Car Starter Motor Magnet

Our premium permanent magnet ferrite magnets are engineered specifically for the demanding environment of car starter motors. This car starter motor magnet from high-performance SrFe (Strontium Ferrite) material with an AB2O4 crystal structure, these magnets deliver exceptional magnetic properties and outstanding temperature stability, ensuring your vehicle starts reliably time after time.

The secret to their performance lies in our meticulous manufacturing process. We begin with ultra-pure Fe₂O₃ raw material (purity >99.8%). Through advanced ball milling techniques, we precisely control the particle size to between 0.8-1.2 micrometers, guaranteeing remarkable consistency and stability in the final product. The forming process utilizes dry pressing technology under precisely controlled pressure (120-150 MPa), achieving a relative density exceeding 95% in the green compact. The sintering phase is critical; we employ a multi-stage temperature control process reaching a peak of 1250°C, followed by a specialized cooling protocol. This ensures uniform grain growth, with an average crystal grain size maintained between 2-3 μm.

Rigorous performance testing validates their capabilities. The car starter motor magnet exhibit a magnetic flux decay rate of less than 5% across an extreme operating temperature range from -40°C to 150°C, effortlessly meeting the stringent requirements of modern automotive starter motors. Key magnetic properties include a high remanence (Br) of 380 mT and a robust coercivity (Hcj) of 280 kA/m, providing the necessary strong magnetic field for high-torque starting.

Durability is paramount. A special surface treatment process grants these magnets superior corrosion resistance, effectively shielding them from common automotive hazards like oil, grease, moisture, and various chemicals. This is proven through salt spray testing exceeding 500 hours without significant degradation. Choose our car starter motor magnet for unparalleled reliability, performance, and longevity, ensuring your engine starts smoothly in any climate.

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