Patent ID: 9469806
Filing Date: 2016-10-18
CPC Classification: C04B,C09K

Claim Text:
1. A method for forming a coated particle comprising YAG, said method consisting of the steps of: preparing a solution comprising ethanol, water, HCL and a sintering aid or sintering aid precursor; mixing YAG-containing particles with said solution and ethanol to form a slurry; spraying the slurry into a drying column at a temperature of about 350° C. wherein the drying column was constructed as a vertical glass tube; positioning an ultrasonic atomizer at the top of the drying column; positioning a fan at the bottom of the drying column; creating a downward suction; evaporating the solvents as the slurry falls through the drying column; achieving saturation of the sintering aid or sintering aid precursor; precipitating and depositing on the YAG particles a coating; 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 beneath the coating of the coated particle; wherein if the solution comprises a sintering aid precursor the sintering aid precursor comprises a material selected from the group consisting of silicon dioxide, fluoride salt, magnesium oxide and combinations thereof; and sintering and producing a transparent YAG ceramic.