Investigation on the Crystallization Process of Eu3+:CaSiO3 Gel Using Optical and Thermal Methods
Ž. Andrić, R. Krsmanović, M. Marinović-Cincović, T. Dramićanin, B. šećerov and M.D. Dramićanin
Vinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia
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Received: 3 09 2007;
Alkoxy sol-gel technique is an important preparation method for production of rare-earth based phosphors. Crystallization of gel provides a way to prepare phosphors on lower working temperatures than those required for the solid state reactions. CaSiO3 gel samples were obtained through hydrolysis-condensation reactions of tetraethylorthosilicate as silica source. In this work we studied the process of crystallization of Eu3+-activated CaSiO3 gel and decomposition of organic precursors by means of thermal analysis and infrared spectroscopy. Results of scanning electron microscopy and energy-dispersion spectrometry are used to check chemical composition and morphology of synthesized material. Emission spectra and emission lifetime measurements are performed to investigate luminescence properties of Eu3+ doped CaSiO3 powder.
DOI: 10.12693/APhysPolA.112.969
PACS numbers: 61.43.Gt, 61.46.Hk, 68.37.Hk, 78.67.Bf, 81.70.Pg