Title: Rare Earth Oxide Fluoride Nanoparticles And Hydrothermal Method For Forming Nanoparticles

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.

Inventors:

Fulton, John L ^[1]; Hoffmann, Markus M ^[1]

---

+ Show Inventor Affiliations

1. Richland, WA

Issue Date:

2003-12-23

Research Org.:

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

OSTI Identifier:

879722

Patent Number(s):

6667019

Application Number:

09/949299

Assignee:

Battelle Memorial Institute (Richland, WA)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

Show more

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J27/12 - Fluorides
B01J35/0013 - {Colloids}
B01J37/0211 - {using a colloidal suspension}

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

C01F17/259 - Oxyhalides

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/72 - by d-values or two theta-values, e.g. as X-ray diagram
C01P2004/03 - obtained by SEM
C01P2004/10 - extending in one dimension, e.g. needle-like
C01P2004/54 - Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
C01P2004/62 - Submicrometer sized, i.e. from 0.1-1 micrometer
C01P2004/64 - Nanometer sized, i.e. from 1-100 nanometer

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/3224 - Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
C04B2235/3225 - Yttrium oxide or oxide-forming salts thereof
C04B2235/445 - Fluoride containing anions, e.g. fluosilicate
C04B2235/524 - Non-oxidic, e.g. borides, carbides, silicides or nitrides
C04B2235/526 - characterised by the length of the fibers
C04B2235/5264 - characterised by the diameter of the fibers
C04B2235/5292 - Flakes, platelets or plates
C04B2235/5296 - with a defined aspect ratio, e.g. indicating sphericity
C04B35/553 - based on fluorides
C04B35/62272 - {based on non-oxide ceramics
C04B35/80 - Fibres, filaments, whiskers, platelets, or the like {

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S977/775 - Nanosized powder or flake, e.g. nanosized catalyst

Show less

DOE Contract Number:  

AC06-76RL01830

Resource Type:

Patent

Country of Publication:

United States

Language:

English