Rare earth oxide fluoride nanoparticles and hydrothermal method for forming nanoparticles
AssigneeBattelle Memorial Institute
InventorsJohn L. Fulton, Markus M. Hoffmann
Life of this patent
Estimating the term…
Abstract
A hydrothermal method for forming nanoparticles of a rare earth element, oxygen and fluorine has been discovered. Nanoparticles comprising a rare earth element, oxygen and fluorine are also described. These nanoparticles can exhibit excellent refractory properties as well as remarkable stability in hydrothermal conditions. The nanoparticles can exhibit excellent properties for numerous applications including fiber reinforcement of ceramic composites, catalyst supports, and corrosion resistant coatings for high-temperature aqueous solutions.
Claims16
An oxygen-containing fluoride material comprising:
- nanoparticles comprising (1) a rare earth element, scandium or yttrium, (2) oxygen and (3) fluoride;
- wherein the nanoparticles have a diameter smaller than one micrometer;
- and
- wherein the nanoparticles comprise nanofibers having an approximately circular cross-section, and a length to diameter aspect ratio of at least 10.
An oxygen-containing fluoride material comprising:
- nanoparticles comprising (1) a rare earth element, scandium or yttrium, (2) oxygen and (3) fluoride;
- wherein the nanoparticles have a diameter smaller than one micrometer;
- wherein the nanoparticles maintain their dimensions and at least 90% of their mass after 12 hours in water at 300° C. and a pressure of about 400 bar;
- and
- wherein the nanoparticles comprise nanofibers having an approximately circular cross-section, and a length to diameter aspect ratio of at least 10.
Dependencies are inferred from the claim text.