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Address:No. 249 West Xianmu Road, Huzhen Town, Jinyun County, Lishui, Zhejiang China
Zip Code:321404
TEL: +86-578-3272111
FAX:+86-578-3263799
E-mail: sales@cnlishuai.com

Complaints:Loonge Zhang
E-mail:loonge@cnlishuai.com

Rubber Magnet



Rubber Magnet

 

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Features & Spec.
 
Application
 
Attention
 
Package
 
Name:Rubber Magnet
Serial:Rubber Magnet
Features:Rubber Magnet
Detail:

General Description:
Ceramic (ferrite) magnets are composed of SrO or BaO and Fe2O3. They are charcoal gray in color and usually appear in the forms of discs, rings, blocks, cylinders, and sometimes arcs or segments for motors.

 Applications of Ceramic Magnets:
• Speaker magnets
• DC brushless motors
• Magnetic Resonance Imaging (MRI)
• Magnetos used on lawnmowers and outboard motors
• DC permanent magnet motors (used in cars)
• Separators (separate ferrous material from non-ferrous)
• Used in magnetic assemblies designed for lifting, holding, retrieving and separating
• Magnetic Door Catcher
• Instrument and Meters
• Toys
• Arts and crafts
 
Attributes of Ceramic Magnets:
• Least expensive material compared to alnico and rare earth magnets
• High intrinsic coercive force
• Available in simple shapes only due to manufacturing process
• Lower service temperature than alnico, greater than rare earth 
• Lower energy product than alnico and rare earth magnets
• Most common grades of Y25,Y30,Y30H-1,Y30H-2,Y32,Y33 ceramic are 1, 5 and 8 (1-8 possible)
 
Tolerances:
For as pressed material, tolerance on the thickness (direction of magnetization) is ± .005inch. Other dimensions are ± 2% or ± .010inch, whichever is greater.

Magnetic Characteristic of Rubber Magnet
Classification
Type
MT(GS)
Hcb
Hcj
(BH)max
Composition
Mode of production
KA/m (Oe)
KA/m (Oe)
KJ/m3(MGOe)
Isotropic Rubber Magnet
YNT-4
135-155(1350-1550)
85-105 (1050-1300)
175-210 (2200-2600)
3.2-5.0 (0.40-0.62)
BaO.6Fe2O3 SrO.6Fe2O3
Extruding Rolling 
YNT-S5
165-180(1650-1800)
90-105(1130-1300)
135-160(1700-2010)
4.5-5.8(0.56-0.72)
YNT-B5
170-190(1700-1900)
90-115(1200-1450)
150-190(1885-2400)
4.6-6.5(0.57-0.80)
YNT-6.5
185-200(1850-2000)
90-110(1130-1380)
125-150(1570-1885)
6.0-7.0(0.74-0.93)
Anisotropic Rubber Magnet
YNY-10
220-240(2200-2400)
140-165(1760-2070)
200-235(2500-2950)
9.0-10.5(1.1-1.30)
SrO.6Fe2O3
Rolling 
YNY-11
230-250(2300-2500)
145-165(1820-2070)
190-225(2380-2850)
9.5-11.0(1.18-1.36)
YNY-13
250-270(200-2700)
175-190(2200-2400)
200-230(2500-2900)
11.5-14.5(1.42-1.80)
YNY-15
≥270(≥2700)
175-190(2200-2400)
200-230(2500-2900)
≥14.5(≥1.8)

Physical Property of Ferrite Magnets

Parameter         

mark

Unit

Value

Recoil permeability                           

μrec

Gs/Oe

1.05-1.3

Curie Temperature

Tc

450

The coefficient of demagnetization to temperature  

ɑ(Br)

℃-1

-0.2%(0-100℃)

The coefficient of demagnetization coercive force to temperature   

ɑ(Hc)

℃-1

0.2%-0.5%(0-100℃)

Density

d

g/cm³

4.7-5.0

Resistivity

ρ

℃-1

≥106

The coefficient of linear expansion

ɑ

℃-1

 

Hardness

HV

      -

480-580


No. 249 West Xianmu Road, Huzhen Town, Jinyun County, Lishui, Zhejiang China (Mainland)
Tel:+86-578-3272111,Fax:+86-578-3263799
E-mail:sales@cnlishuai.com

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