High-purity, ultra-thin electrolytic iron foil for magnetic applications and various thin film needs
- High purity (99.9% or more)
- Iron is an abundant resource (availability)
- Easily bendable (workability)
- Available1 in broad widths, ideal for production
- Thickness 10–20 μm1
1：Available production sizes vary depending on the combination of thickness and hardness.
(Example of past mass production: Maximum width 900 mm at 20 μm)
Properties of pure iron foil
Composition & purity
| Composition | C | Si | P | S | Mn | Fe purity |
|---|---|---|---|---|---|---|
| [ppm] | 50 or less | 10 or less | 10 or less | 10 or less | 10 or less | 99.9% or more |
Magnetic & electrical properties (Evaluated at 50 μm thickness: Type B has low coercive force and high permeability: Soft magnetic material)
| Pure iron foil: Type A | Pure iron foil: Type B | Comparison: Silicon steel sheet | |
|---|---|---|---|
| Residual flux density [T] | 0.9 | 1.5 | 0.9 |
| Coercive force [Oe] | 5.1 | 0.8 | 0.3 |
| Magnetic permeability [μmax] | 1,000 | 9,000 | 12,000 |
| Volume resistivity [μΩcm] | 9.4 | 9.4 | – |
Corrosion resistance (visual appearance over time in high-temperature humid environment)
No rust2
No rust2
No rust
2：This is an indication that rust is less likely to occur compared to carbon steel foil, and does not guarantee that rust will not form.