NdFeB Magnet Test Process
Key Testing Technologies in NdFeB Manufacturing Process
1. Magnetic Property Testing
Our lab utilizes B-H hysteresis testers to measure key parameters including remanence (Br), coercivity (HcJ/HcB), Squareness Ratio (Mr/Ms) and maximum energy product (BH)max. We are equipped with high-precision measurement systems capable of testing from -50°C to 300°C, featuring:
Closed-loop temperature control (±0.5°C accuracy)
High-temperature probes (up to 350°C)
Real-time monitoring of temperature-dependent magnetic properties
Automatic calculation of reversible/irreversible loss coefficients
All tests comply with IEC 60404-5 standards.
2. Laser Particle Size Analysis
Malvern laser particle analyzers measure powder size distribution (D10/D50/D90). Optimal distribution (3-5μm) ensures proper compaction and sintering density.
3. ICP Composition Analysi
Malvern laser particle analyzers measure powder size distribution (D10/D50/D90). Optimal distribution (3-5μm) ensures proper compaction and sintering density.
3. ICP Composition Analysi
ICP-OES precisely measures rare earth elements (Nd, Pr, Dy, Tb) with ppm-level detection limits, while also analyzing main elements (Fe, Co, B).
4. ONH Element Analysis
ONH analyzers detect oxygen (<2000ppm), nitrogen and hydrogen (<5ppm) content through inert gas fusion, preventing material embrittlement.
5. Carbon/Sulfur Analysis
High-frequency IR analyzers control carbon (<200ppm) and sulfur (<50ppm) content to avoid carbide formation and grain boundary corrosion.
6. Multipole Magnet Ring Testing
6. Multipole Magnet Ring Testing
High-precision Hall sensor arrays (0.1mT resolution) and rotary stages (0.1° accuracy) verify pole alignment (±0.5°) and field uniformity (<5% variation).
