US 8,540,173 B2 · Production of fine particles of functional ceramic by using pulsed laser

Abstract

A method of forming nanometer sized fine particles of functional ceramic from a bulk functional ceramic, particularly fine particles of phosphorous ceramics from a bulk phosphor material is disclosed. The method relies on irradiation of a bulk phosphorous ceramic in a liquid with an ultrashort-pulsed-laser-fragmentation beam to thereby form nanometer sized particles of the phosphorous ceramic. The method is unique in that the generated particles retain the chemical and crystalline properties of the bulk phosphorous ceramic. The generated solutions are stable colloids from which the particles can be isolated or used as is.

Claims8

Dependent claims

A method of fabricating a solution of fine particles of a multi-element ceramic comprising the steps of:

a) providing a bulk target material of a multi-element ceramic comprising at least three elements with at least a portion of the target material being in contact with at least a portion of a liquid;
and
b) irradiating the target material with an ultrashort-pulsed-laser-fragmentation beam having a pulse duration of 500 picoseconds or less and forming fine particles of the multi-element ceramic having an average diameter ranging from 1 to 5000 nanometers, wherein the fine particles retain the chemical composition and crystalline structure of the bulk target material.

Dependencies are inferred from the claim text.

Facts

Application

12/951,557Filed 22 Nov 2010 · us provisional application

Priority

10 Feb 2010

Published

US 2011/0193025 A111 Aug 2011

Granted

24 Sep 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C09K 11/025
Use of particular materials as binders, particle coatings or suspension media therefor: non-luminescent particle coatings or suspension media
C09K 11/08
Luminescent materials, e.g. electroluminescent or chemiluminescent: containing inorganic luminescent materials
Y10T 428/2982
Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof: particulate matter…
C09K
Materials for miscellaneous applications, not provided for elsewhere

Production of fine particles of functional ceramic by using pulsed laser

Life of this patent

Production of fine particles of functional ceramic by using pulsed laser

Life of this patent

Abstract

Claims8