US 2014/0004261 A1 · Sintering Aid Coated YAG Powders and Agglomerates and Methods for Making

Abstract

Method of Making particles including a YAG core and a coating of sintering aid deposited thereon. The particles and agglomerates thereof maybe formed as a powder. The coated YAG-containing particles are well-suited to production of polycrystalline YAG-containing ceramics. The coated YAG-containing particles may be fabricated using a novel fabrication method which avoids the need for formation of a homogeneous powder mixture of YAG and sintering aid. The mixture may be sprayed into a drying column and dried to produce coated particles. Alternatively, the YAG particles and sintering aid or sintering aid precursor solution may be separately introduced to the drying column and dried to form coated YAG-containing particles.

Claims19

Dependent claims

A method for forming a coated particle comprising YAG, said method comprising the steps of:

preparing a solution comprising a sintering aid or sintering aid precursor;
mixing YAG-containing particles with said solution to form a slurry;
and
drying said mixture to form YAG-containing particles with a coating of sintering aid on a surface thereof wherein said coating of sintering aid is continuous and prevents sites where another YAG-containing particle may contact the coated YAG-containing particle;
and
wherein the sintering aid precursor comprises a material selected from the group consisting of silicon dioxide, fluoride salt, magnesium oxide and combinations thereof.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/707,271Filed 6 Dec 2012

Priority

6 Aug 2009

Published

2 Jan 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

C09K 11/025
Use of particular materials as binders, particle coatings or suspension media therefor: non-luminescent particle coatings or suspension media
C04B 35/44
Based on oxide ceramics: based on aluminates
C04B 35/62655
Thermal treatment of powders or mixtures thereof other than sintering: drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying
C04B 35/62807
Oxide ceramics: silica or silicates

Sintering Aid Coated YAG Powders and Agglomerates and Methods for Making

Life of this patent

Sintering Aid Coated YAG Powders and Agglomerates and Methods for Making

Life of this patent

Abstract

Claims19