Flame spray synthesis of monoclinic Lu2O3 nanoparticles

Patent metadata

Field	Value
Publication number	US-9533892-B2
Application number	US-201514797398-A
Country	US
Kind code	B2
Filing date	Jul 13, 2015
Priority date	Sep 2, 2011
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A nanoparticle containing monoclinic lutetium oxide. A method of: dispersing a lutetium salt solution in a stream of oxygen gas to form droplets, and combusting the droplets to form nanoparticles containing lutetium oxide. The combustion occurs at a temperature sufficient to form monoclinic lutetium oxide in the nanoparticles. An article containing lutetium oxide and having an average grain size of at most 10 microns.

First claim

What is claimed is:

1. A method comprising:
dispersing a lutetium salt solution in a stream of oxygen gas and a fuel to form droplets; and
combusting the droplets to form nanoparticles comprising lutetium oxide;
wherein the combustion occurs at a temperature sufficient to form monoclinic lutetium oxide in the nanoparticles.

2. The method of claim 1 , wherein the stream of oxygen gas flows at a rate of at least 3 L/min.

3. The method of claim 1 , wherein the solution further comprises a rare earth salt.

4. The method of claim 3 , wherein the rare earth salt is a ytterbium salt, a holmium salt, or a europium salt.

5. The method of claim 1 , further comprising:
collecting the nanoparticles.

6. The method of claim 5 , further comprising:
densifying the nanoparticles to form a monolithic mass.

7. The method of claim 6 , wherein the densifying is performed by:
mixing the nanoparticles with a sintering agent; and
pressing and sintering the nanoparticles.

8. A method comprising:
dispersing a lutetium salt solution in a stream of oxygen gas and a fuel to form droplets; and
combusting the droplets to form nanoparticles comprising lutetium oxide;
wherein the combustion occurs at flow rates of the oxygen, the fuel, and the solution sufficient to form monoclinic lutetium oxide in the nanoparticles.

9. The method of claim 8 , wherein the stream of oxygen gas flows at a rate of at least 3 L/min.

10. The method of claim 8 , wherein the solution further comprises a rare earth salt.

11. The method of claim 10 , wherein the rare earth salt is a ytterbium salt, a holmium salt, or a europium salt.

12. The method of claim 8 , further comprising:
collecting the nanoparticles.

13. The method of claim 12 , further comprising:
densifying the nanoparticles to form a monolithic mass.

14. The method of claim 13 , wherein the densifying is performed by:
mixing the nanoparticles with a sintering agent; and
pressing and sintering the nanoparticles.

Assignees

• Baker Colin C
• Kim Woohong
• Villalobos Guillermo R
• Sanghera Jasbinder S
• Aggarwal Ishwar D
• Us Navy

Inventors

• Baker Colin C
• Kim Woohong
• Villalobos Guillermo R
• Sanghera Jasbinder S
• Aggarwal Ishwar D

Classifications

• B82Y30/00 Primary

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C01P2002/54

  one element only · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C04B35/62665

  Flame, plasma or melting treatment · CPC title

• C01P2004/03

  obtained by SEM · CPC title