Product Description
Overview of Sintered Neodymium Magnets
Sintered Neodymium Magnets are permanent rare earth magnets made
from neodymium, iron and boron that are sintered together in a
process to form a strong and durable magnet. Due to their high
coercivity and strong magnetic properties, these rare earth magnets
are ideal for a variety of applications such as new energy cars,
wind power generation, servo motors, traction motors, and more.
Available grades range from N35 to N52, 35M to 50M, 35H to 48H, and
30SH to 45SH. The material used for these magnets is a powerful
combination of neodymium, iron and boron, and they are available
with a variety of coatings such as nickel, NiCuNi, zinc, epoxy and
more. Our sintered neodymium magnets are certified with ISO9001,
IATF16949, and ISO14001. For the highest level of performance from
these magnets, these are the magnets you need. Our Sintered
Neodymium Magnets provide the highest level of performance and
dependability. With our sintered neodymium magnets, you can trust
that your applications will run smoothly and effectively.
Physical Properties of Sintered Neodymium Magnet
| Parameter Name | Parameter Values | Unit |
| Curie Temperature | 310～380 | ℃ |
| Relative Recoil Permeability | 1.02～1.05 | |
| Reversible Temperature Coefficient of Br (20~100℃) | -0.09～-0.13 | %/℃ |
| Reversible Temperature Coefficient of Hcj (20~100℃) | -0.4～-0.7 | %/℃ |
| Density | 7.50～7.70 | g/cm3 |
| Vickers Hardness | 550～700 | |
| Bending Strength | -0.09～-0.13 | MPa |
| Tensile Strength | ≥80 | MPa |
| Compressive Strength | 800 ~1050 | MPa |
| Electric Resistivity | 150 | μΩ·cm |
| Thermal Conductivity | 8～10 | W/(M·℃) |
Coefficient of Thermal Expansion
(Parallel to the orientation) | 5 | 10-6/K |
Coefficient of Thermal Expansion
(vertical to the orientation) | -1.5 | 10-6/K |
| Young's Modulus | 150～200 | GPa |
| Specific Heat(20℃～320℃) | 3.0～4.6 | J/(g·k) |
| weight loss(low weight loss products) | ≤2 | mg/cm2 |
Max. working temperature for different grade
| Grade | Working Temp |
| (L/D=0.7) |
| | | ℃ |
N
Series | N35~N52 | ≤80 |
M
Series | 38M~50M | ≤100 |
H
Series | 35H~48H | ≤120 |
SH
Series | 33SH~48SH | ≤150 |
UH
Series | 30UH~40UH | ≤180 |
EH
Series | 30EH~38EH | ≤200 |
Manufacturing process for magnets (outline)
| Mixing | 1.Mix the ingredients. |
| Melting | 2.Dissolve the mixture at high temperature and prepare an alloy. |
| Fine pulverization | 3.Turn the alloy into fine powder. |
| Molding in a magnetic field | 4.When pressing the fine powder, apply a magnetic field to it and
prepare
a molded product of powder with aligned directions of
magnetization. |
| Sintering and heat treatment | 5.Sinter the product at about 1,100℃, and then subject it to heat
treatment at
about 600℃ to increase its magnetic characteristics. |
| Processing | 6.Process the manufactured magnet base material and finish it into
the product shape. |
| Surface treatment | 7.Subject the product to surface treatment in order to make it
rustproof. |
| Magnetization | 8.Apply a magnetic field to give the magnet magnetism. |
Features
- Product Name: Sintered Neodymium Magnet
- Coating: Nickel, NiCuNi, Zinc, Epoxy, Etc
- Material: Neodymium Iron Boron (Rare Earth Magnets, Strong Magnets,
Neodymium Magnets)
- Certification: ISO9001, IATF16949, ISO14001
- Shape: Block, Arc, Ring, Customized Shape Magnet
- Magnetic Orientation: As Customization
Technical Parameters
| Parameter | Value |
|---|
| Material | Neodymium Iron Boron |
| Grade | N35-N52, 35M-50M, 35H-48H, 30SH-45SH... |
| Application | New Energy Cars,Wind Power Generation,Servo Motors,Traction Motors |
| Magnetic Orientation | As Customization |
| Coating | Nickel,NiCuNi,Zinc,Epoxy Etc |
| Shape | Block,Arc,Ring,Customized Shape Magnet |
| Certification | ISO9001, IATF16949, ISO14001 |
| Working Temperature | 80~220°C |
| Strong Magnets | Yes |
| Bar Magnet | Yes |
| Powerful Magnet | Yes |
| Permanent Magnet | Yes |
Applications
UNMAG's sintered neodymium magnet is a kind of permanent magnet
made of neodymium, iron and boron. It has the highest magnetic
energy product among all permanent magnet materials, excellent
corrosion resistance, excellent strength and stability, and it can
be used in a wide range of temperature and harsh environment. It is
widely used in various precision instruments, new energy cars, wind
power generation, servo motors, traction motors and other fields.
