Industrial context.
Terbium can be applied in specialised NdFeB formulations or grain-boundary diffusion routes to increase coercivity. Its use is grade- and process-specific.
Questions for a supplier.
Ask which material form and qualification route apply, whether a heavy-rare-earth-free grade is technically viable and how changes would be controlled.
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.