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Yuhuan Jinhong Machinery Manufacturing Co., Ltd.
Ferrite Magnets
Ferrite Magnets
Ferrite Magnets
Ferrite Magnets
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Sintered ferrite magnets
Sintered Ferrite Magnets

Ferrite Magnets

Ferrite magnets are hard and brittle, with low magnetic energy. However, they are not easy to demagnetize or corrode, and the production process is simple and the price is low.

Categories: Ferrite Magnets, Magnets
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  • Description
Description

Ferrite Magnets

Ferrite magnets are a type of permanent magnet primarily manufactured using SrO (strontium oxide) or BaO (barium oxide) and Fe₂O₃ (iron oxide) as raw materials. Compared to other permanent magnets, ferrite magnets are hard and brittle, with relatively low magnetic energy. However, they are resistant to demagnetization and corrosion, feature a simple production process, and are cost-effective. These properties make ferrite magnets the most widely produced and applied magnets in industrial production.


Ferrite Magnets Material Overview

Ferrite magnets belong to the category of sintered permanent magnetic materials, composed of barium or strontium ferrite. They are notable for:

  • High resistance to demagnetization, maintaining stable magnetic properties.
  • Low cost, due to abundant raw materials and simple production methods.
  • Brittle and hard nature, requiring special machining techniques.

Magnetic Orientation

  • Anisotropic magnets: Stronger magnetic properties but can only be magnetized along a specific orientation.
  • Isotropic magnets: Weaker magnetic properties but can be magnetized in any direction.

Magnetic energy ranges from 1.1 MGOe to 4.0 MGOe. Ferrite materials can be categorized into various types such as soft magnetic, hard magnetic (including bonded magnets), gyromagnetic, Torque and piezomagnetic materials and other specialized materials.

Ferrite Magnets Key Features:

  1. Soft magnetic materials: High permeability, low coercivity, and low loss.
  2. Hard magnetic materials: High coercivity (Hc) and high magnetic energy product (BH)max.
  3. Gyromagnetic materials: Exhibit gyromagnetic properties for microwave communication devices.
  4. Torque and piezomagnetic materials: High linear magnetostrictive coefficient, suitable for specific industrial uses.

Material Characteristics

  • Production Method: Powder metallurgy.
  • Magnetic Properties: Low residual magnetism, low magnetic permeability, high coercivity.
  • Corrosion Resistance: Made mainly of oxides, offering strong corrosion resistance.
  • Operating Temperature: From -40°C to +200°C.
  • Applications: Widely used in motors, speakers, toys, and crafts.

