Tailored synthesis in nanoparticle permanent magnets (NPPMs)

CMI researchers from Ames National Laboratory conducted the activity for this highlight

Innovation    
Optimized the post-synthesis washing procedure of Sm₂Fe₁₇N₃ powders crucial to enhancing magnetic properties of the dense magnets.

Achievement    
Achieved ~5X reduction in oxygen content for Sm₂Fe₁₇N₃ powders.

Significance and Impact    
Synthesis of Sm₂Fe₁₇N₃ via reduction-diffusion of Sm₂O₃ leads to the formation of CaO as side product. Removing CaO without introducing undesirable surface oxidation leads to degradation of magnetic performance during consolidation. New solvents and washing condition resulted in our lowest measured oxygen content yet and yield sustainable, scabble process.

Hub Target Addressed    
Increasing the speed of discovery and integration.