کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1484138 1510520 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fast X-ray scattering measurements on high temperature levitated liquids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Fast X-ray scattering measurements on high temperature levitated liquids
چکیده انگلیسی

We describe a new high temperature environment based on aerodynamic levitation and CO2 laser heating designed for high energy X-ray diffraction at the ID11 beamline at ESRF. The use of two lasers simultaneously provides a homogeneous temperature and makes it possible to explore the supercooled state with a high degree of control (about 500 °C below the melting point in this work) and to work very close to Tg. The scattered beam is measured over a relatively wide Q-range of 0.5–19 Å−1 with the ESRF Frelon 2D CDD camera. Using 1-min measurements we obtained good quality structure factors at various temperatures in the liquid and supercooled state of CaAl2O4. We also performed time-resolved measurements using an acquisition time of 100 ms and we obtained good statistics even at large Q. The Al–O and Ca–O bond lengths and coordination numbers derived from the calculated pair distribution functions are in good agreement with our previous X-ray and neutron works.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 354, Issues 47–51, 1 December 2008, Pages 5104–5107
نویسندگان
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