Performance Specifications

Sintered Ferrite Magnets Grades

Grade Residual Induction (Br) Coercivity (HcB) Intrinsic Coercivity (HcJ) Max Energy Product (BH)max
mT KGauss KA/m KOe KA/m KOe KJ/m3 MGOe
Y8T 200~235 2.0~2.35 125-160 1.57-2.01 210-280 2.64-3.51 6.5-9.5 0.8-1.2
Y22H 310~360 3.10~3.60 220-250 2.76-3.14 280-320 3.51-4.02 20.0-24.0 2.5-3.0
Y25 360~400 3.60~4.00 135-170 1.70-2.14 140-200 1.76-2.51 22.5-28.0 2.8-3.5
Y26H-1 360~390 3.60~3.90 200-250 2.51-3.14 225-255 2.83-3.20 23.0-28.0 2.9-3.5
Y26H-2 360~380 3.60~3.80 263-288 3.30-3.62 318-350 3.99-4.40 24.0-28.0 3.0-3.5
Y27H 350~380 3.50~3.80 225-240 2.83-3.01 235-260 2.95-3.27 25.0-29.0 3.1-3.6
Y28 370~400 3.70~4.00 175-210 2.20-3.64 180-220 2.26-2.76 26.0-30.0 3.3-3.8
Y28H-1 380~400 3.80~4.00 240-260 3.01-3.27 250-280 3.14-3.52 27.0-30.0 3.4-3.8
Y28H-2 360~380 3.60~3.80 271-295 3.40-3.70 382-405 4.80-5.08 26.0-30.0 3.3-3.8
Y30H-1 380~400 3.80~4.00 230-275 2.89-3.46 235-290 2.95-3.64 27.0-32.5 3.4-4.1
Y30H-2 395~415 3.95~4.15 275-300 3.45-3.77 310-335 3.89-4.20 27.0-32.0 3.4-4.0
Y32 400~420 4.00~4.20 160-190 2.01-2.39 165-195 2.07-2.45 30.0-33.5 3.8-4.2
Y32H-1 400~420 4.00~4.20 190-230 2.39-2.89 230-250 2.89-3.14 31.5-35.0 3.9-4.4
Y32H-2 400~440 4.00~4.40 224-240 2.81-3.01 230-250 2.89-3.14 31.0-34.0 3.9-4.3
Y33 410~430 4.10~4.30 220-250 2.76-3.14 225-255 2.83-3.20 31.5-35.0 3.9-4.4
Y33H 410~430 4.10~4.30 250-270 3.14-3.39 250-275 3.14-3.45 31.5-35.0 3.9-4.4
Y34 420~440 4.20~4.40 200-230 2.51-2.89 205-235 2.57-2.95 32.5-36.0 4.1-4.4
Y35 430~450 4.30~4.50 215-239 2.70-3.00 217-241 2.73-3.03 33.1-38.2 4.1-4.8
Y36 430~450 4.30~4.50 247-271 3.10-3.40 250-274 3.14-3.44 35.1-38.3 4.4-4.8
Y38 440~460 4.40~4.60 285-305 3.58-3.83 294-310 3.69-3.89 36.6-40.6 4.6-5.1
Y40 440~460 4.40~4.60 330-354 4.15-4.45 340-360 4.27-4.52 37.6-41.8 4.7-5.2

Bonded Ferrite Magnets Grades

Grade Residual Induction (Br) Coercivity (HcB) Intrinsic Coercivity (HcJ) Max Energy Product (BH)max
mT KGauss KA/m KOe KA/m KOe KJ/m3 MGOe
YN1T 63-83 0.63-0.83 50-70 0.63-0.88 175-210 2.20-2.64 0.8-1.2 0.1-0.15
YN4H 135-155 1.35-1.55 85-105 1.07-1.32 175-210 2.20-2.64 3.2-4.5 0.4-0.56
YN4TH 150-180 1.50-1.80 95-120 1.19-1.38 180-230 2.26-2.89 3.8-5.5 0.48-0.69
YN6T 180-220 1.80-2.20 120-140 1.28-1.76 175-200 2.20-2.51 5.0-7.0 0.63-0.88
YN10 220-240 2.20-2.40 145-165 1.82-2.07 190-225 2.39-2.83 9.2-10.6 1.15-1.33
YN10H 220-250 2.20-2.50 150-200 1.88-2.51 190-220 2.39-2.76 9.2-11.0 1.15-1.38
YN11 230-250 2.30-2.50 160-185 2.01-2.32 225-260 2.83-3.27 10.0-12.0 1.25-1.5
YN12 240-250 2.40-2.50 140-160 1.76-2.01 200-230 2.51-2.89 11.4-13.6 1.43-1.7

Comparison with Neodymium Magnets

Property Ferrite Magnets Neodymium Magnets
Material Type Composite of ferromagnetic oxides Rare-earth alloy
Magnetic Strength Low (800-1000 Gauss) High (approx. 3500 Gauss)
Corrosion Resistance Excellent, no surface treatment required Poor, requires protective coating
Thermal Stability High, suitable for higher temperatures Lower, susceptible to thermal degradation
Cost Economical, low production cost Higher cost, better performance-to-price ratio
Applications Motors, speakers, toys, crafts Electronics, precision devices, aerospace

Conclusion

Ferrite magnets are highly valued for their cost-effectiveness, stability, and wide range of industrial applications. While their magnetic performance is not as strong as neodymium magnets, their resistance to demagnetization and corrosion ensures their continued significance in the magnet industry.

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  • Home
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    • Magnetic Assembly
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    • Magnetic Separation & Filtration in Pharmaceuticals Industry
    • Food Processing
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    • Magnetic Separation in Textile and Plastics Industry
    • Magnetic Separation in Ceramic & Glass Industry
    • Lithium Battery Powder
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