کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517404 | 1511604 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of the negative thermal expansion of cuprite-type structures by means of temperature-dependent pair distribution function analysis: Preliminary results
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Study of the negative thermal expansion of cuprite-type structures by means of temperature-dependent pair distribution function analysis: Preliminary results Study of the negative thermal expansion of cuprite-type structures by means of temperature-dependent pair distribution function analysis: Preliminary results](/preview/png/1517404.png)
چکیده انگلیسی
Copper (I) and silver (I) oxides crystallize with the same structure, and both show a wide range of negative thermal expansion (NTE): Cu2O contracts with temperature up to about 200Â K and then expands, while Ag2O has a NTE up to its decomposition temperature at about 450Â K. Here we report a careful temperature-dependent pair distribution function (PDF) analysis that showed that copper oxide, at about 200Â K, exhibits geometric distortions of the tetrahedral units, probably related to a change in the solid angle of the polyhedra. Silver oxide, on the other hand, showed the same distortions even at the lowest temperature measured (10Â K): structural refinements of the PDF confirmed the presence of local distortions (below 10Â Ã
) at all temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 9, September 2008, Pages 2182-2186
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 9, September 2008, Pages 2182-2186
نویسندگان
Monica Dapiaggi, HyunJeong Kim, Emil S. Božin, Simon J.L. Billinge, Gilberto Artioli,