A study was conducted to analyze the synthesis of BaAl2S 4:Eu phosphor material employing a solution method. The study showed that sulfurization does occur, though it is not complete, and an oxysulfide phase forms as an intermediate compound. Additional annealing in the Ar/CS 2 glass flow was necessary, while BaAl2S4:Eu was found to be the main phase after the second annealing, and the third annealing yields an almost single phase cubic BaAl2S4:Eu. The results of the study show substantially better homogeneity of the material prepared by the solution method compared to BaAl2S4 synthesized by the solid state reaction. The study also found that the synthesis route is insensitive to ambient humidity because it does not have to deal with unstable sulfides such as BaS and Al2S3 used in the usual ceramic method.
|Number of pages||3|
|Journal||Chemistry of Materials|
|Publication status||Published - 2008 Aug 26|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Chemistry