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Ceramic Ring Magnets

Ferrite Ring Speaker Magnet/Large Ceramic Ring Magnets


1.Dimensions: According to your requirements


2.Grade: Y30,Y30BH,Y30BH-1,Y35 and etc


3.Magnetized: Diametrical,Axial,Thickness,as optional


4.Size:max out dia. 280mm,max thickness 40mm


5.Tolerance:OD and ID 2%,+/-0.1mm for thickness

Product Detail

Physical Properties of Anisotropic Ferrite Magnet

Density 4.8 ~ 5.1 g/cm³
Electrical Resistivity >=10(4) Ω.cm
Recoil Permeablility 1.05 ~ 1.03
Curie Temperature 460 ~ 480℃
Temperature Coefficient of Br -0.18 ~ -0.2 % /  ( 0-100℃) 
Temperature Coefficient of Hc 0.2 ~ 0.5 % / ℃( 0-100℃)
Coefficient Of Linear Expansion 7 ~ 15  X 10(-6)  /℃


Applications
Fan Motors
Wiper Motors
EPS Motors
Starter Motors
Home appliance Motors
Industrial Motors
Motorcycle Motors
other DC Motors


Process of Ferrite Magnet manufacturing

Raw Material--Mixing / Milling--Calcination--Coarse Milling--Wet Milling--Pressing--Sintering--Grinding&Finishing--Final Inspection--Packing and Dispatch


Advantages of Ferrite Permanent Magnets
Do not corrode in water.
Can be used up to ﹢250 degrees C.
Sometimes up to +300 degrees C in special circumstances.
High coercivity (Hci) that increases as magnet heats up.
Electrically insulating.
Low cost.


Need a Quote?

Please specify the following while ordering:

Shape, dimensions and tolerance

Magnetic specifications

Quantity (one time or repeating order)

Application / End use of the Strontium Ferrite Magnet

Direction of Magnetization

Magnet acceptance inspection method

Magnetization requirements (magnetised) / (demagnetised)


For more specific requirement,Please see Magnetic Properties Of Sintered Ferrite Magnet or contact with our specialist directly.
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