Product detail
Sintered Ferrite (Hard ferrite magnets) were developed in the 1960s as a low cost alternative to metallic magnets. Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, Ceramic Magnets (Hard ferrite magnets) have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact, measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.
Besides industrial application, Ceramic Magnets (Hard ferrite magnets) are widely use in Educational area.
Ferrite magnets are manufactured by pressing, sintering, or injection molding. These magnets can be both anisotropic and isotropic. Anisotropic grades are oriented in the manufacturing direction and must be magnetized in the direction of orientation. Isotropic grades are not oriented and can be magnetized in any direction.
Physical property of hard ferrite magnets
| Typical Physical Properties |
| Curie Temperature (°C) | 450 |
| Maximum Operating Temperature (°C) | 250 |
| Hardness (Hv) | 480-580 |
| Density (g/cm3) | 4.8 - 4.9 |
| Relative Recoil Permeability (μrec) | 1.05 - 1.20 |
| Saturation Field Strength, kOe (kA/m) | 10 (800) |
| Temperature Coefficient of Br (%/°C) | -0.2 |
| Temperature Coefficient of iHc (%/°C) | 0.3 |
| Tensile Strength (N/mm) | <100 |
| Transverse Rupture Strength (N/mm) | 300 |
Mostly Used national standard - SJ285-77 permanent ferrite magnet standard
| Grade | Br | Hcb | Hcj | BHmax |
| kGs | mT | kOe | kA/m | kOe | kA/m | KJ/m3 | MGOe |
| Y10T(=C1) | 2.00/2.18 | 200/218 | 1.57/1.82 | 125/145 | 2.64/3.14 | 210/250 | 6.5/8.0 | 0.8/1.0 |
| Y25 | 3.60/3.70 | 360/370 | 1.70/1.88 | 135/150 | 1.76/2.14 | 140/170 | 22.5/25.3 | 2.8/3.2 |
| Y30(=C5) | 3.80/3.85 | 380/385 | 2.40/2.64 | 191/210 | 2.50/2.51 | 199/220 | 26.0/28 | 3.4/3.7 |
| Y30BH | 3.80/3.90 | 380/390 | 2.80/2.95 | 223/235 | 2.90/3.08 | 231/245 | 27.0/30.0 | 3.4/3.7 |
| Y33 | 4.10/4.20 | 410/420 | 2.77/2.95 | 220/235 | 2.83/3.01 | 225/240 | 31.5/33.0 | 4.0/4.2 |
| Y35 | 4.00/4.10 | 400/410 | 2.20/2.45 | 175/195 | 2.26/2.51 | 180/200 | 30.0/32.0 | 3.8/4.0 |
| C8(=C8A) | 3.85/3.90 | 385/390 | 2.95/3.20 | 235/255 | 3.05/3.33 | 242/265 | 27.8/30.0 | 3.5/3.7 |
| C10 | 4.00/4.10 | 400/410 | 3.62/3.77 | 288/300 | 3.51/3.60 | 280/287 | 30.4/31.9 | 3.8/4.0 |
Delivery time
7-10 Working days
Zhu Zhou Summit New MAterials Co. Ltd was founded in 2009, as a professional manufacturer and exporter, We are specialized in producing of rare earth magnet with the capacity of 1000 ton/year, including the grade of sintetred NdFeB magnet such as N52 N50M N48H N45SH N40UH N38EH N33AH. Great block magnets of N45H (6"X4"X2") for magnetic suspension, Big ring magnets N42M (OD100 OD120 OD150 OD160 OD200) for magnetic separator, All kinds of complicated shape of arc magnets for automotive motor and wind power generator are competitive.
Our aim is to provide all kinds of magnetic solutions for customers. Our senior engineer provides Halbach circuit magnetic design, High speed DC motor magnetic problem and lamination solutions.
All kinds of magnetic assemblings is possible in our workshop with our special tool and methods.
Now we can provide Halbach ring magnets with 0.8T-1.4T, magnetic polars for magnetic suspension parts, great magnetic brake and couplings, rotor magnets for DC motor, RMI magnets, 1.5T magnetic pulley, 1.25T magnetic grate bar and so on.
We can promptly produce loudspeaker unit and stamping lamination stator, rotor according to customer' design.
Special surface coating of Neodymium magnets is very important, we can provide magnets with parylene coating, Electroless Nickel, epoxy coating!
Our purpose " Honesty, Professional, Mutual Benefit "
