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Growth of long persistent $SrAl_2O_4:Eu^{2+},\;Dy^{3+}$ phosphor single crystals by the Verneuil method  

Nam, Kyung-Ju (Department of Gemological Engineering, Dongshin University)
Choi, Jong-Keon (Department of Gemological Engineering, Dongshin University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.15, no.6, 2005 , pp. 225-228 More about this Journal
Abstract
We have grown the long persistent $SrAl_2O_4:Eu^{2+},\;Dy^{3+}$ phosphor single crystal by Verneuil method. The obtained single crystals were long persistent phosphorescence peaking at ${\lambda}=520nm$ with a size of about 5 mm diameter, 55 mm length. The melting temperature of $SrAl_2O_4:Eu^{2+},\;Dy^{3+}$ measured $T_{mp}=1968^{\circ}C$. The optimum composition was $SrCO_3:Al(OH)_3:Eu_2O_3:Dy_2O_3$ = 1 : 2 : 0.015 : 0.02. Flow rate of $H_2:O_2$ is about 4 : 1. Growthing rate is about 5 mm/hr. The spectra of the phosphorescence from the crystals are quite similar to those obtained with sintered powders used for luminous pigments. The crystalline structure of long persistent $SrAl_2O_4:Eu^{2+},\;Dy^{3+}$ phosphor single crystal was determined by X-ray diffraction.
Keywords
$SrAl_2O_4:Eu^{2+},\; Dy^{3+}$; Phosphor single crystal; Phosphorescence; Verneuil method;
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1 L. Yuanhua, Z. Zhongtai, Z. Feng, T. Zilong and C. Qingming, 'Preparation of the ultrafine $SrAl_2O_4$: Eu, Dy needle-like phosphor and its optical properties', Materials Chemistry and Physics 65 (2000) 103
2 D. Andre and C. Mickael, 'Crystallisation of spraydried amorphous precursors in the $SrO-Al_2O_3$ system: a DSC study', J. European Ceramic Society 23 (2003) 2075   DOI   ScienceOn
3 C. H. L. Goodman, Crystal Growth Theory and Techniques, Plenum press, New York and London (1978) p.109
4 J. Sanchez-Benitez, A. de Andres, M. Marchal, E. Cordoncillo, M. Vallet Regi and P. Escribano, 'Optical study of $SrAl_{1.7}B_{0.3}O_4$ : Eu, R (R = Nd, Dy) pigments with long-lasting phosphorescence for industrial uses', J. Solid State Chem. 171 (2003) 273
5 T. Matsuzawa, Y. Aoki, N. Takeuchi and Y. Murayama, 'A new long phosphorescent phosphor with high brightness, $SrAl_2O_4LEu^{2+}\;,\;Dy^{3+}$', J. Electrochem. Soc. 143(8) (1996) 2670   DOI   ScienceOn
6 Y. Ping, K. L. Meng, F. S. Chun, W. L. Su, X. Dong, R. Y. Duo and F. C. Xiu, 'Preparation and tunable photoluminescence characteristics of $Ni^{2+}\;:\;SrAl_2O_4$', Optical Materials 24 (2003) 575   DOI   ScienceOn
7 D. Ravichandran, S. T. Johnson, S. Erdei, R. Roy and W. B. White, 'Crystal chemistry and luminescence of the $Eu^{2+}$-activated alkaline earth aluminate phosphors', Displays 19 (1999) 197