1.NdFeB magnet is mainly made of Neodymium、Iron and Boron,with excellent magnetic property、abundant raw material and reasonable prices,NdFeB Magnet can be used as an ideal magnet in mini-motor、Permanent magnetic resonance、sound device magnetic suspension system,magnetic transmission machine and iatrical apparatus and etc.For NdFeB,its surface is usually treatd with some special methods.The surface treatment method include Zine、Nickel、Tin、Silver、Gold plating、Phosphor and Spray Epoxy Resin etc.
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Physical Properties： |
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Temp.Coeff of |
Temp.Coeff of iHc: -0.60%℃ |
Density: |
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Electrical
Resistivity:144µQ/cm |
Vickers
Hardness: 600Hv |
Flexural Strength: 25kg/mm2 |
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Tensile Strength: 8.0kg/mm2 |
Coeff of Thermal
Expansion: 4*10-6/℃ |
Specific
Heat:0.12kCal/(kg.℃) |
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Poisson’s
Ratio: 0.24 |
Compressibility: |
Curie Temperature:310℃-340 |
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Thermal
Conductivity: 7.7kCal(m.h. ℃) |
Yong’s Modulus
1.6x1011N/m2 |
Rigidity 0.64N/ m2 |
| Magnetic Characteristic： | ||||||
| Material Code | Remanence | Coercivity force | Intrinsic coercivity force | Maximum energy product | Maximum operating temperature | |
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NdFeB
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| Br | bHC | iHc | (BH)max | TW | ||
| KGs | KOe | Koe | MGOe | |||
| N-30 | 10.8-11.5 | 9.8-10.5 | ≥12 | 28-31 | 80 | |
| N-33 | 11.3-11.7 | 10.0-11.1 | ≥12 | 31-33 | 80 | |
| N-35 | 11.7-12.3 | 10.7-12.0 | ≥12 | 33-36 | 80 | |
| N-38 | 12.1-12.7 | 11.1-12.4 | ≥12 | 36-39 | 80 | |
| N-40 | 12.5-13.1 | 11.5-12.8 | ≥12 | 38-41 | 80 | |
| N-42 | 12.9-13.5 | 11.5-13.2 | ≥12 | 40-43 | 80 | |
| N-43 | 13.0-13.3 | 10.5-11.0 | ≥12 | 41-43 | 80 | |
| N-45 | 13.3-13.9 | 11.5-13.6 | ≥12 | 43-46 | 80 | |
| N-48 | 13.7-14.3 | 11.5-14.0 | ≥12 | 46-49 | 80 | |
| N-33M | 11.3-11.9 | 10.3-11.6 | ≥14 | 31-33 | 80 | |
| N-35M | 11.7-12.3 | 10.7-12 | ≥14 | 33-36 | 80 | |
| N-38M | 12.1-13.1 | 11.1-12.4 | ≥14 | 36-39 | 80 | |
| N-40M | 12.5-13.2 | 11.5-12.8 | ≥14 | 38-41 | 80 | |
| N-42M | 12.9-13.5 | 11.9-13.2 | ≥14 | 40-43 | 80 | |
| N-45M | 13.3-13.9 | 12.3-13.6 | ≥14 | 43-46 | 80 | |
| N-27H | 10.2-11.0 | 9.6-10.5 | ≥17 | 25-28 | 100 | |
| N-30H | 10.9-11.5 | 9.9-11.2 | ≥17 | 28-31 | 100 | |
| N-33H | 11.3-11.9 | 10.3-11.6 | ≥17 | 31-34 | 100 | |
| N-35H | 12.1-12.3 | 10.7-12.0 | ≥17 | 33-36 | 100 | |
| N-40H | 12.5-13.1 | 11.5-12.8 | ≥17 | 38-41 | 100 | |
| N-42H | 12.9-13.5 | 11.9-13.2 | ≥17 | 40-43 | 100 | |
| N-27SH | 10.5-11.1 | 9.5-10.8 | ≥20 | 25-28 | 150 | |
| N-30SH | 10.9-11.5 | 9.9-11.2 | ≥20 | 28-31 | 150 | |
| N-33SH | 11.3-11.9 | 10.3-11.6 | ≥20 | 31-34 | 150 | |
| N-35SH | 11.7-12.3 | 10.7-12.0 | ≥20 | 33-36 | 150 | |
| N-38SH | 12.1-12.7 | 11.1-12.4 | ≥20 | 36-39 | 150 | |
| N-40SH | 12.5-13.1 | 11.5-12.8 | ≥20 | 38-41 | 150 | |
| N-25UH | 10.1-10.7 | 9.1-10.4 | ≥24 | 23-26 | 180 | |
| N-27UH | 10.5-11.1 | 9.5-10.8 | ≥24 | 25-28 | 180 | |
| N-30UH | 10.9-11.5 | 9.9-11.2 | ≥24 | 28-31 | 180 | |
| N-33UH | 11.3-11.9 | 10.3-11.6 | ≥24 | 31-34 | 180 | |
| N-35UH | 11.7-12.3 | 10.7-12.0 | ≥24 | 33-36 | 180 | |
Prduction Process:
Raw materials-->Burden-->Melting under vacuum-->Crushing-->Milling-->
Pressing in Magnetic Field-->Sintering & Tempering-->Machining
(Cutting,Drilling&etc.)-->Coating-->Inspection-->Packing
Types of Plating:
NdFeB usually need plating due to it is easy to rust, we treat NdFeB with
Zinc coating (blue passivated or yellow passivated), Nickel coating,
Nickel+Nickel coating, Nickel+Tin coating, Nickel+Copper+Nickel coating,
Nickel+Epoxy coating & Epoxy coating. With these special treatment, NdFeB
