Patent ID: 9688911
Date: 2017-06-27
CPC Classifications: C09K

Claim:
1. A method of fabricating a yttrium aluminum garnet (YAG) phosphor, the method comprising: obtaining aluminum hydroxide core particles by heating an aluminum ion solution comprising aluminum nitrate, aluminum sulfate and urea; contacting the aluminum hydroxide core particles with an aqueous solution comprising yttrium, urea, and a lanthanide element or chromium to form an aqueous dispersion of aluminum hydroxide core particles having a shell formed thereon, wherein the shell comprises a compound of yttrium and the lanthanide element or chromium; obtaining aluminum hydroxide particles with a shell formed thereon from the aqueous dispersion; drying the aluminum hydroxide core particles having the shell formed thereon; and calcining the dried aluminum hydroxide core particles having the shell formed thereon in an oxygen atmosphere and a forming gas atmosphere to obtain hollow YAG particles, wherein the hollow YAG particles have a substantially spherical shape.