کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1485029 | 1510529 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tl ion-exchange borosilicate glass: Investigation of the Tl site by X-ray absorption spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Tl ion-exchange borosilicate glass: Investigation of the Tl site by X-ray absorption spectroscopy Tl ion-exchange borosilicate glass: Investigation of the Tl site by X-ray absorption spectroscopy](/preview/png/1485029.png)
چکیده انگلیسی
We present a first experimental investigation on the Tl site in Tl-doped borosilicate glass by Tl/Na ion-exchange process. The local order around Tl was investigated by the EXAFS spectroscopy on a set of different samples, obtained by varying the composition of the molten salt bath (TlNO3/NaNO3 molar ratio from 0.001 to 0.4) and the bath temperature (between 350 °C and 380 °C). We show that after a 1 h exchange, Tl is surrounded by O atoms in the first shell and that the Tl-O distance is sensibly shorter than both the Tl-O distance found in Tl oxides and the typical Na-O distance in a glass. When the exchange process is extended to 1 week, the measured Tl-O distance increases towards the values found in crystalline Tl oxides, suggesting a stress release during longer exchange duration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 354, Issues 2â9, 15 January 2008, Pages 124-128
Journal: Journal of Non-Crystalline Solids - Volume 354, Issues 2â9, 15 January 2008, Pages 124-128
نویسندگان
C. Maurizio, F. D'Acapito, E. Ghibaudo, J.E. Broquin,