magnet and preparation method thereof |
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| CN102942886B (en) * | 2012-11-16 | 2015-02-11 | 明尼苏达矿业制造特殊材料（上海）有限公司 | Magneto-conductivity gluewater and application thereof |
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| CN110467796A (en) * | 2019-08-15 | 2019-11-19 | 东莞市海天磁业股份有限公司 | Anisotropic magnet powder bonding uses magnetic particle colloid |
| CN113410019A (en) * | 2021-06-30 | 2021-09-17 | 安徽恒磁磁电有限公司 | Shock-resistant corrosion-resistant bonded neodymium iron boron magnet and preparation method thereof |
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