Category: hard ferrite magnets/ ceramic magnets

Advantages: coercive force is high;strong resistance to demagnetization,suitable for dynamic working magnetic circuit structure;good corrosion resistance,surface treatment not needed

Disadvantages: low magnetic energy; not resistant to low temperature
Product Description
Hard ferrite magnets belong to sintered permanent magnetic material, which made from oxide iron, barium, and strontium carbonate by ceramic processing technology, just because of the processing method, it also named as ceramic magnets in America.This magnetic material has strong ability to resist demagnetization and the advantage of low cost.

Ferrite permanent magnets classified as isotropic and anisotropic. Isotropic ferrite magnets have weak magnetic strength, but it can be magnetized through different directions. Anisotropic ferrite magnets have stronger magnetic strength than isotropic, but it can be only magnetized through certain direction.

By magnetic strength, ferrite magnets or ceramic magnets are much weaker than neodymium permanent magnets and SmCo magnets, but stronger than AlNiCo magnets. But its advantages of low cost, excellent corrosion and demagnetization resistance, which makes it widely used in the area of magnetic separator, speaker magnets, magnetic toys, office magnets, car magnets. From the aspect of shape, hard ferrite magnets are usually available as ceramic block magnets, ferrite ring magnets, ferrite disc magnets and ceramic block magnets. Ferrite disc magnets often used on office magnets, ferrite ring magnets often used to make loudspeaker, ferrite block magnets can be used to make separate magnets.

Ferrite magnets (ceramic magnets ) was developed in the year of 1960, and it is lower in power (B, Br, BHmax) compared to other formulations, and are very brittle. However, they have very high Hcj and good Tc, and are quite corrosion-resistant. So ceramic magnets are a cost-effective choice.

Ferrite magnets produced by powder metallurgy ways, the remanence is low, The coercive force is high, especially suit for magnetic structure used in the condition of dynamic operation. The material is hard and crisp, silicon carbide tools are used for cutting machine. The main material for ferrite magnets is oxide, not easy to be rust.
Grade Br HcB HcJ (BH)max Work Temp
China Standard IEC standard mT kA/m(min.) kA/m(min.) kJ/m(min.) ℃(max.)
Y10T HF 8/22 200-235 125-160 210-280 6,5-9,5 250
Y20 HF 20/19 320-380 135-190 140-195 18,0-22,0 250
Y22H HF 20/28 310-360 220-250 280-320 20,0-24,0 250
Y23 HF 22/30 320-370 170-190 190-230 20,0-25,0 250
Y25 HF 24/16 360-400 135-170 140-200 22,5-28,0 250
Y26H HF 24/23 360-390 220-250 225-255 23,0-28,0 250
Y26H-2 HF 24/35 360-380 263-288 318-350 24,0-28,0 250
Y28 HF 26/16 370-400 175-210 180-220 26,0-30,0 250
Y25H HF 26/18 360-390 175-215 215-230 24,0-27,0 250
Y28H HF 26/24 380-400 240-260 250-280 27,0-30,0 250
Y28H-2 HF 26/26 360-380 270-295 380-405 26,0-30,0 250
Y30 HF 28/16 380-385 190-210 200-220 26,0-28,0 250
Y30BH HF 28/28 380-400 230-275 235-290 27,0-32,0 250
Y30H-2 HF 30/26 395-415 275-300 310-335 28,5-32,5 250
Y32 HF 32/17 400-420 160-190 165-195 30,0-33,5 250
Y33 HF 32/22 410-430 220-250 225-255 31,5-35,0 250
Y33H HF 32/25 410-430 240-270 250-275 31,5-35,0 250
Y35 - 410-430 175-195 180-200 30,0-32,0 250
Property/Performance Parameter of Ceramic Magnets(America Standard)
Material Br HcB HcJ (BH) Max
mT KG KA/m KOe KA/m KOe Kj/m3 MGOe
C1 230 2.3 148 1.86 258 3.50 8.36 1.05
C5 380 3.8 191 2.40 199 2.50 27.0 3.40
C7 340 3.4 258 3.23 318 4.00 21.9 2.75
C8 385 3.85 235 2.95 242 3.05 27.8 3.50
C8B 420 4.2 232 2.913 236 2.96 32.8 4.12
C9 380 3.8 280 3.516 320 4.01 26.4 3.32
C10 400 4.0 288 3.617 280 3.51 30.4 3.82
C11 430 4.3 200 2.512 204 2.56 34.4 4.32

#china #ceramic #magnets
https://www.meank-magnet.com/products/magnetic-material/ferrite-ceramic-magnets.html