Industrial context.
Dysprosium can improve resistance to demagnetisation in demanding NdFeB designs. Material addition and grain-boundary diffusion differ in how much heavy rare earth is required.
Questions for a supplier.
Ask the magnet maker how it achieves the required coercivity and which temperatures were tested. The target depends on duty cycle, geometry and manufacturing route.
Sources and scope
- IEA · Rare Earth Elements8 April 2026
The IEA estimates China’s 2024 shares at 60% of magnet rare-earth mining, 91% of refining and 94% of sintered permanent magnet production. The first two cover Nd, Pr, Dy and Tb.
- USGS · Mineral Commodity Summaries, rare earths chapter2026 edition
USGS estimates 2025 world mine production of all rare earths at a rounded 390,000 metric tonnes of rare-earth oxide equivalent.
APPLY THE RESEARCH
Make your assumptions explicit.
Build an illustrative magnet quantity plan using the finished component specification.