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Rainbow Magnet Ltd.
Rainbow Magnet Ltd.  

Gold Index: 16481

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ultra low temperature coefficient magnets 

Price: 0.01~100.0 USD 
Payment Terms: T/T,L/C,WU 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: RM-S17
Production Capacity: 100TON/MONTH
Delivery Date: 7-30days
Type: Permanent
Brand Name: rainbow magnet
Means of Transport: Ocean,Air;experess
Packing: standard air cartons or sea...
Application: Speaker Magnet
Composite: Neodymium Magnet

High performance
Low temp. coefficient
Strong anti-causticity

Samarium cobalt magnets are composed of samarium, cobalt and iron. These rare earth magnets are extremely strong for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs.
According the composition, we divide two of SMCO: Sm2CO17 and SmCo5
According the process, we divide to sintered Smco and bonded Smco

Sm2Co17:
The (BH)max between 20-32, the maximum operating temperature can be reached 350 °C, the 2:17 has a low temperature coefficient (-0.02% / ℃) and good corrosion resistance, magnetic properties is more than NdFeB magnets when in high working temperatures,

Sm2co17: not only has a high intrinsic saturation magnetic induction, but also good anti-oxidation.
The Curie temperature is high to 840-870 degrees, higher than Smco5.
The disadvantage is that the process is complex with high costs.

From the products use, we can divide as follows:
1)ultra low temperature coefficient magnets,
2)high-temperature magnets,
3)radiation orientation and radiation multi-polar orientation of the ring magnets,
4)high electrical insulating magnets.
Pic showed the low temperature coefficient of the magnet: the part of the heavy rare earth elements instead of Sm can be manufactured with low temperature coefficient of the 2:17-type Sm-Co permanent magnet alloy, heavy rare earth elements such as: Ho, Er, Dy and Gd, and the heavy rare earth elements.

Applications
²aerospace fields,
²military fields,
²high temperature motor,
²automotive sensors,
²variety of magnetic drive,
²magnetic drive pump,
²microwave devices.
²Computer disc drives
²Sensors
²Radar
²Traveling wave tubes
² Satellite systems
²Motors where temporary stability is vital

Materials
Grade
Br (Residual induction)
Hcb (Coercive Force)
Hcj (Intrinsic coercive Force)
(BH)max. Max. Energy Product
Max. Operating Temp.
TC
Curie Temp.
(KGs)
(KOe)
(KOe)
(MGOe)
(°c)
(°c)
Sm2Co17
YXG-24H
9.5-10.2
8.7-9.6
≥25
22-24
350
800
Sm2Co17
YXG-26H
10.2-10.5
9.4-10.0
≥25
24-26
350
800
Sm2Co17
YXG-28H
10.3-10.8
9.5-10.2
≥25
26-28
350
800
Sm2Co17
YXG-30H
10.8-11.0
9.9-10.5
≥25
28-30
350
800
Sm2Co17
YXG-32H
11.0-11.3
10.2-10.6
≥25
29-32
350
800
Sm2Co17
YXG-22
9.3-9.7
8.5-9.3
≥18
20-23
300
800
Sm2Co17
YXG-24
9.5-10.2
8.7-9.6
≥18
22-24
300
800
Sm2Co17
YXG-26
10.2-10.5
9.4-10.0
≥18
24-26
300
800
Sm2Co17
YXG-28
10.3--10.8
9.5-10.2
≥18
26-28
300
800
Sm2Co17
YXG-30
10.8-11.0
9.9-10.5
≥18
28-30
300
800
Sm2Co17
YXG-32
11-11.3
10.2-10.7
≥18
29-32
300
800
Sm2Co17
YXG-26M
10.2-10.5
8.5-9.8
12-18
24-26
300
800
Sm2Co17
YXG-28M
10.3-10.8
8.5-10.0
12-18
26-28
300
800
Sm2Co17
YXG-30M
10.8-11.0
8.5-10.5
12-18
28-30
300
800
Sm2Co17
YXG-32M
11.0-11.3
8.5-10.6
12-18
29-32
300
800
Sm2Co17
YXG-24L
9.5-10.2
6.8-9.0
8-12
22-24
250
800
Sm2Co17
YXG-26L
10.2-10.5
6.8-9.4
8-12
24-26
250
800
Sm2Co17
YXG-28L
10.3-10.8
6.8-9.6
8-12
26-28
250
800
Sm2Co17
YXG-30L
10.8-11.5
6.8-10.0
8-12
28-30
250
800
Sm2Co17
YXG-32L
11.0-11.5
6.8-10.2
8-12
29-32
250
800
(SmEr)2(CoTM)17
LTC(YXG-22)
9.4-9.8
8.4-9.0
15-20
21-23
300
840
CE(CoFeCu)
YX-12
7.0-7.4
4.5-4.9
4.5-6.0
10-13
200
450
Sintered Smco auxiliary magnetic and physical properties
Item
Parameters
SmCo5
Sm2Co17
Auxiliary magnetic properties
Temp. coefficient of Br (α(Br))/%/ K-1
-0.05
-0.03
Temp. coefficient. of Hcj (α(Hcj)/%/ K-1
-0.3
-0.3
Curie Temperature (Tc)/K
1000
1000
Recoil Permeability (μrec)
1.05
1.10
physical properties
Density (g/cm-3)
8.2
8.4
Vickers Hardness
Hv/MPa
450
650
Electrical Resistivity
(ρ/Ω•cm)
5.3x10-5
8.5x10-5
Compressive Strengthδc/MPa
1000
800
Tensile Strength
δb/ MPa
400
350
Bending Strength
δw/MPa
180
150
Compare of the magnetic properties for permanent magnet material
item
Js/T
(BH)m
/KJ.m-3
HA
/MA.m-1
Tc/℃
RE/TM
TM
SmCo5
1.15
248
32
740
0.166
Co
Sm2Co17
1.56
480
8
890
0.105
Co
Nd2Fe14B
1.61
528
6
310
0.117
Fe
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 Ms. Annie

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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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