Micaceous iron oxide Portafer AP65
Coating raw materials 2025-08-20
Introduction
Micaceous iron oxide (Fe2O3) is a naturally occurring iron oxide with a layered structure similar to mica (hence the name).
Features
Black color
Layered structure
Highly inert in various media (the iron in the mineral has been oxidized)
Basic properties
| Property | Value | Unit |
| Moisture | 0.1 | [%] |
| PH | 9 | [-] |
| Hardness(Mohs) | 6 | [-] |
| Electrical conductivity | 60 | [us/ cm] |
| Colour | black | [-] |
| Lamellarity | ＞70 | [%] |
| Soluble matter | ＜0.1 | [%] |
| L.O.1. | 0.6 | [%] |
| Density | 4.7 | [kg/ dm3] |
| Product | Grade | 63 | 75 | 125 | OA |
| µm | µm | µm | |||
| [%] | [%] | [%] | |||
| Portafer | AP65 | 3.7 | 1.6 | / | 17 |
| AP75 | 12.5 | 5.0 | / | 15 |
Benefits
Abrasion Resistance: With a Mohs hardness of 6. MIO improves the abrasion resistance of coatings.
Chemical Resistance: Due to its lamellar structure and inertness, MIO provides barrier properties to primers and topcoats compared to traditional fillers and exhibits good chemical resistance.
Mechanical Reinforcement: Due to its layered structure, MIO mechanically reinforces the adhesive matrix.
UV Resistance: Since MIO is insensitive to UV radiation, it reduces coating degradation.
