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Xiamen Everbeen Magnet Electron Co., Ltd.
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Home > Products > Ceramic Magnets

Ceramic Magnets

Ceramic Magnets
Block Ceramic Magnets
Block Ceramic Magnets
Disc Ceramic magnets
Disc Ceramic magnets
Ring  Ferrite Magnets
Ring Ferrite Magnets
Segment Ferrite Magnets
Segment Ferrite Magnets
Rotor/Sleeve Core Ferrite Magnets
Rotor/Sleeve Core Ferrite Magnets
cheap price ferrite round magnet
cheap price ferrite round magnet
ferrite disc magnet for generator
ferrite disc magnet for generator
ring Ferrite magnets for motor
ring Ferrite magnets for motor
Ferrite Huge Ring Magnet
Ferrite Huge Ring Magnet
Large Ceramic Ring Speaker Magnet
Large Ceramic Ring Speaker Magnet
Ferrite Rectangle Magnets
Ferrite Rectangle Magnets
ferrite strong disc magnets
ferrite strong disc magnets
big magnet for separator with length 150mm
big magnet for separator with length 150mm
Ceramic Magnet Block
Ceramic Magnet Block
ferrite ring magnet for machine
ferrite ring magnet for machine
Ring ceramic Magnet OD 100mm
Ring ceramic Magnet OD 100mm
Ferrite Block Magnet motor
Ferrite Block Magnet motor
cube ferrite magnet
cube ferrite magnet
big Y30 block magnet
big Y30 block magnet
Y30BH ceramic magnet
Y30BH ceramic magnet
grade c8 ceramic block magnet
grade c8 ceramic block magnet
large ferrite speaker magnets
large ferrite speaker magnets
ceramic speaker ring magnet
ceramic speaker ring magnet
strong square ceramic magnet
strong square ceramic magnet
ceramic square magnets
ceramic square magnets
block ferrite magnets y30
block ferrite magnets y30
ceramic bar rectangular magnet
ceramic bar rectangular magnet

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 Ferrite Magnets
Grade Br Hcb Hcj  (BH)max  
mT KG KA/m Koe KA/m Koe KJ/m3 MGOe
Y8T 200-235  2.0-2.35 125-160 1.57-2.01 210-280 2.64-3.52 6.5-9.5 0.8-1.2
Y20 320-380  3.2-3.8 135-190 1.70-2.38 140-195 1.76-2.45 18.0-22.0 2.3-2.8
Y22H 310-360  3.1-3.6 220-250 2.77-3.14 280-320 3.52-4.02 20.0-24.0 2.5-3.2
Y23 320-370  3.2-3.7 170-190 2.14-2.38 190-230 2.39-2.89 20.0-25.5 2.5-3.2
Y25 360-400  3.6-4.0 135-170 1.70-2.14 140-200 1.76-2.51 22.5-28.0 2.8-3.5
Y26H 360-390  3.6-3.9 220-250 2.77-3.14 225-255 2.83-3.21 23.0-28.0 2.9-3.5
Y27H 370-400  3.7-4.0 205-250 2.58-3.14 210-255 2.64-3.21 25.0-29.0 3.1-3.7
Y28H 370-400  3.7-4.0 175-210 2.20-2.64 180-220 2.26-2.77 26.0-30.0 3.3-3.8
Y30H-1 380-400  3.8-4.0 230-275 2.89-3.46 235-290 2.95-3.65 27.0-32.0 3.4-4.1
Y30H-2 395-415    3.95-4.15 275-300 3.46-3.77 310-335 3.90-4.21 28.5-32.5 3.5-4.0
Y32 400-420  4.0-4.2 160-190 2.01-2.38 165-195 2.07-2.45 30.0-33.5 3.8-4.2
Y33 410-430  4.1-4.3 220-250 2.77-3.14 225-255 2.83-3.21 31.5-35.0 4.0-4.4
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