Sintered Neodymium Magnet

Sintered Neodymium Magnet
Item No.: ndfeb

Sintered Neodymium Magnet

Professional Neodymium Magnet manufacturer and exporter in China. NdFeB Magnet.

We are professional Neodymium Magnet manufacturer and exporter in China. We can produce Neodymium Magnet (NdFeB magnet) according to your requirements. More types of Neodymium Magnet (NdFeB magnet), Sintered Neodymium Magnet (NdFeB magnet) wanted, please contact us right now.

General Introduction

Sintered Neodymium Magnet is one of the high performance rare earth permanent magnets, which use neodymium (Nd), iron (Fe), and boron (B) as their main ingredients and is susceptible to demagnetization when exposed to elevated temperatures. Neodymium magnet is a new kind of magnetic material developed with excellent magnetic characteristics. These magnets are extremely strong for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs. There are many grades which can stand high temperatures, but several factors will dictate the performance of the Neodymium magnet.

Neodymium Magnet can be used in sensors, motors, filter automobiles, magnetic holders, loudspeakers, wind generators, medical equipments etc.

Neodymium Magnets have the characteristics of :

* Super strong Br Resident induction. Excellent demagnetization resistance capability.

  Good Price relative to its high magnetic properties.

  Coating is needed for Neodymium Magnet

* Surface Treatment Method: Type Information
  Metallic Zinc, Nickel, Nickel + Nickel, Copper + Nickel,  Nickel + Copper + Nickel,
  Gold, Organic Epoxy, Nickel + Epoxy coating
 Temporary Surface:  Passivation
 Dimension Available

Sintered Neodymium Magnet (NdFeB magnet)s production process >>

What shapes can it be formed?              Neodymium Magnet

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Neodymium Magnet (NdFeB magnet) for motor, generator, driver in various specification Tile-shaped and special-shaped Neodymium Magnet (NdFeB magnet)

 

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Neodymium Magnet Blocks in various specification Neodymium Magnet products painted with epoxy resin

 

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Neodymium Magnet Rings in various specification Neodymium Magnet Cylinders in various specification

 

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Special Shape of Neodymium Magnet Rubber Coated Neodymium Magnet

 

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Special Shape of Neodymium Magnet QQMAG: Amazing Magnetic Sphere

 

Magnetic properties of Sintered Neodymium Magnet (NdFeB magnet):

