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
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)
