The Luminescent Properties of Yttrium Oxyapatite Doped with Eu3+ ions
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The structural and luminescent properties of Ca2Y8(SiO4)(6)O-2 (CYS) silicate based oxyapatite doped with Eu3+ ions have been reported in this paper. The sample was synthesized using reflux method assisted by urea subsequent degradation. Very specific, shell- and and rope-like morphologies were observed by SEM. The powder X-ray diffraction study revealed that the Eu3+ : CYS system crystallized in a hexagonal lattice structure (space group P63/m) characteristic of oxyapatite. In the host oxyapatite structure, a partial replacement of Ca2+ and Y3+ ions by luminescent active Eu3+ ions have been done, and its photoluminescent spectra were analyzed. The performed analysis indicate the presence of Eu3+ ions in both, nine-fold coordinated 4f, and seven-fold coordinated 6h sites, showing a slight shift towards the blue area in comparison to a typical spectra of other yttrium-silicate phases as hosts.
Keywords:Urea assisted reflux method / Europium doped yttrium oxyapatites / Luminescent properties / Crystal structure
Source:Science of Sintering, 2014, 46, 1, 129-134
- Ministry of Education, Science and Technological Development of the Republic Serbia