کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5441300 1510383 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure, thermal analysis and optical properties of lithium tungsten-titanophosphate glasses
ترجمه فارسی عنوان
ساختار، تجزیه حرارتی و خواص اپتیکی عینک تنگستن لیتیم تیتانو فسفات لیتیوم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
A melt-quenching method is used to prepare homogeneous glasses inside the 20Li2O-(50-x)Li2WO4-xTiO2-30P2O5 (x = 0, 5, 8, 10 and 15 mol%) system. The amorphous and glassy states of the glasses are evidenced by the X-ray diffraction and differential scanning calorimetry (DSC) analysis, respectively. The glasses were found to be colorless. The determined parameters for the glasses such as density, molar volume and glass transition temperature (Tg) depend strongly on the chemical composition of the glasses. The density and Tg are found to decrease and increase with TiO2 content, respectively. Infrared (IR) spectroscopy is used to characterize their structural approach. This technique has allowed the identification of different phosphate structural units mainly pyrophosphate and metaphosphate in their structure. From the absorption edge studies, the values of the optical band gap, Eg, and Urbach energy, ΔE, were evaluated. The optical band gap is found to depend on the glass composition and it decreases as the content of the TiO2 increases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 463, 1 May 2017, Pages 12-18
نویسندگان
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