Grade Remanence Coercive Force  Intrinsic
Coercive Force
Max. energy
product
Max.
Operating
Temperature
Br
mT
(kGs)
Hcb
kA/m
(kOe)
Hcj
kA/m
(kOe)
BH max kJ/m3
(MGOe)
Tw
N35 1170-1220 ≥ 868 ≥ 955 263-287 80 ℃
(11.7-12.2) ( ≥ 10.9) ( ≥ 12) (33-36)
N38 1220-1250 ≥ 899 ≥ 955 287-310 80 ℃
(12.2-12.5) ( ≥ 11.3) ( ≥ 12) (36-39)
N40 1250-1280 ≥ 907 ≥ 955 302-326 80 ℃
(12.5-12.8) ( ≥ 11.4) ( ≥ 12) (38-41)
N42 1280-1320 ≥ 915 ≥ 955 318-342 80 ℃
(12.8-13.2) ( ≥ 11.5) ( ≥ 12) (40-43)
N45 1320-1380 ≥ 923 ≥ 955 342-366 80 ℃
(13.2-13.8) ( ≥ 11.6) ( ≥ 12) (43-46)
N48 1380-1420 ≥ 923 ≥ 876 366-390 80 ℃
(13.8-14.2) ( ≥ 11.6) ( ≥ 12) (46-49)
N50 1400-1450 ≥ 796 ≥ 876 382-406 60 ℃
(14.0-14.5) ( ≥ 10.0) ( ≥ 11) (48-51)
N52 1430-1480 ≥ 796 ≥ 876 398-422 60 ℃
(14.3-14.8) ( ≥ 10.0) ( ≥ 11) (50-53)
30M 1080-1130 ≥ 796 ≥ 1114 223-247 100 ℃
(10.8-11.3) ( ≥ 10.0) ( ≥ 14) (28-31)
33M 1130-1170 ≥ 836 ≥ 1114 247-263 100 ℃
(11.3-11.7) ( ≥ 10.5) ( ≥ 14) (31-33)
35M 1170-1220 ≥ 868 ≥ 1114 263-287 100 ℃
(11.7-12.2) ( ≥ 10.9) ( ≥ 14) (33-36)
38M 1220-1250 ≥ 899 ≥ 1114 287-310 100 ℃
(12.2-12.5) ( ≥ 11.3) ( ≥ 14) (36-39)
40M 1250-1280 ≥ 923 ≥ 1114 302-326 100 ℃
(12.5-12.8) ( ≥ 11.6) ( ≥ 14) (38-41)
42M 1280-1320 ≥ 955 ≥ 1114 318-342 100 ℃
(12.8-13.2) ( ≥ 12.0) ( ≥ 14) (40-43)
45M 1320-1380 ≥ 995 ≥ 1114 342-366 100 ℃
(13.2-13.8) ( ≥ 12.5) ( ≥ 14) (43-46)
48M 1360-1430 ≥ 1027 ≥ 1114 366-390 100 ℃
(13.6-14.3) ( ≥ 12.9) ( ≥ 14) (46-49)
50M 1400-1450 ≥ 1033 ≥ 1114 382-406 100 ℃
(14.0-14.5) ( ≥ 13.0) ( ≥ 14) (48-51)
30H 1080-1130 ≥ 796 ≥ 1353 223-247 120 ℃
(10.8-11.3) ( ≥ 10.0) ( ≥ 17) (28-31)
33H 1130-1170 ≥ 836 ≥ 1353 247-271 120 ℃
(11.3-11.7) ( ≥ 10.5) ( ≥ 17) (31-34)
35H 1170-1220 ≥ 868 ≥ 1353 263-287 120 ℃
(11.7-12.2) ( ≥ 10.9) ( ≥ 17) (33-36)
38H 1220-1250 ≥ 899 ≥ 1353 287-310 120 ℃
(12.2-12.5) ( ≥ 11.3) ( ≥ 17) (36-39)
40H 1250-1280 ≥ 923 ≥ 1353 302-326 120 ℃
(12.5-12.8) ( ≥ 11.6) ( ≥ 17) (38-41)
42H 1280-1320 ≥ 955 ≥ 1353 318-342 120 ℃
(12.8-13.2) ( ≥ 12.0) ( ≥ 17) (40-43)
45H 1300-1360 ≥ 963 ≥ 1353 326-358 120 ℃
(13-13.6) ( ≥ 12.1) ( ≥ 17) (43-46)
48H 1370-1430 ≥ 995 ≥ 1353 366-390 120 ℃
(13.7-14.3) ( ≥ 12.5) ( ≥ 17) (46-49)
30SH 1080-1130 ≥ 804 ≥ 1592 223-247 150 ℃
(10.8-11.3) ( ≥ 10.1) ( ≥ 20) (28-31)
33SH 1130-1170 ≥ 844 ≥ 1592 247-271 150 ℃
(11.3-11.7) ( ≥ 10.6) ( ≥ 20) (31-34)
35SH 1170-1220 ≥ 876 ≥ 1592 263-287 150 ℃
(11.7-12.2) ( ≥ 11.0) ( ≥ 20) (33-36)
38SH 1220-1250 ≥ 907 ≥ 1592 287-310 150 ℃
(12.2-12.5) ( ≥ 11.4) ( ≥ 20) (36-39)
40SH 1240-1280 ≥ 939 ≥ 1592 302-326 150 ℃
(12.5-12.8) ( ≥ 11.8) ( ≥ 20) (38-41)
42SH 1280-1320 ≥ 987 ≥ 1592 318-342 150 ℃
(12.8-13.2) ( ≥ 12.4) ( ≥ 20) (40-43)
45SH 1320-1380 ≥ 1003 ≥ 1592 342-366 150 ℃
(13.2-13.8) ( ≥ 12.6) ( ≥ 20) (43-46)
28UH 1020-1080 (10.2-10.8) ≥ 764 ≥ 1990 207-231 180 ℃
( ≥ 9.6) ( ≥ 25) (26-29)
30UH 1080-1130 (10.8-11.3) ≥ 812 ≥ 1990 223-247 180 ℃
( ≥ 10.2) ( ≥ 25) (28-31)
33UH 1130-1170 ≥ 852 ≥ 1990 247-271 180 ℃
(11.3-11.7) ( ≥ 10.7) ( ≥ 25) (31-34)
35UH 1180-1220 ≥ 860 ≥ 1990 263-287 180 ℃
(11.8-12.2) ( ≥ 10.8) ( ≥ 25) (33-36)
38UH 1220-1250 ≥ 876 ≥ 1990 287-310 180 ℃
(12.2-12.5) ( ≥ 11.0) ( ≥ 25) (36-39)
40UH 1240-1280 ≥ 899 ≥ 1990 302-326 180 ℃
(12.5-12.8) ( ≥ 11.3) ( ≥ 25) (38-41)
28EH 1040-1090 ≥ 780 ≥ 2388 207-231 200 ℃
(10.4-10.9) ( ≥ 9.8) ( ≥ 30) (26-29)
30EH 1080-1130 (10.8-11.3) ≥ 812 ≥ 2388 223-247 200 ℃
( ≥ 10.2) ( ≥ 30) (28-31)
33EH 1130-1170 ≥ 836 ≥ 2388 247-271 200 ℃
(11.3-11.7) ( ≥ 10.5) ( ≥ 30) (31-34)
35EH 1170-1220 ≥ 876 ≥ 2388 263-287 200 ℃
(11.7-12.2) ( ≥ 11.0) ( ≥ 30) (33-36)
38EH 1220-1250 ≥ 899 ≥ 2388 287-310 200 ℃
(12.2-12.5) ( ≥ 11.3) ( ≥ 30) (36-39)
30AH 1080-1120 ≥ 812 ≥ 2785 223-255 220 ℃
(10.8-11.2) ( ≥ 10.2) ( ≥ 35) (28-32)
33AH 1120-1170 ≥ 812 ≥ 2785 247-271 220 ℃
(11.2-11.7) ( ≥ 10.2) ( ≥ 35) (31-34)

