کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1298667 | 974010 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic glass transition and fragility of lithium borate binary glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
The compositional variations of the fragility of lithium borate binary glasses have been investigated over a wide composition range up to 64Â mol% of Li2O. The frequency dependences of the dynamic heat capacity Cp(Ï) above the dynamic glass transition temperature Tg have been observed by Temperature-Modulated DSC. The fragility or steepness index m has been determined. The composition dependence has been discussed on the basis of the fragility model proposed by Vilgis, and it has been revealed that the trends of the fragility and the fluctuation of the coordination number of boron atom have the correlation over a wide composition range. The result indicates the origin of the fragility relates to the degree of the fluctuation of the coordination number. The formation of the 4-coordinated boron atom plays the dominant role in the fragility of the borate glassy system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issue 40, 31 December 2008, Pages 2424-2427
Journal: Solid State Ionics - Volume 179, Issue 40, 31 December 2008, Pages 2424-2427
نویسندگان
Yu Matsuda, Yasuteru Fukawa, Mitsuru Kawashima, Seiichi Mamiya, Seiji Kojima,