کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7900960 | 1510425 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanical relaxation of some tellurovanadate glasses
ترجمه فارسی عنوان
آرامش مکانیکی برخی از عینک های تلورووانادات
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The ultrasonic relaxation process of ZnO-TeO2-V2O5 and CeO2-TeO2-V2O5 glasses was investigated in terms of the central force model of acoustically active two-well systems. The theoretical treatment of the vibrations of two-well systems revealed that, the equilibrium interatomic separation, the number of loss centers and the activation energy are affected with the mutual potential energy of the studied glasses. The number of loss centers is related to the compositional dependence of the elastic moduli and the average ring diameter. The results showed that degree of elongation or contraction of the two-well system depends on the concentration of CeO2 or ZnO. The theoretically determined longitudinal and transverse deformation potentials due to the acoustic loss produced by two-well systems decrease with the increase of ZnO/CeO2 content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volumes 417â418, 1â15 June 2015, Pages 28-33
Journal: Journal of Non-Crystalline Solids - Volumes 417â418, 1â15 June 2015, Pages 28-33
نویسندگان
Yasser B. Saddeek, R. El-Mallawany, H. Afifi,