Ring Bonded NdFeB Magnet
- PRODUCT DETAIL
Size: Customised
Shape: Ring
Coating: Epoxy
Grade: BNP-6-BNP-12L
Tolerance: +/-0.03mm to +/-0.15mm
Material: NdFeB Magnet
Trademark: Actility
Transport Package: Carton
Specification: Customised
Origin: Zhejiang, China
HS Code: 8505111000
Bonded NdFeB magnet, composed of Nd2Fe14B, is a synthetic magnet. Bonded neodymium iron boron magnets are magnets made by “press molding” or “injection molding” by mixing fast-quenched NdFeB magnetic powder and binder. Bonded magnets have high dimensional accuracy, can be made into magnetic components with relatively complex shapes, and have the characteristics of one-time molding and multi-pole orientation. The bonded neodymium iron boron has high mechanical strength and can be formed with other supporting components at one time during forming.
China Bonded Magnet Manufacturer www.rizinia.com supplies Bonded NdFeB Magnet for scientific experiments or for industrial applications, in kinds of materials such as NdFeB/NIB/neodymium iron boron, etc.
This product is not a toy and is not to be used by children.
Advantages of
ing bonded NdFeB magnet
Bonded NdFeB magnets have extremely high dimensional accuracy, good magnetic uniformity and consistency, can be made into complex shapes that are difficult to achieve on sintered NdFeB magnets, and are easy to integrate with other metal or plastic parts. Bonded NdFeB magnets are also characterized by various magnetization methods, low eddy current loss and strong corrosion resistance.
Application fields of ring bonded NdFeB magnet
NdFeB bonded permanent magnetic material is made by adding NdFeB magnetic powder into a binder. Since the successful development of this material in 1988, its development has been quite rapid, and its output has doubled. As a high-performance permanent magnet material, it conforms to the trend of short-term, small, light and thin development of contemporary electronic products.
The production and application development of bonded neodymium iron boron permanent magnet materials are relatively late, and the application range is not wide, and the amount is small. They are mainly used in office automation equipment, electrical machinery, audio-visual equipment, instrumentation, small motors and measuring machinery, and mobile phones , CD-ROM, DVD-ROM drive motors, hard disk spindle motors HDD, other micro DC motors and automation instrumentation and other fields are widely used. In recent years, the application ratio of bonded NdFeB permanent magnet materials in my country is: 62% for computers, 7% for electronics industry, 8% for office automation equipment, 7% for automobiles, 7% for appliances, and 9% for others.
Bonded NdFeB magnet VS sintered NdFeB magnet
Craftsmanship
Bonded NdFeB is made by adding NdFeB magnetic powder into a binder; Sintered NdFeB magnet
Sintered neodymium iron boron adopts powder metallurgy technology, and the smelted alloy is made into powder and pressed in a magnetic field.
Magnetization orientation
Bonded magnets are isotropic, that is, regardless of magnetization in any direction, the magnetic field strength is the same (also related to the shape).
Sintered magnets are anisotropic. In the production process of sintered magnets, there is a process called magnetic field orientation. When magnetizing, it can only be magnetized along the orientation direction to have high magnetic field strength. There is no magnetism.
Theoretically speaking, the isotropic remanence is one-half of the anisotropic remanence. Since the magnetic energy product is proportional to the square of the remanence, the isotropic magnetic performance is only a quarter of the anisotropic magnetic performance. one.
Density
Bonded NdFeB magnets contain adhesives, and their density is generally only 80% of the theoretical density, usually 6g/cm³. Therefore, the magnetic properties of the bonded magnets will be attenuated by about 30%.
The density of sintered NdFeB magnet is basically close to the theoretical density, usually 7.5g/cm³, with little attenuation.
Magnetic properties
Taken together, the magnetic properties of bonded NdFeB magnets are only about one-fifth of sintered magnets.
At present, the magnetic energy product of sintered NdFeB magnets can reach more than 50M, while bonded magnets are generally below 10M, and the best is only 12M.
The performance of the magnetic powder used in the bonded magnet is generally 15M, and it is only 10.5M after being made into the bonded magnet.
Forming
Sintered NdFeB magnets are relatively brittle and difficult to process into various complex shapes.
Bonded NdFeB can be formed at one time without secondary processing and can be made into various complex shapes.
Price
Bonded NdFeB magnets are much cheaper than sintered NdFeB magnets.