 

Physical and Mechanical Properties of Neodymium Magnet:

Thermal Conductivity 7.7 kcal/m-h-°C
Young’s Modulus 1.7 x 104 kg/mm²
Bending Strength 24 kg/mm²
Compressive Strength 80 kg/mm²
Electrical Resistivity 160 µ-ohm-cm/cm²
Density 7.4-7.55 g/cm³
Vickers Hardness 500 - 600

 

Available coatings for sintered Neodymium Magnet (NdFeB magnet):

Available Coatings:
Surface Coating Thickness
(Microns)
Color Resistance
Passivation   1 Silver Grey Temporary Protection
Nickel Ni+Ni 10-20 Bright Silver Excellent against Humidity
Ni+Cu+Ni
Zinc Zn 8-20 Bright Blue Good Against Salt Spray
C-Zn Shinny Color Excellent Against Salt Spray
Tin Ni+Cu+Sn 15-20 Silver Superior Against Humidity
Gold Ni+Cu+Au 10-20 Gold Superior Against Humidity
Copper Ni+Cu 10-20 Gold Temporary Protection
Epoxy Epoxy 15-25 Black, Red, Grey Excellent Against Humidity
& Salt Spray
Ni+Cu+Epoxy
Zn+Epoxy
Chemical Ni 10-20 Silver Grey Excellent Against Humidity
Parylene Parylene 5-20 Grey Excellent Against Humidity, Salt Spray. Superior Against Solvents, Gases, Fungi and Bacteria.
FDA Approved.

 

Magnetisation Direction of Magnet


1. Magnetised through depth
2. Axially magnetised
3. Magnetised through diameter*
4. Axially magnetised in segments
5. Radially magnetised 
6. Multipole magnetised in segments on the face
7. Multipole magnetised in segments on outside diamater*
8. Multipole magnetised in segments on inside diamater*
9. Magnetised laterally on the face
All available for magnet is isotropic or anisotropic except*

Production Flow of Neodymium Magnet:

1. Raw Material 2. Melting 3. Milling
4. Pressing 5. Vacuum Sintering 6. Machining
7. Coating 8. Magnetization 9. Final Inspection

 

Application of Neodymium Magnet:
1. Computers: VCM, Printers
2. Machinery: Magnetic separtors, Robots
3. Transportation: Levitation train, Electric vehicle
4. Medical Service: MRI, Magnetic-therapy devices
5. Energy: Genertator, Electric motor
6. Communication: Mobile telephone, Voice and data, Communication system
7. Electical Appliance: HiFi system, Air conditioner
8. Oil Chemical Industry: Magnetic vibrating device for reducing viscosity and condensation, Nuclear magnetic logging tools, Anti-waxer of oil wells

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