Magnetisation – Magnetic characteristics
Magnetic characteristics of TROMAFLEX® – Grades
(average values from different production batches)
| TROMAFLEX® | 324 | 325 | 928 |
| hard ferrite | 3/24 p | 3/25 p | 9/28 p |
| Br (mT) | 127 | 142 | 220 |
| BHC(kA/m) | 91 | 98 | 170 |
| IHC(kA/m) | 240 | 250 | 280 |
| (BH) max. (kJ/m³) | 3.0 | 3.5 | 9.0 |
| Filling degree (g/cm³) | 3.4 | 3.73 | 3.5 |
Types of magnetisation
One-sided multipole magnetised
n = neutral zone
Two-sided multipole magnetised
n = neutral zone
Axially magnetised
Method of manufacturing anisotropic flexible magnets
TROMAFLEX® 928
Using special oxide ceramic permanent magnet materials, an increase in the magnetic energy density of plastic-bonded permanent magnets can be achieved by suitable manufacturing processes. This results in a significant increase of the adhesive force compared to isotropic permanent magnets.
In the production of anisotropic permanent magnets, the strontium ferrite particles, which are usually disk-shaped, are mechanically aligned in the heated plastics surrounding them in such a way that as large a proportion as possible of their preferred magnetic axes are aligned parallel in the required direction.
Barium ferrite isotropic
TX 324/325
Strontium ferrite anisotropic
TX 928
Aligned preferred axis