کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9761829 | 1498429 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Uranium-doped britholites CaxLay(SiO4)6âu(PO4)uOt:U synthesis, characterization and preliminary study of uranium diffusion
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Natural apatitic phosphosilicates, generally called “britholites”, were found to contain certain amounts of radioactive elements or fission products. Thus, britholites have been the object of a great interest because of their potential application as typical matrices for the conditioning of nuclear wastes. In the present report, uranium-doped oxy-silicophosphates CaxLay(SiO4)6âu(PO4)uOt/U were synthesized by high-temperature solid-state reaction. The prepared compounds were characterized by X-ray diffraction method, Raman diffusion spectroscopy and X-ray microprobe. The uranium solubility in such compounds was studied. The uranium thermal diffusion in the britholite with the theoretical formula Ca5La5(SiO4)3(PO4)3O2 was estimated. The bands present in the Raman spectra were identified and assigned to the corresponding vibration modes of SiO4 and PO4 anions. The diffusion coefficient of uranium in the studied apatite was found close to that calculated for europium and lanthanum in some other apatites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 1â2, 14 January 2005, Pages 225-231
Journal: Solid State Ionics - Volume 176, Issues 1â2, 14 January 2005, Pages 225-231
نویسندگان
Riadh El Ouenzerfi, Marie-Thérèse Cohen-Adad, Christelle Goutaudier, Gérard Panczer,