کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7900473 | 1510366 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Network connectivity and properties of non-alkali aluminoborosilicate glasses
ترجمه فارسی عنوان
اتصال به شبکه و خصوصیات عینک آلومینیوم بیروسیلیکات غیر قلیایی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The effects of alkaline earth metal oxides (RO) concentrations on the network structure and properties of non-alkali aluminoborosilicate glasses were studied. With the increasing of RO concentrations from 10 to 20Â mol%, the number of Q4 units decreased, while the number of Q3 units increased. The [AlO4] units always predominated in Al groups, and the fraction of [BO4] among B groups increased from 2% to 10%. Meantime, the value of NBO/T increased from 0.48 to 0.70, indicating the weak network connectivity. The depolymerization of T-O-T network resulted in higher coefficient of thermal expansion, lower temperature of transition point, weaker durability in HF acid. While, the increasing in R2Â + cations and [BO4] units led to the higher elastic modulus of glasses. The increasing in RO also enhanced the density, dielectric constant and durability in NaOH solution of glasses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 481, 1 February 2018, Pages 403-408
Journal: Journal of Non-Crystalline Solids - Volume 481, 1 February 2018, Pages 403-408
نویسندگان
Jun Xie, Herui Tang, Jing Wang, Mengming Wu, Jianjun Han, Chao Liu,