Browse > Article

Preparation of Y2O2:Eu Red Phosphor by Sol-Gel and Calcination Process  

Yoon, Ho-Sung (Mineral & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Kim, Chul-Joo (Mineral & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Jang, Hee Dong (Mineral & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Publication Information
Korean Chemical Engineering Research / v.46, no.3, 2008 , pp. 506-511 More about this Journal
Abstract
In this study sol-gel and combustion process was surveyed for the preparation of the red $Y_2O_3$: Eu phosphor, and the properties of phosphor was considered. Chelation and hydrolysis in amorphous citrate sol-gel process were completed in initial reaction stage, and water-forming condensation was superior to organic acid-forming condensation. The mole ratio of citric acid to metal ion had to be above to for the progress of sol-gel process. The dried gel powders are mostly amorphous, and crystallize completely at $700^{\circ}C$, and the crystallinity increases with increasing calcining temperature. The luminescence property of the phosphor was analyzed by measuring the emission spectra. The luminescence intensity increases when the calcination temperature and concentration of metal ions in solution increase.
Keywords
Sol-Gel Process; Red Phosphor; Yttrium; Europium; Citric Acid;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Pechini, M. P., "Method of Preparing Lead and Alkaline Earth Titanates and Niobates and Coating Method Using The Same to Form A Capacitor," United States Patent Office 3,330,697(1967)
2 Yang, et al., "Synthesis of $Nd_2O_3$ Nano Powders by Sol-Gel Auto-Combustion and their Catalytic Esterification Activity," Materials Chemistry and Physics, 84, Issue 1, pp. 52-57(2004)   DOI   ScienceOn
3 Han, S. D. et al., "Study on Synthesis and Application of Nano Phoshors Doped with Rare Earth Ions," KIER Technical Report (2005)
4 Park, H. D., Kang, Y. C., "Research Trend of Phosphors," CHEMWORLD, 5(2002)
5 Brinker, C. J., et al., "Sol-Gel Science," Academic Press(1990)
6 Griesmar, P., et al., "Kinetic Study of Silicon Alkoxides Gelation by Acoustic and Rheology Investigation," J. of Non-crstallization Solids, 319, 57-64(2003)   DOI   ScienceOn
7 Ch. L. Robert et al., "Powder Synthesis of Nanocrystalline $ZrO_2-8%\;Y_2O_3$ Via a Polymerization Route," Materials Research Bulletin 36, 2083-2101(2001)   DOI   ScienceOn