Permanent Magnet Manufacturer China Rare Earth Magnet Limited

Introduction of Performance Parameters of Neodymium Permanent Magnets
Production Process:

 


Inspection Process of Magnetic Materials ----Hysteretic Loops
Blank:
Appearance and dimension inspection→ density inspection →quick test of coercive force (consistency) → accurate measurement of magnetic performance under normal temperature→ variable temperature performance and weight loss
Black patch:
Appearance and dimension inspection→ magnetic flux, magnetic torque, surface magnetism, magnetic declination →aging and decay →weight loss

Basic formula: B=J +μ0
Introduction of magnetic parameter--- demagnetization curves in the second quadrant
Relation between intrinsic demagnetization curves and demagnetization curves

 

Introduction of magnetic parameter---variable temperature demagnetization curves
Temperature coefficient: (20ºC- - TºC)
Br temperature coefficient: а(Br)=(BrTºC--Br20ºC)×100%/(Br20ºC×ΔT) unit: %/ ºC
Hcj temperature coefficient: β(Hcj)=(HcjTºC--Hcj20ºC) ×100%/(Hcj20ºC×ΔT) unit: %/ ºC

Understanding potential requirements, meeting potential demands
1. We should understand magnetic equipment and application industries.
2. We should understand working temperature and maximum working temperature.
3. We should understand using environment.
4. We should know installation and assembling of permanent magnets.
5. We are supposed to guarantee quality controlling grades.
6. We should choose suitable magnetic performance.
7. We should optimize design of magnetic process of neodymium magnets .
8. We should optimize surface treatment of magnets.