Our high-purity pyrite (iron sulfide, FeS₂) powder is a premium functional filler for brake pad manufacturing. Engineered for friction materials, it delivers stable friction coefficients, excellent high-temperature resistance, and reduced thermal fade. Ideal for disc and drum brake formulations, our pyrite powder enhances durability, braking stability, and cost-efficiency.
1. Product Overview
Pyrite (FeS₂), also known as iron sulfide, is a critical mineral additive for brake pads. Processed into fine powder, it acts as a friction regulator, lubricant, and reinforcing filler in brake material formulations.
2. Key Benefits for Brake Pads
- Stable Friction: Maintains consistent friction coefficients under extreme heat (up to 700°C), preventing brake fade.
- High Wear Resistance: Hardness (6–6.5) and density (4.9–5.2 g/cm³) extend pad lifespan.
- Thermal Stability: Decomposes at 540–700°C, dissipating heat and reducing noise.
- Cost-Effective: Low dosage (2–8% by weight) with high performance.
Reference for Brake Pad Formula Quantities
| Types of brake pads | Recommended dosage of pyrite (wt.%) | Formula positioning | Remark |
| Ordinary disc brake pads | 1-2% | Basic economic formula | Edmonds Cookery Book |
| High-performance ceramic-based brake pads | 2-4% | Mid-to-high-end wear-resistant formula | Universal in the friction materials industry |
| Heavy-duty drum brake pads | 3-6% | High-load and high-temperature resistant formula | For commercial vehicles only |
| High-performance brake pads for racing cars | 5-8% | Extreme working condition wear-resistant formula | Stable friction coefficient at extreme temperatures |
| Clutch face plate | 2-5% | Universal friction material formula | For reference of the same series of products |
4. Applications
- Disc brake pads (passenger cars, trucks)
- Drum brake linings
- Ceramic and semi-metallic brake formulations
FAQ
Q1: What role does pyrite play in brake pads?
A1: Pyrite acts as a friction regulator, solid lubricant, and reinforcing filler. It balances hardness and friction, stabilizes performance under high heat, and reduces wear and noise.
Q2: Why choose pyrite over other additives?
A2: Pyrite offers excellent thermal stability (resists fade), high durability, and low cost. It requires only 2–8% dosage, making it more economical than synthetic additives.
Q3: What grade of pyrite is best for brake pads?
A3: Use high-purity FeS₂ powder (S＞48%, Fe＞42%) with -325 mesh particle size. This ensures uniform dispersion and optimal friction performance.
Q4: Can pyrite reduce brake noise?
A4: Yes. Pyrite’s lubricating properties minimize metal-to-metal contact, reducing squeal and vibration during braking.
Q5: Is pyrite safe for brake pad production?
A5: Absolutely. Pyrite is non-toxic and chemically stable under normal manufacturing conditions. It complies with global friction material standards.
Ready to enhance your surface treatment processes with our Iron Sulfide Sand For Abrasives? Get in touch with us today for a quote or to learn more about our products.
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