permanent magnets is not suitable to be installed into system without
further treatment. To protect uncoated magnets temporarily, eg., damp
transport or storage, passivation can be made against temporary
environmental influences, such as a rise in humidity.
Dimension Range:
At present,the dimension ranges for NdFeB sintered that we can meet
as follow:
The largest size:
disk: dia125x50mm
ring; dia125x115x50mm
block:150x100x50mm
The smallest size:
disk: dia1.2x0.5mm
ring;dia3.8x1.2x0.5mm
block:1.5x1.5x0.5mm
Notes:
We are researching and developing more high grade
NdFeB sintered continuingly,please feel free to contact us for any
question.
Magnets can be machined as per customers' requirements, you only need offer
us your drawings or your application, we can design according to your
requirements
2.Bonded NdFeB is produced by
composition of rare-earth NdFeB magnetic powders embedded in thermoplastic
and formed by injection moulding machining. It is hard, Non-brittle light
weight, plastic-like magnet, able to be moulded to varieties of shapes e.g.
thin ring, gears,arc-segments etc.
Magnetic Characteristics and Physical Properties of Bonded Nd-Fe-B
| Parameters/Specifications | JN-6 | JN-7 | JN-8 | JN-9 | JN-10 | JN-11 | JN-12 |
| Residual Magnetic Induction (Br) (mT) | 500~590 5.0~5.9 |
590～630
5.9～6.3 |
630～650
6.3～6.5 |
650～700
6.5～7.0 |
700～740
7.0～7.4 |
740～810
7.4～8.1 |
810～860
8.1～8.6 |
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Coercive force
(Hcb)(kA/m) |
320～400
4.0～5.0 |
400～424
5.0～5.3 |
424～440
5.3～5.5 |
440～464
5.5～5.8 |
440～464
5.5～5.8 |
424～480
5.3～6.0 |
424～480 |
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Intrinsic coercive
force (Hci) (kA/m) |
560～720
7.0～9.0 |
720～880
9.0～11.0 |
720～880
9.0～11.0 |
640～840
8.0～10.5 |
760～840
9.5～10.5 |
720～920
9.0～11.5 |
720～920
9.0～11.5 |
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Maximum energy product(BH)
max (kJ/m3) |
44～56
5.5～7.0 |
56～64
7.0～8.0 |
64～72
8.0～9.0 |
72～80
9.0～10.0 |
80～88
10.0～11.0 |
88～96
11.0～12.0 |
96～104
12.0～13.0 |
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Average reversible temperature coefficient (αBr) (%/℃)
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-0.10～-0.09
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-0.10～-0.09
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-0.10
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-0.10
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-0.10
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-0.10
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-0.10
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Recoil permeability (μr)(μH/m)
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1.20
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1.20
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1.20
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1.20
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1.20
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1.20
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1.20
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Maximum operating temperature
(Tw) (℃) |
150
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150
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150
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150
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130
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130
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140
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| Density ρ (g/cm3) | 5.3～5.8 | 5.3～6.0 | 5.7～6.0 | 5.8-6.1 | 5.9～6.2 | 6.0～6.3 | 6.0～6.3 |
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Production Process:Mixing raw
materials->Injection mould->Finishing surface treatment->Finalinspection->Final
products
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