Surface
Bonded NdFeB magnet has strong oxidation resistance and does not require surface treatment. Sintered NdFeB magnets are easy to oxidize and require surface treatment for electroplating or coating.
| Typical Magnetic Properties of Ring Bonded NdFeB Magnet | ||||||||
| Grade |
Remanence Br T(Gs) |
Coercivity HCB KA/m(KOe) |
Intrinsic Coercivity Hcj KA/m(Koe) |
Max. Energy Product BH(max) KJ/m3(MGOe) |
Density g/cm3 |
Relative Recoil Permeability µr |
Temperature Coefficient
of Remanenceα Br %/ ℃ |
Max Operating
Temperature Tw /℃ |
| BNP-6 | 0.55~0.62 |
285~370 (3.6~4.6) |
600~755 (7.5~9.5) |
44~56 (5.5~7.0) |
5.5~6.1 | 1.15 | -0.13 | 100 |
| BNP-8L | 0.60~0.64 |
360~400 (4.5~5.0) |
715~800 (9~10) |
56~64 (7.0~8.0) |
5.6~6.1 | 1.15 | -0.13 | 100 |
| BNP-8 | 0.62~0.69 |
385~445 (4.8~5.6) |
640~800 (8~10) |
64~72 (8.0~9.0) |
5.6~6.1 | 1.15 | -0.13 | 120 |
| BNP-8SR | 0.62~0.66 |
410~465 (5.2~5.8) |
880~1120 (11~14) |
64~72 (8.0~9.0) |
5.6~6.1 | 1.13 | -0.13 | 150 |
| BNP-8H | 0.61~0.65 |
410~445 (5.2~5.7) |
1190~1440 (15~18) |
64~72 (8.0~9.0) |
5.9~6.2 | 1.15 | -0.07 | 125 |
| BNP-9 | 0.65~0.70 |
400~440 (5.0~5.5) |
640~800 (8~10) |
70~76 (8.8~9.5) |
5.6~6.1 | 1.22 | -0.12 | 120 |
| BNP-10 | 0.68~0.72 |
420~470 (5.3~5.9) |
640~800 (8~10) |
76~84 (9.5~10.5) |
5.6~6.1 | 1.22 | -0.11 | 120 |
| BNP-11 | 0.70~0.74 |
445~480 (5.6~6.0) |
680~800 (8.5~10) |
80~88 (10~11) |
5.6~6.1 | 1.22 | -0.11 | 120 |
| BNP-11L | 0.70~0.74 |
400~440 (5.0~5.5) |
520~640 (6.5~8) |
78~84 (9.8~10.5) |
5.6~6.1 | 1.26 | -0.11 | 110 |
| BNP-12L | 0.74~0.80 |
420~455 (5.3~5.7) |
520~600 (6.5~7.5) |
84~92 (10.5~11.5) |
5.6~6.1 | 1.26 | -0.08 | 110 |
Typical Magnetic Properties of Ring Bonded NdFeB Magnet
|
||||||||
| Grade |
Remanence Br T(GS) |
Coercivity Hcb KA/m(KOe) |
Intrinsic Coercivity Hcj KA/m(Koe) |
Max. Energy Product BH (max KJ/m3(MGOe) |
Density g/cm3 |
Relative Recoil Permeability µr |
Temperature Coefficient of Remanence αBr %/℃ |
Max. Operating Temperature Tw /℃ |
| BNI-3 | 0.2~0.4 |
120~240 (1.5~3.0) |
480~640 (6.0~8.0) |
8~24 (1.0~3.0) |
3.9~4.4 | 1.2 | -0.15 | 100 |
| BNI-4 | 0.40~0.46 |
250~335 (3.1~4.2) |
575~735 (7.2~9.2) |
28~36 (3.5~4.5) |
4.2~4.9 | 1.2 | -0.13 | 110 |
| BNI-5 | 0.45~0.51 |
280~360 (3.5~4.5) |
640~800 (8~10) |
37~44 (4.6~5.5) |
4.5~5.0 | 1.2 | -0.13 | 120 |
| BNI-6 | 0.51~0.56 |
295~375 (3.7~4.7) |
640~800 (8~10) |
44~52 (5.5~6.5) |
4.7~5.1 | 1.13 | -0.11 | 120 |
| BNI-6H | 0.48~0.56 |
335~400 (4.2~5.0) |
1035~1355 (13~17) |
40~52 (5.0~6.5) |
4.8~5.2 | 1.13 | -0.15 | 130 |
| BNI-7 | 0.54~0.64 |
320~400 (4.0~5.0) |
640~800 (8~10) |
51~59 (6.5~7.5) |
5.0~5.5 | 1.13 | -0.11 | 120 |
| BNI-5SR (PPS) | 0.45~0.50 |
300~360 (3.8~4.5) |
875~1115 (11~14) |
36~44 (4.5~5.5) |
4.9~5.4 | 1.13 | -0.13 | 150 |
| Coatings of Rare Earth Magnets | ||||
| 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. |
