Hydrothermal method for manufacturing nano to microscale particles

摘要

Producing micro- or nanoparticles of rare earth or transition metal compounds comprises hydrothermal precipitation from a metal salt solution using a soluble weakly basic precipitant. Independent claims are also included for: (1) micro- or nanoparticles of niobium or tantalum compounds produced as above; (2) sols comprising the above micro- or nanoparticles.