Ceramics

Ferrite Magnets

Ferrite Magnets

Features


Ferrite Magnets
MARUWA manufactures ferrite magnets from the material phase to magnetization. They are used mainly in automotive/magnetic medical application and sensor.

Applications


Communication equipment, Motor, Adsorption, Relay, Medical, Sensor, etc.

Standard Material Characteristics


Material Classification Residual Flux Density <Br> Coercive Force <BHc> Maximum Energy Product <(BH)max> Density(g/㎤) Curie Temp. (°C) Thermal Expansion Coefficient (10-5/°C)
Q2 Isotropic (Ba Type) T 0.20~0.24 kA/m 127~160 kl/㎥  7.1~10.4 4.9~5.0 460 0.9~1.5
G 2,000~2,400 Oe  1,600~2,000 MGOe 0.9~1.3
Q6 Wet Anisotropic (Ba Type) T 0.40~0.43 kA/m 143.3~175 kl/㎥  28.8~32.0 5.0~5.2 450 0.9~1.5
G 4,000~4,300 Oe  1,800~2,200 MGOe 3.6~4.0
SR-2H Wet Anisotropic (Sr Type) T 0.38~0.41 kA/m 262~287 kl/㎥  27.0~32.0 4.75~4.95 460 0.9~1.5
G 3,800~4,100 Oe  3,300~3,600 MGOe 3.4~4.0
SR-3 Wet Anisotropic (Sr Type) T 0.41~0.43 kA/m 215~247 kl/㎥  32.0~35.2 4.8~5.0 460 0.9~1.5
G 4,100~4,300 Oe  2,700~3,100 MGOe 4.0~4.4
SR-30 Dry Anisotropic (Sr Type) T 0.34~0.38 kA/m 222~255 kl/㎥  20.6~24.5 4.8~5.0 460 0.9~1.5
G 3,400~3,800 Oe  2,800~3,200 MGOe 2.6~3.2
SR-40 Dry Anisotropic (Sr Type) T 0.36~0.39 kA/m 218~251 kl/㎥  23.0~27.9 4.9~5.1 460 0.9~1.5
G 3,600~3,900 Oe  2,750~3,150 MGOe 2.9~3.5
SR-40S Dry Anisotropic (Sr Type) T 0.38~0.41 kA/m 214~247 kl/㎥  27.0~31.9 4.9~5.1 460 0.9~1.5
G 3,800~4,100 Oe  2,700~3,100 MGOe 3.4~4.0

Substance Characteristics


Item Unit Range
Transverse Strength Kgf/㎟ 5~9
Tensile Strength Kgf/㎟ 2~5
Vickers Hardness 400~700
Thermal Expansion Confficient Anistropic Direction ×10-6/K 14~15
Anistropic Square Direction ×10-6/K 9~10
Thermal Conductivity W/m・K ~5.8
Specific Heat J/kg・K 630~840
Temprature Coefficient ⊿Br/Br/°C -0.18~0.20
⊿Hc/Hc/°C +0.20~+0.50
Electrical Resistance Ω・㎝ >104
Recoil Permeability µrec 1.05~1.20
Magnetizing Power Required for Magnetization kOe 10
kA/m 796
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