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Generals

Compression moulded magnet

Applications

- Precision motor
- Speaker
- Buzzer
- Sensor and others

Features

- Fundamental patents of Hitachi Metals

- Comparison with Nd - Fe - B bonded magnet
Larger intrinsic coercive force
Smaller temperature coefficient of induction
Superior thermal stability
Better mechanical strength, size accuracy
Superior corrosion resistance

Magnetic Characteristics

Br (kG/T) 5.6 / 0.56
HcB(Hc) (kOe/kA/m) 4.9 / 390
HcJ(iHc) (kOe/kA/m) 10.7 / 852
(BH) max (MGOe/KJ/㎥) 7.2 / 57
Temp.coefficient of Br (%/℃) -0.07
Temp.coefficient of HcJ(iHc) (%/℃) -0.42

Physical Properties

Density (kg/㎥) 5.8
Ring crushing strength (N/㎟) 90
Hardness (Rockwell) 70
Curie point (℃) 498

Termal Stabilities

Irreversible flux loss after 100℃ heated (%) -2.3 500Hrs, Pc=2
Mass change after corrosion test (%) +0.23 PCT 100℃ × 24Hrs, Pc=2
Irreversible flux loss after 60℃ heated (%) -0.1 60℃×95%RH×500Hrs, PC=2