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Rainbow Magnet Ltd.
Rainbow Magnet Ltd.  

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Neodymium Iron Boron block magnet 

Price: 1.0~20.0 USD 
Payment Terms: T/T,L/C 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: RM-B09
Production Capacity: 100 ton/month
Delivery Date: 3 weeks
Shape: Block
Composite: NdFeB Magnet
material: Neodymium Iron Boron
Means of Transport: Ocean,Land
Packing: standard carton by sea or b...
Application: Industrial Magnet
Type: Permanent
Brand Name: Rainbow

Neodymium Iron Boron block magnets
Sintered Neo magnets have high Br,high Hcj,high (BH)max,and high stability,become the important material of world

NdFeB is a type of rare-earth permanent magnet. It is made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. This material is currently the strongest type of permanent magnet in the world.
Nd-Fe-B permanent magnet is manufactured in a wide range of shapes, sizes and grades according customer's demand.

permanent magnet block has a very high energy product and coercivity, can pick up 660 times of own weight of heavy objects.
The advantage is high cost-effective, with good mechanical properties, easy cutting; according customer's demand to manufacture in a wide range of shapes, sizes and grades.
The shortcoming is the low of the Curie temperature and the temperature characteristics, easy to rust, oxidation, Sintered NdFeB's surface is usually required for plating such as zinc, nickel, silver, gold, etc., can also be done phosphorus treatment or spray epoxy resin to slow down the oxidation rate.
Pls see the compare of the coating's results:
Commonly type of coating
Coating thickness(um)
Neutral
salt spray test
dark Ni
Cu
Shine Ni
Total
Single-layer Ni
25
25
24h
normal
Double-layer Ni
12
10
25
72h
better
Dark Ni-Cu–shine Ni
6.25
8.75
10
25
120h
excellent

See the follows Grade N Sintered permanent magnet block magnetic energy parameters
Grade
Residual Induction
Coercive Force
Intrinsic Coercive Force
Maximum Energy Product
Maximum Operating
Temperature
Br
Hcb
Hcj
(BH)max
Tw
T
KGS
KA/m
KOe
KA/m
KOe
KJ/m3
MGOe
N35
1.17-1.21
11.7-12.1
876-899
11.0-11.3
≥955
≥12
263-279
33-25
≤80
N38
1.22-1.26
12.2-12.6
876-923
11.0-11.6
≥955
≥12
287-303
36-38
≤80
N40
1.26-1.29
12.6-12.9
876-923
11.0-11.6
≥955
≥12
303-318
38-40
≤80
N42
1.30-1.33
13.0-13.3
876-926
11.0-11.6
≥955
≥12
318-334
40-42
≤80
N45
1.33-1.37
13.3-13.7
876-926
11.0-11.6
≥955
≥12
342-358
43-45
≤80
N48
1.36-1.42
13.6-14.2
876-926
11.0-11.6
≥955
≥12
358-382
45-48
≤80
N50
1.41-1.45
14.1-14.5
828-907
10.4-11.4
≥876
≥11
382-398
48-50
≤70
N52
1.44-1.48
14.4-14.8
828-907
10.4-11.4
≥876
≥11
394-414
49.5-52
≤70


For N grade Ndfeb,the Max Operating Temp is 80 degree
Nd-Fe-B permanent magnet with its excellent performance, abundant raw material and reasonable price is to be rapid development and wide application.
Also becoming increasingly popular across a wide range of novelty products for markets.

The use of electro-acoustic devices work:
Speakers, hearing aids, pickups, stereo headset, electro-acoustic sensors, telephone receiver,
Small size, light weight, good sound quality.
Multifunction and miniaturization of mobile phones, high-performance Ndfeb played a key role.

attached pic show the permanent magnet block with Zn coating:


bigPhoto
 Ms. Annie

Tel: 86-574-87840198
Fax: 86-574-87393806
Mobile: 86- 189 5744 9606
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Company Info

Rainbow Magnet Ltd. [China (Mainland)]


Business Type:Manufacturer
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

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