For brake system manufacturers, maintaining a steady, powerful friction coefficient in brake pads friction materials is non-negotiable—and Bull Chemicals’ Calcined Alumina is engineered to make this a reality. As a trusted supplier of high-performance additives for brake pads mixes and formulas, we’ve refined our Calcined Alumina to directly solve the pain points of inconsistent braking performance. Here’s how it works.
Table of Contents
First: Boosts Friction Coefficient with Controlled Hardness
Our Calcined Alumina (with a Mohs hardness of 9, second only to diamond) acts as a critical “friction enhancer” in brake pads mixture. When added at a precise 8-12% ratio in brake pads formula, it creates micro-roughness on the friction surface—effectively lifting the baseline friction coefficient from 0.3 (common in basic organic formulas) to 0.4-0.45. This ensures stronger initial braking force, especially for heavy-duty vehicles like trucks and SUVs.
Second: Stabilizes Friction Coefficient Across Extreme Conditions
Unlike conventional abrasives, our Calcined Alumina has ultra-low thermal expansion (only 8.8×10⁻⁶/℃) and maintains structural stability up to 1770℃. In brake pads friction materials, this means it resists “thermal fading”—a major cause of friction coefficient drop. Tests show that in continuous downhill braking (temperatures reaching 600℃), brake pads with our Calcined Alumina keep friction coefficient fluctuation within ±5%, compared to ±15% in mixes without it. It also prevents coefficient spikes in cold (-30℃) environments, ensuring smooth braking year-round.
Third: Optimizes Compatibility in Brake Pads Mixes
Our Calcined Alumina features a tailored particle size (D50=15-20μm) that blends seamlessly with resins, fibers, and other fillers in brake pads mixture. This uniform dispersion avoids “hard spots” that cause uneven wear and coefficient instability. In our standard brake pads formula, it improves the bonding strength between friction components by 18%, further locking in consistent friction performance over the brake pad’s 60,000+ km service life.
Bull Chemicals’ Calcined Alumina isn’t just an additive—it’s a solution for reliable, long-lasting brake pads. We ensure every batch meets the strictest standards for brake pads friction materials, helping you deliver safer braking systems to the market.
