Introduction to Ferroferric Oxide Black in Brake Linings Formulas
Ferroferric Oxide Black (Fe₃O₄), a magnetic iron oxide, is a critical additive in brake linings mixtures, enhancing friction performance and thermal stability in Brake Linings Friction Materials. Its unique magnetic and structural properties make it indispensable for optimizing wear resistance and noise reduction in Brake Linings Mixes. Below is a technical overview, including specifications, advantages, and storage guidelines.
Technical Parameters of Ferroferric Oxide Black in Brake Linings Formula
| Property | Specification | Test Method |
|---|---|---|
| Particle Size | 50-200 nm (adjustable for formulation) | Laser Diffraction |
| Purity | ≥99% | ASTM C561 |
| Bulk Density | 0.7-1.2 g/cm³ | ASTM B212 |
| Magnetic Saturation | 70-90 emu/g | Vibrating Sample Magnetometer |
| Thermal Stability | Stable up to 600°C | ISO 26865 |
| Friction Coefficient | 0.3-0.5 (dry/wet conditions) | SAE J661 |
| Content in Formula | 5-15% (by weight) | Custom formulation |
Advantages of Ferroferric Oxide Black in Brake Linings Ingredients
- Enhanced Friction Stability:
Acts as a friction modifier in brake linings mixtures, ensuring consistent performance across varying temperatures and humidity levels. - Superior Wear Resistance:
Its hard, granular structure reduces abrasive wear on rotors, extending the lifespan of brake linings friction materials. - Noise and Vibration Damping:
Magnetic properties help dampen high-frequency vibrations, minimizing brake squeal in brake linings mixes. - Thermal Management:
High thermal stability prevents brake fade under extreme conditions (up to 600°C), maintaining structural integrity in the brake linings formula. - Compatibility with Hybrid Systems:
Blends seamlessly with resins, graphite, and ceramic particles in brake linings ingredients, enabling tailored formulations for heavy-duty applications.
Storage and Packaging Guidelines
To preserve the magnetic and chemical properties of Ferroferric Oxide Black:
- Packaging: Use anti-static, moisture-proof bags with inner polyethylene liners to prevent oxidation and agglomeration.
- Storage Conditions:
- Temperature: <35°C
- Humidity: <50% RH
- Avoid exposure to strong magnetic fields or corrosive gases.
- Shelf Life: 18-24 months in unopened packaging.
Key Applications in Brake Linings Mixes
Ferroferric Oxide Black is typically combined with:
- Binders: Phenolic resins or polyurethane.
- Reinforcements: Aramid fibers, steel wool.
- Lubricants: Graphite, molybdenum disulfide.
This hybrid brake linings formula balances high friction efficiency, thermal resistance, and compliance with environmental regulations (e.g., low copper content).