It has the advantages of high coercive force, strong magnetization
ability, high energy product, good temperature stability, low cost
and easy manufacturing process. It can be surface treated with
different coating, such as nickel, NiCuNi, zinc, epoxy, etc.,
according to customer's requirement. UNMAG's sintered neodymium
magnet is certified by ISO9001, IATF16949 and ISO14001. It is
packaged in a carton box and the delivery time is 20-25 days.
Other Characteristics
Tolearance Control
| Name | Dimension(mm) | Tolerance(mm) |
| Wall thickness | T≤10 | ±0.04 |
| 10<T≤30 | ±0.05 |
| 30<T≤50 | ±0.06 |
| Length | L≤10 | ±0.04 |
| 10<L≤30 | ±0.05 |
| 30<T≤50 | ±0.05 |
| L>50 | ±0.08 |
| Width | W>50 | ±0.05 |
| L>50 | W≥50 | ±0.08 |
Available size: L≤200mm,W≤100mm,T: 1.5~50mm,H3~60mm
Physical Properties & Application to Environment of the Coating
| Coating Material | Colour | Properties | Environment of Application | Thickness of
Coating layer |
| Zinc | Blue, Black and rainbow etc | Compact, Stable and Homogeneous | With reasonalbe capability of anticorrosion | 6um≤∮≤12 |
| Nickel-Copper-Nickel | White and black | Light and Stable | Suitable for higher corrosive environment | 15μm≤∮≤30pm |
| Phosphorization | Colorless or light gray | uniform thickness | short-term anticorrosion | - |
| Epoxy | Black and Gray | layer with certain luster, insurability | Suitable for higher corrosive environment | ≥15μm |
| Parylene | transparency | uniform thickness, density pinholes-free and insurability | Excellent capability of anticorrosion especially for small items | 0.1μm≤∮≤100pm |
| Ni+Cu+Epoxy | Black | Layer with certain luster | Excellent capability of | 10-30μm |
| anticorrosion. Suitable for |
| hostile environment |
| salt spray resistance>300hr |
| Al+Epoxy | Black | Layer with certain luster | Excellent capability of | 15-35μm |
| anticorrosion. Suitable for |
| hostile environment |
| salt spray resistance>650hr Widely used in new energy |
| auto magnets |
Customization
Sintered Neodymium Magnet
UNMAG's sintered neodymium magnets are rare earth magnets, made of
an alloy of neodymium, iron and boron. They are the strongest type
of permanent magnets and are used for a wide range of applications,
from motors and sensors to loudspeakers and magnetic assemblies.
- Brand Name: UNMAG
- Place of Origin: China
- Packaging Details: Carton Box
- Delivery Time: 20-25days
- Shape: Block,Arc,Ring,Customized Shape Magnet
- Certification: ISO9001, IATF16949, ISO14001
- Grade: N35-N52, 35M-50M, 35H-48H, 30SH-45SH...
- Coating: Nickel,NiCuNi,Zinc,Epoxy Etc
- Magnetic Orientation: As Customization
With strong neodymium magnets, UNMAG can provide high quality
sintered neodymium magnet for your needs and application. Our
magnets are made to strict quality standards and we guarantee them
to be defect-free. Our magnets are certified to ISO9001, IATF16949,
ISO14001 and RoHS standards.
Packing and Shipping
Packaging and Shipping of Sintered Neodymium Magnet:
The sintered neodymium magnet is packaged in a sealed plastic bag
and then placed in a cardboard box or wooden box for shipping. The
box is then sealed with tape to keep the magnet secure during
transportation.
When shipping the product, it is important to check the regulations
of the country of destination. Some countries may have restrictions
on the type and amount of magnets that can be shipped. It is
important to check the regulations prior to shipping to ensure
compliance with local laws.
For more magnetic properities of sintered neodymium magnet,Please
chick
here.
