A layer-by-layer method is used to coat silica on the red phosphor powders of Y2O2S:Eu in aqueous solutions. A cationic coating, and the precipitating sodium silicate solution, to form negatively charged silica film on the PEI-coated phosphor powder as the second-layer coating. Repetition of the above coating process in aqueous solutions, a uniform, multiple silica/PEI bilayer coating on phosphor powder is formed.
Origin
National Tsing Hua University, Taiwan
Journal Title
J Am Ceram Soc 88 5 2005 1341-1344
Sector
Special Glass
Class
S 2941