Ferrites are a class of chemical compounds with the formula AB2O4, where A and B represent various metal cations, usually including iron. They are generally composed of iron and barium or strontium oxides. Ferrite magnets are very hard, but brittle ceramic products. They are characterized by a vey high normal and intrinsic coercive force, but a rather low residual induction and are virtually free from the effects of a self-demagnetization. They posses a very high electrical resistivity that makes them ideally suited for high frequency applications as the eddy current losses are almost negligible.
Corrosion resistance property of ferrite is very good and as such ni surface treatments are required.
Properties
Corrosion resistance property of ferrite is very good and as such ni surface treatments are required.
Machining
Ferrite magnets are prone to chipping ad cracking due to their brittleness. Special machining techniques such as grinding with diamond tools are required for matching the dimension specifications.
Properties
Y35 Anisotropic Ferrtie
Material | Iso / Anisotropic | Remanence | Coercivity | Intrinsic Coercivity | Max. Energy Product | |||
Br(Gs) | ||||||||
bHc (KA/m) | bHc Oe | iHc (KA/m) | iHc Oe | BH max (KJ/m3) | BH max (MGOe) | |||
Y10 T | Isotropic | >2000 | 128 - 160 | 16000 - 20000 | 128 - 160 | 1600 - 2000 | 6.4 - 9.6 | 0.8 - 1.2 |
Y20 | Anisotropic | 3200 - 3800 | 128 - 192 | 16000 - 24000 | 140 - 180 | 1750 - 2250 | 18.36 - 21.5 | 2.3 - 2.7 |
Y25 | Anisotropic | 3600 - 3900 | 135 - 170 | 17000 - 2140 | 140 - 200 | 1700 - 2510 | 22.5 - 28.0 | 2.8 - 3.2 |
Y30 | Anisotropic | 3800 - 4000 | 175 - 210 | 2200 - 2640 | 180 - 220 | 2200 - 2770 | 26.0 - 30.0 | 3.3 - 3.8 |
Y30 BH | Anisotropic | 3800 - 4000 | 230 - 275 | 2890 - 3460 | 235 - 290 | 2950 - 3650 | 27.0 - 32.5 | 3.4 - 4.1 |
Y35 | Anisotropic | 4000 - 4200 | 160 - 190 | 2010 - 2380 | 165 - 195 | 2070 - 2450 | 30.0 - 33.5 | 13.8 - 4.2 |
