How Strong Is a Ferrite Magnet? Calculation Methods & Industrial Applications

Ferrite magnets (ceramic magnets) dominate 68% of the global permanent magnet market due to their cost-effectiveness and corrosion resistance. But their magnetic field strength often raises critical questions: How strong are they compared to neodymium? How do engineers calculate their flux density in real-world applications? This guide provides data-backed answers and actionable calculation frameworks.

Ferrite Magnet Field Strength: Key Metrics

1. Typical Flux Density (Br)

Ferrite magnets exhibit intrinsic flux densities between 0.2–0.4 Tesla (T), with grades categorized as:

• Y30: 0.38–0.40T (General purpose)

• Y35: 0.40–0.43T (High-performance motors)

• Anisotropic grades: Up to 0.45T (Directionally pressed)

Comparative Insight:

• Neodymium (NdFeB): 1.0–1.4T

• Alnico: 0.7–1.3T