来源：ACS PublicationsThe synthesis of alkali-metal-free compounds [LnMe3]n is scrutinized using two distinct protocols. The donor-promoted cleavage of homoleptic tetramethylaluminate complexes Ln(AlMe4)3 proves rare-earth metal (Ln) size-dependent and gives access to [LnMe3]n (small to midsized Ln(III)) and [LnMe3-x(AlMe4)x(OEt2)y] (large Ln(III)). Both compounds can be converted to homoleptic tetramethylgallates Ln(GaMe4)3 by addition of trimethylgallium. Crystallization attempts of [LnMe3-x(AlMe4)x(OEt2)y] via extended donor-solvent treatment produced structural snapshots of a diverse set of c...
Release time:
2026
-
10
-
08
viewed：1
来源：ScienceDirectIn the in-situ leaching of ionic rare earth ores, ineffective through-flow induced by ore body heterogeneity and suboptimal rinsing strategies constrain both extraction efficiency and mine environmental sustainability. This study employed an experimentally validated pore-scale numerical model, reconstructed from nuclear magnetic resonance imaging, to elucidate magnesium ion transport mechanisms and optimize rinsing operations for enhanced in-situ leaching performance. Simulation results showed a three-stage transport pattern in magnesium ion migration through heterogeneous ore ...
Release time:
2026
-
09
-
30
viewed：0
来源：ScienceDirectWeathered crust elution-deposited rare earth ores (WREOs) are an important source of medium and heavy rare earth elements in China. However, the conventional ammonium sulfate leaching process is often hindered by clay mineral swelling, pore-structure deterioration, and associated mass transfer resistance. In this study, potassium humate (KA) was introduced as a leaching aid to enhance rare earth extraction from WREOs. The effects of particle size, KA concentration, and temperature on leaching behavior were systematically investigated. Leaching kinetics were analyzed using the s...
Release time:
2026
-
09
-
30
viewed：3
A coupled phase diagram and first-principles design strategy for high-efficiency multiphase rare-earth alloy diffusion sources in sintered Nd-Fe-B magnets来源：ScienceDirectThis study presents a high-performance rare-earth alloy diffusion source design for sintered Nd-Fe-B magnets, intends to overcome the limitations associated with empirical and “trial-and-error” development approaches. Phase diagram simulations were employed to construct a multiphase, low-melting-point diffusion source alloy system, while first-principles calculations were utilized to systematically evaluate the solubility of d...
Release time:
2026
-
09
-
29
viewed：4