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Ferrite

Ferrite magnets

Ferrite magnets are low-cost, lightweight permanent magnets with moderate energy levels and relatively high coercive strength, capable of operating at temperatures up to 480°F. They offer excellent corrosion resistance, making them ideal for high-volume applications in manufacturing and consumer products. Ferrite magnets are available in two types: isotropic and anisotropic. Isotropic ferrite magnets have lower magnetic properties due to their nearly uniform magnetic behaviour in all directions, allowing them to be magnetized in multiple directions or multi-poles. Anisotropic ferrite magnets have better magnetic properties.

♦ Cost-effective solution for high-volume applications

♦ Medium strength performance

♦ High-temperature resistance

♦ Available in both isotropic and anisotropic grades

♦ Corrosion-resistant for durability

♦ Capable of withstanding high temperatures up to 300°C

♦ Cost-effective solution for low Br requirements, up to 4.2 MGOe

 

 

 

Classification and applications of ferrite magnets

Material Grades Main Applications Characteristics Shapes
ZY10T Strip magnet for sensor, disk, apparatus, household appliance, electric motor, medical device, sensor Isotropic, material easy to multimagnetize by different direction, magnets with high precise dimension Strip, cylinder, ring, U-shape
ZY20J
ZY20
Electric motors for water and oil pump, and other micro-brushless motor rotor Dry anisotropic products, multi-pole radial or full-eddy magnetic ring, high surface magnetic, stable performance characteristics Cylinder, Ring
ZY25
ZY30
All kinds of loudspeakers audio, electric-motor, medical device, sensor, receiver, pulling-system High-density, high and stable performance Ring, Cylinder, Block, Block and hole
ZY33H
ZY34H
ZY4036
Electric motors for electric tools, magnetic motor for motorcycle, electric motors for Auto. Applications such as wiper, power window, magnetic pulling devices, household appliance, medical treatment device, sensors, ABS motor, starter motors for motorcycle, plane motor Moderate BR and Hcj, stable performance, strong capability in anti-demagnetization, extensive application Segment, Block, Ring, Cylinder
ZY4129 High-quality loudspeakers, receivers, electric-motors for meters and instrument, magnetic adhesion, medical device, magnetic motor High Br & sensitivity, stable, excellent quality, high flux density Ring, Cylinder, Block
ZY4229 Microwave oven Magnetron, high-quality loudspeakers, receivers, electric-motors for office-equipment, apparatus and instrument, micro-motor High Br and Hcb, high sensitivity stable, excellent quality, high flux density Ring, Cylinder, Segment, Block
ZY3845
ZY3850
ZY4040
ZY4350
Starter motors for automobile and for motorcycle, other motor for automobile, conditioning/ refrigerator compressor motor High Hcb and Hcj, with strong capability in anti-demagnetization and aging, wide temperature range Segment, Block
ZY4240
ZY4040
ZY4545
Starter motors for automobile, Electric motors for auto application such as ABS, blower , wiper and electric shift motor and adjustable Pedal motor, electric motors for household appliance, compressors of air-conditioners and etc. higher Br and high flux density, with high power, stable performance, extensive application Segment, Ring, Block
ZY4433
ZY4646
Electric motors for oil pump and throttle of auto. as well as high -grade loudspeakers, meters, household appliance and office automation Higher Br with high sensitivity applying for micro-sized high performance motors Segment, Ring, Block
ZY4654
ZY4748
Starter motors for automobile, compressors of air-conditioner and refrigerator, electric motors for auto appliance such as ABS, power window, sunroofs and oil pump Higher Br and high flux, strong capability in anti-demagnetization, low temperature coefficient segment, Block

 

Magnetic & Physical Properties

Remark: C//: parallel to akle, C⊥:perpendicular to axle; ( ): SI unit system, [ ]: CGSM unit system

Material Grade ZY10T ZY30 ZY33H ZY34H ZY3845 ZY3850 ZY4036 ZY4040 ZY4129 ZY4240 ZY4433 ZY4350 ZY4545 ZY4654 ZY4748
Composition SrO · 6Fe2O3 BaO · 6Fe2O3  SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3 SrO · 6Fe2O3

Br Residual Flux Density

(mT) 210~240 390~410 390~410 370~390 370~390 370~390 395~415 390~410 400~420 410~430 430~450 420~440 440~460 450~470 460~480
[Gs] 2100~2400 3900~4100 3900~4100 3700~3900 3700~3900 3700~3900 3950~4150 3900~4100 4000~4200 4100~4300 4300~4500 4200~4400 4400~4600 4500~4700 4600~4800

Hcb Coercive Force

(kA/m) 127~159 175~207 239~271 263~291 263~299 279~303 263~291 271~295 215~239 283~307 247~271 291~326 318~350 330~360 328~352
[Oe] 1600~2000 2200~2600 3000~3400 3300~3650 3300~3750 3500~3800 3300~3650 3400~3700 2700~3000 3550~3850 3100~3400 3700~4100 4000~4400 4150~4450 4150~4400

Hcj Intrinsic Coercive Force

(kA/m) 211~279 179~211 243~275 307~330 342~378 382~406 279~303 307~326 219~243 307~330 251~275 386~410 347~370 415~445 368~392
[Oe] 2650~3500 2250~2650 3050~3450 3850~4150 4300~4750 4800~5100 3500~3800 3850~4100 2750~3050 3850~4150 3150~3450 4850~5150 4350~4650 5250~5550 4650~4950
(BH)max
Max. Energy Product
(kJ/m³) 6.4~9.5 27.1~31.2 27.1~31.2 24.7~28.7 25.5~28.7 25.5~28.7 28.7~31.8 29.6~32.8 29.6~32.8 31.8~35.2 35.2~38.4 33.4~36.6 36.6~39.8 39.8~43.0 41.5~44.7
[MGOe] 0.8~1.2 3.4~3.9 3.4~3.9 3.1~3.6 3.2~3.6 3.2~3.6 3.6~4.0 3.7~4.1 3.7~4.1 4.0~4.4 4.4~4.8 4.2~4.6 4.6~5.0 5.0~5.4 5.2~5.6

µec Relative Permeability

1.1~1.2 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1 1.05~1.1
rBr/Br/rT[%/°C] -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18 -0.18

(K) Curie Temperature

733 733 733 733 733 733 733 733 733 733 733 723 723 723 723
Tc (°C) 460 460 460 460 460 460 460 460 460 460 460 450 450 450 450

rL/L/rT

Thermal Coeffient of Expansion

C//*(1/K)[1/°C] (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6 (10~16)*10-6
C*(1/K)[1/°C] 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6 10.0*10-6
Density (kg/m³) (4.70~4.90)*103 (4.80~5.00)*103 (4.90~5.00)*103 (4.80~5.00)*103 (4.80~5.00)*103 (4.80~5.00)*103 (4.90~5.00)*103 (4.90~5.00)*103 (4.90~5.00)*103 (4.90~5.00)*103 (4.90~5.00)*103 (4.90~5.10)*103 (4.90~5.10)*103 (4.90~5.10)*103 (4.90~5.10)*103
[g/cm³] 4.70~4.90 4.80~5.00 4.90~5.00 4.80~5.00 4.80~5.00 4.80~5.00 4.90~5.00 4.90~5.00 4.90~5.00 4.90~5.00 4.90~5.00 4.90~5.10 4.90~5.10 4.90~5.10 4.90~5.10
Anti-Bending Strength (N/m²) (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108 (0.5~0.9)*108
[kgf/mm²] 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9 5~9
Anti-Compressive Strength (N/m²) ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108 ≥6.9*108
[kgf/mm²] ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70 ≥70
Anti-Tensile Strength (N/m²) (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108 (0.2~0.5)*108
[kgf/mm²] 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5 2~5

 

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Ferrite magnets

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